Package | Source(s) | Maintainer(s) | |
---|---|---|---|
guix-patches | PTS Buildd Popcon |
Report forwarded
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:
bug#52555
; Package guix-patches
.
(Thu, 16 Dec 2021 16:18:02 GMT) (full text, mbox, link).
Acknowledgement sent
to pukkamustard <pukkamustard@posteo.net>
:
New bug report received and forwarded. Copy sent to guix-patches@gnu.org
.
(Thu, 16 Dec 2021 16:18:02 GMT) (full text, mbox, link).
Message #5 received at submit@debbugs.gnu.org (full text, mbox, reply):
Hello Guix, This is an initial patch and proposal towards decentralizing substitute distribution with ERIS. ERIS (Encoding for Robust Immutable Storage) [1] is an encoding of content into uniformly sized, encryped and content-addressed blocks. The original content can be reconstructed only with access to a read capability, which can be encoded as an URN. One key advantage of ERIS is that the encoding is protocol agnostic. Any protocol that can transfer small (32KiB) sized blocks referenced by the hash of their content will do. This can be done with things such as GNUNet, IPFS, OpenDHT, HTTP or a USB stick on a bicycle. The following patch allows substitutes to be published over IPFS using ERIS. This is inspired and very similar to previous work on distributing substitutes over IPFS [2]. The narinfos served by `guix publish` look like this: --8<---------------cut here---------------start------------->8--- StorePath: /gnu/store/81bdcd5x4v50i28h98bfkvvkx9cky63w-hello-2.10 URL: nar/gzip/81bdcd5x4v50i28h98bfkvvkx9cky63w-hello-2.10 Compression: gzip FileSize: 67363 ERIS: urn:erisx2:BIBC2LUTIQH43S2KRIAV7TBXNUUVPZTMV6KFA2M7AL5V6FNE77VNUDDVDAGJUEEAFATVO2QQT67SMOPTO3LGWCJFU7BZVCF5VXEQQW25BE URL: nar/zstd/81bdcd5x4v50i28h98bfkvvkx9cky63w-hello-2.10 Compression: zstd FileSize: 64917 ERIS: urn:erisx2:BIBO7KS7SAWHDNC43DVILOSQ3F3SRRHEV6YPLDCSZ7MMD6LZVCHQMEQ6FUBTJAPSNFF7XR5XPTP4OQ72OPABNEO7UYBUN42O46ARKHBTGM NarHash: sha256:1sagsz1mnlqkr8r8s6gwkzvvhq619rlzhpbxl3h0b111n5hn2w9w NarSize: 220704 References: 2fk1gz2s7ppdicynscra9b19byrrr866-glibc-2.33 81bdcd5x4v50i28h98bfkvvkx9cky63w-hello-2.10 90lbavffg0csrf208nw0ayj1bz5knl47-gcc-10.3.0-lib Deriver: 260bk0ch4np4h2yz5yqhf8hjbsyhwpmr-hello-2.10.drv Signature: 1;strawberry;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 --8<---------------cut here---------------end--------------->8--- For every compressed nar the ERIS URN is computed and added. If the `--ipfs` is used for `guix publish` then the encoded blocks are also uploaded to the IPFS daemon. The nar could then be retrieved from anywhere like this: --8<---------------cut here---------------start------------->8--- (use-modules (eris) (eris blocks ipfs)) (eris-decode->bytevector "urn:erisx2:BIBC2LUTIQH43S2KRIAV7TBXNUUVPZTMV6KFA2M7AL5V6FNE77VNUDDVDAGJUEEAFATVO2QQT67SMOPTO3LGWCJFU7BZVCF5VXEQQW25BE" eris-blocks-ipfs-ref) --8<---------------cut here---------------end--------------->8--- These patches do not yet retrieve content from IPFS (TODO). But in principle, anybody connected to IPFS can get the nar with the ERIS URN. This could be used to reduce load on substitute server as they would only need to publish the ERIS URN directly - substitutes could be delivered much more peer-to-peer. Other transports that I have been looking in to and am pretty sure will work include: HTTP (with RFC 2169 [3]), GNUNet, OpenDHT. This is, imho, the advantage of ERIS over IPFS directly or GNUNet directly. The encoding and identifiers (URN) are abstracted away from specific transports (and also applications). ERIS is almost exactly the same encoding as used in GNUNet (ECRS). Blocks can be stored in any kind of databases (see for example the GDBM bindings [4]). A tricky things is figuring out how to multiplex all these different transports and storages... The ERIS specification is still considered "experimental". However we feel confident to stabilize it and intend to do so around February/March 2022 with a release 1.0.0 of the specification. This will ensure that the identifiers remain stable for the forseeable future (until the crypto breaks). Before that there is also a small external security audit of the specification planned (thanks to NGI0/NLnet!). This is just a little demo of the idea and some food for thought and discussion. Give it a try and let me know what you think! I've also pushed the patches to my personal Guix mirror if you want to check it out from there: https://inqlab.net/git/guix.git/log/?h=wip-eris Also CCing ~pukkamustard/eris@lists.sr.ht where there is some general ERIS related discussion. Thanks, -pukkamustard [1] http://purl.org/eris [2] https://issues.guix.gnu.org/33899 [3] https://www.ietf.org/rfc/rfc2169.txt [4] https://inqlab.net/git/guile-eris.git/tree/eris/blocks/gdbm.scm pukkamustard (3): publish: Add ERIS URN to narinfo WIP: gnu: guile-eris: Update to unreleased git version. publish: Add IPFS support. configure.ac | 5 ++ gnu/packages/guile-xyz.scm | 10 ++-- gnu/packages/package-management.scm | 1 + guix/narinfo.scm | 10 ++-- guix/scripts/publish.scm | 79 ++++++++++++++++++++++------- 5 files changed, 79 insertions(+), 26 deletions(-) -- 2.34.0
Information forwarded
to guix-patches@gnu.org
:
bug#52555
; Package guix-patches
.
(Thu, 16 Dec 2021 16:21:02 GMT) (full text, mbox, link).
Message #8 received at 52555@debbugs.gnu.org (full text, mbox, reply):
* guix/scripts/publish.scm: (bake-narinfo+nar): Compute ERIS URN of compressed nars. (narinfo-string): Add #:eris-urns parameter and honor it. (store-item->recutils): Add #:eris-urn parameter and honor it. * guix/scripts/narinfo.scm: (<narinfo>)[eris-urns]: New field. (narinfo-maker): Handle ERIS URN. * configure.ac: (HAVE_GUILE_ERIS): New conditional. * gnu/packages/package-management.scm: (guix)[native-inputs]: Add guile-eris. --- configure.ac | 5 +++++ gnu/packages/package-management.scm | 1 + guix/narinfo.scm | 10 ++++++---- guix/scripts/publish.scm | 31 +++++++++++++++++++++-------- 4 files changed, 35 insertions(+), 12 deletions(-) diff --git a/configure.ac b/configure.ac index 341cff8fbd..72396be8aa 100644 --- a/configure.ac +++ b/configure.ac @@ -170,6 +170,11 @@ GUILE_MODULE_AVAILABLE([have_guile_avahi], [(avahi)]) AM_CONDITIONAL([HAVE_GUILE_AVAHI], [test "x$have_guile_avahi" = "xyes"]) +dnl Check for Guile-eris. +GUILE_MODULE_AVAILABLE([have_guile_eris], [(eris)]) +AM_CONDITIONAL([HAVE_GUILE_ERIS], + [test "x$have_guile_eris" = "xyes"]) + dnl Guile-newt is used by the graphical installer. GUILE_MODULE_AVAILABLE([have_guile_newt], [(newt)]) diff --git a/gnu/packages/package-management.scm b/gnu/packages/package-management.scm index 9496499850..5c49167782 100644 --- a/gnu/packages/package-management.scm +++ b/gnu/packages/package-management.scm @@ -394,6 +394,7 @@ (define code ("guile-zstd" ,guile-zstd) ("guile-ssh" ,guile-ssh) ("guile-git" ,guile-git) + ("guile-eris" ,guile-eris) ;; XXX: Keep the development inputs here even though ;; they're unnecessary, just so that 'guix environment diff --git a/guix/narinfo.scm b/guix/narinfo.scm index 4fc550aa6c..0972ede3c1 100644 --- a/guix/narinfo.scm +++ b/guix/narinfo.scm @@ -67,13 +67,14 @@ (define-module (guix narinfo) equivalent-narinfo?)) (define-record-type <narinfo> - (%make-narinfo path uri-base uris compressions file-sizes file-hashes - nar-hash nar-size references deriver system + (%make-narinfo path uri-base uris eris-urns compressions file-sizes + file-hashes nar-hash nar-size references deriver system signature contents) narinfo? (path narinfo-path) (uri-base narinfo-uri-base) ;URI of the cache it originates from (uris narinfo-uris) ;list of strings + (eris-urns narinfo-eris-urns) ;list of (strings | #f) (compressions narinfo-compressions) ;list of strings (file-sizes narinfo-file-sizes) ;list of (integers | #f) (file-hashes narinfo-file-hashes) @@ -134,7 +135,7 @@ (define (narinfo-signature->canonical-sexp str) (define (narinfo-maker str cache-url) "Return a narinfo constructor for narinfos originating from CACHE-URL. STR must contain the original contents of a narinfo file." - (lambda (path urls compressions file-hashes file-sizes + (lambda (path urls eris-urns compressions file-hashes file-sizes nar-hash nar-size references deriver system signature) "Return a new <narinfo> object." @@ -148,6 +149,7 @@ (define len (length urls)) (string-append cache-url url) (string-append cache-url "/" url))))) urls) + eris-urns compressions (match file-sizes (() (make-list len #f)) @@ -186,7 +188,7 @@ (define* (read-narinfo port #:optional url "FileHash" "FileSize" "NarHash" "NarSize" "References" "Deriver" "System" "Signature") - '("URL" "Compression" "FileSize" "FileHash")))) + '("URL" "ERIS" "Compression" "FileSize" "FileHash")))) (define (narinfo-sha256 narinfo) "Return the sha256 hash of NARINFO as a bytevector, or #f if NARINFO lacks a diff --git a/guix/scripts/publish.scm b/guix/scripts/publish.scm index 6e2b4368da..8e4b90789b 100644 --- a/guix/scripts/publish.scm +++ b/guix/scripts/publish.scm @@ -58,6 +58,7 @@ (define-module (guix scripts publish) #:use-module (guix workers) #:use-module (guix store) #:use-module ((guix serialization) #:select (write-file)) + #:use-module (eris) #:use-module (zlib) #:autoload (lzlib) (call-with-lzip-output-port make-lzip-output-port) @@ -308,7 +309,7 @@ (define* (store-item->recutils store-item #:key (nar-path "nar") (compression %no-compression) - file-size) + file-size eris-urn) "Return the 'Compression' and 'URL' fields of the narinfo for STORE-ITEM, with COMPRESSION, starting at NAR-PATH." (let ((url (encode-and-join-uri-path @@ -319,19 +320,22 @@ (define* (store-item->recutils store-item (($ <compression> type) (list (symbol->string type)))) ,(basename store-item))))) - (format #f "URL: ~a~%Compression: ~a~%~@[FileSize: ~a~%~]" - url (compression-type compression) file-size))) + (format #f "URL: ~a~%Compression: ~a~%~@[FileSize: ~a~%~]~@[ERIS: ~a~%~]" + url (compression-type compression) file-size eris-urn))) (define* (narinfo-string store store-path #:key (compressions (list %no-compression)) - (nar-path "nar") (file-sizes '())) + (nar-path "nar") (file-sizes '()) (eris-urns '())) "Generate a narinfo key/value string for STORE-PATH; an exception is raised if STORE-PATH is invalid. Produce a URL that corresponds to COMPRESSION. The narinfo is signed with KEY. NAR-PATH specifies the prefix for nar URLs. Optionally, FILE-SIZES is a list of compression/integer pairs, where the integer is size in bytes of the compressed NAR; it informs the client of how -much needs to be downloaded." +much needs to be downloaded. + +Optionally, ERIS-URNS is a list of compression/string pairs, where the +string is the ERIS URN of the compressed NAR." (let* ((path-info (query-path-info store store-path)) (compressions (actual-compressions store-path compressions)) (hash (bytevector->nix-base32-string @@ -352,9 +356,12 @@ (define* (narinfo-string store store-path store-path (map (lambda (compression) (let ((size (assoc-ref file-sizes - compression))) + compression)) + (eris-urn (assoc-ref eris-urns + compression))) (store-item->recutils store-path #:file-size size + #:eris-urn eris-urn #:nar-path nar-path #:compression compression))) @@ -632,6 +639,12 @@ (define (compressed-nar-size compression) (and stat (cons compression (stat:size stat))))) + (define (compressed-eris-urn compression) + (let* ((nar (nar-cache-file cache item #:compression compression)) + (stat (stat nar #f))) + (and stat + (cons compression (call-with-input-file nar eris-encode->urn))))) + (let ((compression (actual-compressions item compressions))) (for-each (cut compress-nar cache item <>) compressions) @@ -646,11 +659,13 @@ (define (compressed-nar-size compression) ;; thread's connection to the store since we would end up sending ;; stuff concurrently on the same channel. (with-store store - (let ((sizes (filter-map compressed-nar-size compression))) + (let ((sizes (filter-map compressed-nar-size compression)) + (eris-urns (filter-map compressed-eris-urn compression))) (display (narinfo-string store item #:nar-path nar-path #:compressions compressions - #:file-sizes sizes) + #:file-sizes sizes + #:eris-urns eris-urns) port))) ;; Make the cached narinfo world-readable, contrary to what -- 2.34.0
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to guix-patches@gnu.org
:
bug#52555
; Package guix-patches
.
(Thu, 16 Dec 2021 16:21:02 GMT) (full text, mbox, link).
Message #11 received at 52555@debbugs.gnu.org (full text, mbox, reply):
* gnu/packages/guile-xyz.schm (guile-eris): Update to unreleased git version. [source]: Update source URI. [propagated-inputs]: Add guile-json-4 and guile-gdbm-ffi. --- gnu/packages/guile-xyz.scm | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/gnu/packages/guile-xyz.scm b/gnu/packages/guile-xyz.scm index 8346d99996..5e6f31a6e2 100644 --- a/gnu/packages/guile-xyz.scm +++ b/gnu/packages/guile-xyz.scm @@ -4325,15 +4325,15 @@ (define-public guile-sodium (define-public guile-eris (package (name "guile-eris") - (version "0.2.0") + (version "f1e4dd87988f9a80b05a8051d7f5ba3daf79dcc1") (source (origin (method git-fetch) (uri (git-reference - (url "https://inqlab.net/git/eris.git") - (commit (string-append "v" version)))) + (url "https://inqlab.net/git/guile-eris.git") + (commit version))) (file-name (git-file-name name version)) - (sha256 (base32 "1ijglmwkdy1l87gj429qfjis0v8b1zlxhbyfhx5za8664h68nqka")))) + (sha256 (base32 "0kgm4b4qn2s74wjvxy273gdi1l1m81i2k4kkk1zc6vlcg3np7p06")))) (build-system gnu-build-system) (arguments '()) (native-inputs @@ -4345,7 +4345,7 @@ (define-public guile-eris guile-srfi-180)) (inputs (list guile-3.0)) (propagated-inputs - (list guile-sodium)) + (list guile-sodium guile-json-4 guile-gdbm-ffi)) (synopsis "Guile implementation of the Encoding for Robust Immutable Storage (ERIS)") (description "Guile-ERIS is the reference implementation of the Encoding for Robust -- 2.34.0
Information forwarded
to guix-patches@gnu.org
:
bug#52555
; Package guix-patches
.
(Thu, 16 Dec 2021 16:21:02 GMT) (full text, mbox, link).
Message #14 received at 52555@debbugs.gnu.org (full text, mbox, reply):
* guix/scripts/publish.scm: (show-help, %options): Add '--ipfs'. (render-narinfo/cached, bake-narinfo+nar, make-request-handler, run-publish-server): Add #:ipfs? and honor it. (guix-publish): Honor '--ipfs' and parameterize %ipfs-base-url. --- guix/scripts/publish.scm | 52 +++++++++++++++++++++++++++++++--------- 1 file changed, 41 insertions(+), 11 deletions(-) diff --git a/guix/scripts/publish.scm b/guix/scripts/publish.scm index 8e4b90789b..8e7fb47b9e 100644 --- a/guix/scripts/publish.scm +++ b/guix/scripts/publish.scm @@ -41,6 +41,8 @@ (define-module (guix scripts publish) #:use-module (srfi srfi-26) #:use-module (srfi srfi-34) #:use-module (srfi srfi-37) + #:use-module (srfi srfi-71) + #:use-module (srfi srfi-171) #:use-module (web http) #:use-module (web request) #:use-module (web response) @@ -52,6 +54,7 @@ (define-module (guix scripts publish) #:use-module (guix base64) #:use-module (guix config) #:use-module (guix derivations) + #:use-module ((guix ipfs) #:prefix ipfs:) #:use-module (gcrypt hash) #:use-module (guix pki) #:use-module (gcrypt pk-crypto) @@ -59,6 +62,8 @@ (define-module (guix scripts publish) #:use-module (guix store) #:use-module ((guix serialization) #:select (write-file)) #:use-module (eris) + #:use-module (eris read-capability) + #:use-module (eris blocks ipfs) #:use-module (zlib) #:autoload (lzlib) (call-with-lzip-output-port make-lzip-output-port) @@ -83,6 +88,7 @@ (define-module (guix scripts publish) run-publish-server guix-publish)) + (define (show-help) (format #t (G_ "Usage: guix publish [OPTION]... Publish ~a over HTTP.\n") %store-directory) @@ -102,6 +108,8 @@ (define (show-help) (display (G_ " --cache-bypass-threshold=SIZE serve store items below SIZE even when not cached")) + (display (G_ " + --ipfs[=GATEWAY] publish items over IPFS via GATEWAY")) (display (G_ " --workers=N use N workers to bake items")) (display (G_ " @@ -220,6 +228,10 @@ (define %options (lambda (opt name arg result) (alist-cons 'cache-bypass-threshold (size->number arg) result))) + (option '("ipfs") #f #t + (lambda (opt name arg result) + (alist-cons 'ipfs (or arg (ipfs:%ipfs-base-url)) + result))) (option '("workers") #t #f (lambda (opt name arg result) (alist-cons 'workers (string->number* arg) @@ -526,7 +538,7 @@ (define (bypass-cache? store item) (define* (render-narinfo/cached store request hash #:key ttl (compressions (list %no-compression)) (nar-path "nar") negative-ttl - cache pool) + cache pool ipfs?) "Respond to the narinfo request for REQUEST. If the narinfo is available in CACHE, then send it; otherwise, return 404 and \"bake\" that nar and narinfo requested using POOL." @@ -571,7 +583,8 @@ (define (delete-entry narinfo) (bake-narinfo+nar cache item #:ttl ttl #:compressions compressions - #:nar-path nar-path))) + #:nar-path nar-path + #:ipfs? ipfs?))) (when ttl (single-baker 'cache-cleanup @@ -631,7 +644,7 @@ (define (write-compressed-file call-with-compressed-output-port) (define* (bake-narinfo+nar cache item #:key ttl (compressions (list %no-compression)) - (nar-path "/nar")) + (nar-path "/nar") ipfs?) "Write the narinfo and nar for ITEM to CACHE." (define (compressed-nar-size compression) (let* ((nar (nar-cache-file cache item #:compression compression)) @@ -641,9 +654,19 @@ (define (compressed-nar-size compression) (define (compressed-eris-urn compression) (let* ((nar (nar-cache-file cache item #:compression compression)) - (stat (stat nar #f))) + (stat (stat nar #f)) + (block-reducer (if ipfs? + (eris-blocks-ipfs-reducer + #:ipfs-base-url (ipfs:%ipfs-base-url)) + rcount))) (and stat - (cons compression (call-with-input-file nar eris-encode->urn))))) + (cons compression + (call-with-input-file nar + (lambda (port) + (let ((read-cap _ + (eris-encode port #:block-reducer + block-reducer))) + (read-capability->string read-cap)))))))) (let ((compression (actual-compressions item compressions))) @@ -1115,7 +1138,8 @@ (define* (make-request-handler store cache pool narinfo-ttl narinfo-negative-ttl (nar-path "nar") - (compressions (list %no-compression))) + (compressions (list %no-compression)) + ipfs?) (define compression-type? string->compression-type) @@ -1147,7 +1171,8 @@ (define (handle request body) #:ttl narinfo-ttl #:negative-ttl narinfo-negative-ttl #:nar-path nar-path - #:compressions compressions) + #:compressions compressions + #:ipfs? ipfs?) (render-narinfo store request hash #:ttl narinfo-ttl #:negative-ttl narinfo-negative-ttl @@ -1218,7 +1243,7 @@ (define* (run-publish-server socket store advertise? port (compressions (list %no-compression)) (nar-path "nar") narinfo-ttl narinfo-negative-ttl - cache pool) + cache pool ipfs?) (when advertise? (let ((name (service-name))) ;; XXX: Use a callback from Guile-Avahi here, as Avahi can pick a @@ -1234,7 +1259,8 @@ (define* (run-publish-server socket store #:nar-path nar-path #:narinfo-ttl narinfo-ttl #:narinfo-negative-ttl narinfo-negative-ttl - #:compressions compressions) + #:compressions compressions + #:ipfs? ipfs?) concurrent-http-server `(#:socket ,socket))) @@ -1296,6 +1322,8 @@ (define-command (guix-publish . args) (repl-port (assoc-ref opts 'repl)) (cache (assoc-ref opts 'cache)) (workers (assoc-ref opts 'workers)) + (ipfs (assoc-ref opts 'ipfs)) + (ipfs? (if ipfs #t #f)) ;; Read the key right away so that (1) we fail early on if we can't ;; access them, and (2) we can then drop privileges. @@ -1315,7 +1343,8 @@ (define-command (guix-publish . args) (%private-key private-key) (cache-bypass-threshold (or (assoc-ref opts 'cache-bypass-threshold) - (cache-bypass-threshold)))) + (cache-bypass-threshold))) + (ipfs:%ipfs-base-url ipfs)) (info (G_ "publishing ~a on ~a, port ~d~%") %store-directory (inet-ntop (sockaddr:fam address) (sockaddr:addr address)) @@ -1344,7 +1373,8 @@ (define-command (guix-publish . args) #:nar-path nar-path #:compressions compressions #:narinfo-negative-ttl negative-ttl - #:narinfo-ttl ttl)))))) + #:narinfo-ttl ttl + #:ipfs? ipfs?)))))) ;;; Local Variables: ;;; eval: (put 'single-baker 'scheme-indent-function 1) -- 2.34.0
Severity set to 'important' from 'normal'
Request was from Ludovic Courtès <ludo@gnu.org>
to control@debbugs.gnu.org
.
(Sat, 18 Dec 2021 20:02:02 GMT) (full text, mbox, link).
Information forwarded
to guix-patches@gnu.org
:
bug#52555
; Package guix-patches
.
(Mon, 20 Dec 2021 16:26:02 GMT) (full text, mbox, link).
Message #19 received at 52555@debbugs.gnu.org (full text, mbox, reply):
Hi pukkamustard, pukkamustard <pukkamustard@posteo.net> skribis: > This is an initial patch and proposal towards decentralizing substitute > distribution with ERIS. Woohoo, sounds exciting! > ERIS (Encoding for Robust Immutable Storage) [1] is an encoding of content into > uniformly sized, encryped and content-addressed blocks. The original content > can be reconstructed only with access to a read capability, which can be > encoded as an URN. > > One key advantage of ERIS is that the encoding is protocol agnostic. Any > protocol that can transfer small (32KiB) sized blocks referenced by the hash of > their content will do. This can be done with things such as GNUNet, IPFS, > OpenDHT, HTTP or a USB stick on a bicycle. Yes, that’s nice. > The following patch allows substitutes to be published over IPFS using ERIS. > This is inspired and very similar to previous work on distributing substitutes > over IPFS [2]. > > The narinfos served by `guix publish` look like this: > > StorePath: /gnu/store/81bdcd5x4v50i28h98bfkvvkx9cky63w-hello-2.10 > URL: nar/gzip/81bdcd5x4v50i28h98bfkvvkx9cky63w-hello-2.10 > Compression: gzip > FileSize: 67363 > ERIS: urn:erisx2:BIBC2LUTIQH43S2KRIAV7TBXNUUVPZTMV6KFA2M7AL5V6FNE77VNUDDVDAGJUEEAFATVO2QQT67SMOPTO3LGWCJFU7BZVCF5VXEQQW25BE > URL: nar/zstd/81bdcd5x4v50i28h98bfkvvkx9cky63w-hello-2.10 > Compression: zstd > FileSize: 64917 > ERIS: urn:erisx2:BIBO7KS7SAWHDNC43DVILOSQ3F3SRRHEV6YPLDCSZ7MMD6LZVCHQMEQ6FUBTJAPSNFF7XR5XPTP4OQ72OPABNEO7UYBUN42O46ARKHBTGM Do we really need one URN per compression method? Couldn’t we leave compression (of individual chunks, possibly) as a “detail” handled by the encoding or the transport layer? > If the `--ipfs` is used for `guix publish` then the encoded blocks are also > uploaded to the IPFS daemon. The nar could then be retrieved from anywhere like > this: > > (use-modules (eris) > (eris blocks ipfs)) > > (eris-decode->bytevector > "urn:erisx2:BIBC2LUTIQH43S2KRIAV7TBXNUUVPZTMV6KFA2M7AL5V6FNE77VNUDDVDAGJUEEAFATVO2QQT67SMOPTO3LGWCJFU7BZVCF5VXEQQW25BE" > eris-blocks-ipfs-ref) > > These patches do not yet retrieve content from IPFS (TODO). But in principle, > anybody connected to IPFS can get the nar with the ERIS URN. This could be used > to reduce load on substitute server as they would only need to publish the ERIS > URN directly - substitutes could be delivered much more peer-to-peer. Nice. So adjusting ‘guix substitute’ should be relatively easy? > Other transports that I have been looking in to and am pretty sure will work > include: HTTP (with RFC 2169 [3]), GNUNet, OpenDHT. This is, imho, the > advantage of ERIS over IPFS directly or GNUNet directly. The encoding and > identifiers (URN) are abstracted away from specific transports (and also > applications). ERIS is almost exactly the same encoding as used in GNUNet > (ECRS). As a first step, ‘guix publish’ could implement RFC 2169, too. I gather implementing the HTTP and IPFS backends in ‘guix substitute’ should be relatively easy, right? > Blocks can be stored in any kind of databases (see for example the GDBM > bindings [4]). > > A tricky things is figuring out how to multiplex all these different > transports and storages... Yes. We don’t know yet what performance and data availability will be like on IPFS, for instance, so it’s important for users to be able to set priorities. It’s also important to gracefully fall back to direct HTTP downloads when fancier p2p methods fail, regardless of how they fail. > The ERIS specification is still considered "experimental". However we feel > confident to stabilize it and intend to do so around February/March 2022 with a > release 1.0.0 of the specification. This will ensure that the identifiers > remain stable for the forseeable future (until the crypto breaks). Before that > there is also a small external security audit of the specification planned > (thanks to NGI0/NLnet!). Neat. This is all very exciting. I look forward to playing around with it! Ludo’.
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(Thu, 23 Dec 2021 12:19:02 GMT) (full text, mbox, link).
Message #22 received at 52555@debbugs.gnu.org (full text, mbox, reply):
Hi Ludo, Thanks for your comments! Ludovic Courtès <ludo@gnu.org> writes: >> StorePath: /gnu/store/81bdcd5x4v50i28h98bfkvvkx9cky63w-hello-2.10 >> URL: nar/gzip/81bdcd5x4v50i28h98bfkvvkx9cky63w-hello-2.10 >> Compression: gzip >> FileSize: 67363 >> ERIS: urn:erisx2:BIBC2LUTIQH43S2KRIAV7TBXNUUVPZTMV6KFA2M7AL5V6FNE77VNUDDVDAGJUEEAFATVO2QQT67SMOPTO3LGWCJFU7BZVCF5VXEQQW25BE >> URL: nar/zstd/81bdcd5x4v50i28h98bfkvvkx9cky63w-hello-2.10 >> Compression: zstd >> FileSize: 64917 >> ERIS: urn:erisx2:BIBO7KS7SAWHDNC43DVILOSQ3F3SRRHEV6YPLDCSZ7MMD6LZVCHQMEQ6FUBTJAPSNFF7XR5XPTP4OQ72OPABNEO7UYBUN42O46ARKHBTGM > > Do we really need one URN per compression method? Couldn’t we leave > compression (of individual chunks, possibly) as a “detail” handled by > the encoding or the transport layer? > I agree that it would be nice to leave this to the encoding layer as that would allow certain optimizations (e.g. de-duplication). Unfortunately, we haven't figured out yet what the most suitable compression/format would be. Something like EROSFS seems good (as it aligns data to fixed block sizes) [1]. But this seems a bit "clunky" for just an archive format and there do not seem to be any libraries that we could use to neatly integrate. It seems possible to block-align a Tar archive, but that seems a bit hackey [2]. Other things to look into might be Tarlz [3] and ZPAQ [4]. To get started I suggest just using one of the compressions/formats already in Guix. zstd seems to be a reasonable choice (for the same reasons why it makes sense to use zstd with `--discover` [5]). Does that sound like a plan? [1] https://inqlab.net/git/guile-eris.git/tree/examples/dedup-fs/Readme.org [2] https://unix.stackexchange.com/questions/276908/make-tar-or-other-archive-with-data-block-aligned-like-in-original-files-for/279384#279384 [3] http://lzip.nongnu.org/tarlz.html [4] http://mattmahoney.net/dc/zpaq.html [5] https://guix.gnu.org/en/blog/2021/getting-bytes-to-disk-more-quickly/ >> If the `--ipfs` is used for `guix publish` then the encoded blocks are also >> uploaded to the IPFS daemon. The nar could then be retrieved from anywhere like >> this: >> >> (use-modules (eris) >> (eris blocks ipfs)) >> >> (eris-decode->bytevector >> "urn:erisx2:BIBC2LUTIQH43S2KRIAV7TBXNUUVPZTMV6KFA2M7AL5V6FNE77VNUDDVDAGJUEEAFATVO2QQT67SMOPTO3LGWCJFU7BZVCF5VXEQQW25BE" >> eris-blocks-ipfs-ref) >> >> These patches do not yet retrieve content from IPFS (TODO). But in principle, >> anybody connected to IPFS can get the nar with the ERIS URN. This could be used >> to reduce load on substitute server as they would only need to publish the ERIS >> URN directly - substitutes could be delivered much more peer-to-peer. > > Nice. So adjusting ‘guix substitute’ should be relatively easy? Yes, relatively! :) I meant to send in a V2 that does this before going on holidays, but I'm afraid I won't make it. V2 will come in early January! >> Other transports that I have been looking in to and am pretty sure will work >> include: HTTP (with RFC 2169 [3]), GNUNet, OpenDHT. This is, imho, the >> advantage of ERIS over IPFS directly or GNUNet directly. The encoding and >> identifiers (URN) are abstracted away from specific transports (and also >> applications). ERIS is almost exactly the same encoding as used in GNUNet >> (ECRS). > > As a first step, ‘guix publish’ could implement RFC 2169, too. > > I gather implementing the HTTP and IPFS backends in ‘guix substitute’ > should be relatively easy, right? Yes, those seem to be the two easiest backends to implement. >> A tricky things is figuring out how to multiplex all these different >> transports and storages... > > Yes. We don’t know yet what performance and data availability will be > like on IPFS, for instance, so it’s important for users to be able to > set priorities. It’s also important to gracefully fall back to direct > HTTP downloads when fancier p2p methods fail, regardless of how they > fail. Agree. Thanks, -pukkamustard
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(Fri, 24 Dec 2021 14:49:01 GMT) (full text, mbox, link).
Message #25 received at 52555@debbugs.gnu.org (full text, mbox, reply):
Hi! pukkamustard <pukkamustard@posteo.net> skribis: > Ludovic Courtès <ludo@gnu.org> writes: > >>> StorePath: /gnu/store/81bdcd5x4v50i28h98bfkvvkx9cky63w-hello-2.10 >>> URL: nar/gzip/81bdcd5x4v50i28h98bfkvvkx9cky63w-hello-2.10 >>> Compression: gzip >>> FileSize: 67363 >>> ERIS: urn:erisx2:BIBC2LUTIQH43S2KRIAV7TBXNUUVPZTMV6KFA2M7AL5V6FNE77VNUDDVDAGJUEEAFATVO2QQT67SMOPTO3LGWCJFU7BZVCF5VXEQQW25BE >>> URL: nar/zstd/81bdcd5x4v50i28h98bfkvvkx9cky63w-hello-2.10 >>> Compression: zstd >>> FileSize: 64917 >>> ERIS: urn:erisx2:BIBO7KS7SAWHDNC43DVILOSQ3F3SRRHEV6YPLDCSZ7MMD6LZVCHQMEQ6FUBTJAPSNFF7XR5XPTP4OQ72OPABNEO7UYBUN42O46ARKHBTGM >> >> Do we really need one URN per compression method? Couldn’t we leave >> compression (of individual chunks, possibly) as a “detail” handled by >> the encoding or the transport layer? >> > > I agree that it would be nice to leave this to the encoding layer as > that would allow certain optimizations (e.g. de-duplication). > > Unfortunately, we haven't figured out yet what the most suitable > compression/format would be. Something like EROSFS seems good (as it > aligns data to fixed block sizes) [1]. But this seems a bit "clunky" for > just an archive format and there do not seem to be any libraries that we > could use to neatly integrate. It seems possible to block-align a Tar > archive, but that seems a bit hackey [2]. Other things to look into > might be Tarlz [3] and ZPAQ [4]. Yeah. Though it may be that deduplication at the block level doesn’t buy us much. That was the conclusion I reached a long time ago[a], and also seems to be supported by the recent guix-daemon deduplication improvements[b]. [a] https://hal.inria.fr/hal-00187069/en [b] https://issues.guix.gnu.org/24937#20-lineno0 > To get started I suggest just using one of the compressions/formats > already in Guix. zstd seems to be a reasonable choice (for the same > reasons why it makes sense to use zstd with `--discover` [5]). > > Does that sound like a plan? Sure! > I meant to send in a V2 that does this before going on holidays, but I'm > afraid I won't make it. V2 will come in early January! Alright, we’ll see! :-) Until then, enjoy your holidays! Ludo’.
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bug#52555
; Package guix-patches
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(Tue, 25 Jan 2022 19:23:02 GMT) (full text, mbox, link).
Message #28 received at 52555@debbugs.gnu.org (full text, mbox, reply):
Hello Guix, Here comes the V2 of a proposal towards decentralizing substitute distribution with ERIS. A quick summary (as this has become quite long): - This adds support for publishing and getting substitutes over IPFS. - By using the ERIS encoding we are not limited to using IPFS as transport. We can also use GNUNet, Named Data Networking (possibly) or just plain old HTTP. Support for these can be added in (guix eris). - These patches are still very rough and we need better logic for when to use IPFS et. al. and when to fallback to HTTP. - There might be performance issues when using IPFS via the IPFS daemon HTTP API. I found the setup for testing this a bit tricky. I will try and describe how I have been testing it. Please let me know how this can be improved! ** Authorize local substitutes We will be running a local substitute server so we need to add the local signing key to the list of authorized keys. In the system configurations: #+BEGIN_SRC scheme (modify-services %base-services (guix-service-type config => (guix-configuration (inherit config) (authorized-keys (cons* ;; allow substitutes from ourselves for testing purposes (local-file "/etc/signing-key.pub") %default-authorized-guix-keys))))) #+END_SRC ** Configure the local Guix checkout #+BEGIN_SRC shell ./bootstrap && ./configure --localstatedir=/var --sysconfdir=/etc #+END_SRC The ~--sysconfdir~ is required so that guix will use the ACL in ~/etc/guix/acl~. ** Start the IPFS daemon #+BEGIN_SRC shell guix shell go-ipfs -- ipfs daemon #+END_SRC Start a local substitute server: #+BEGIN_SRC shell sudo -E ./pre-inst-env guix publish --public-key=/etc/guix/signing-key.pub --private-key=/etc/guix/signing-key.sec --cache=/tmp/guix-publish-cache/ --port=8081 --compression=zstd:19 #+END_SRC We use port 8081 as IPFS is running on 8080. We use the temporary cache directory ~/tmp/guix-publish-cache~. ** Build some package locally First we build some package: #+BEGIN_SRC shell ./pre-inst-env guix build hello --no-substitutes --no-offload #+END_SRC #+RESULTS: : /gnu/store/khaaib6s836bk5kbik239hlk6n6ianc4-hello-2.11 ** Trigger the substitute server to "bake" a susbtitute #+BEGIN_SRC shell curl http://localhost:8081/khaaib6s836bk5kbik239hlk6n6ianc4.narinfo #+END_SRC --8<---------------cut here---------------start------------->8--- StorePath: /gnu/store/khaaib6s836bk5kbik239hlk6n6ianc4-hello-2.11 URL: nar/zstd/khaaib6s836bk5kbik239hlk6n6ianc4-hello-2.11 Compression: zstd NarHash: sha256:11pk3jsh4zk0gigyjk881ay1nnvjfgpd3xpb4rmbaljhbiis4jbm NarSize: 190480 References: 094bbaq6glba86h1d4cj16xhdi6fk2jl-gcc-10.3.0-lib 5h2w4qi9hk1qzzgi1w83220ydslinr4s-glibc-2.33 khaaib6s836bk5kbik239hlk6n6ianc4-hello-2.11 Deriver: mc7i1cdi42gy89mxl48nhdhgrfa9lpq6-hello-2.11.drv Signature: 1;strawberry;KHNpZ25hdHVyZSAKIChkYXRhIAogIChmbGFncyByZmM2OTc5KQogIChoYXNoIHNoYTI1NiAjOTE0QTVGNTE4NUZGRUIzMzc4QTEwMzgzQzdFMEU1NDI1MEUyREZDRjk1RDUwOTNCMzU4QTFBNDE4OUFBRDVGNCMpCiAgKQogKHNpZy12YWwgCiAgKGVjZHNhIAogICAociAjMDkxMDA2NDlCMkMyMzhEQzE2ODhFQTgyQTdCOEJFMTc5MTVBMjVDQjc1NzcwQjlGRkNGOTFDRTg2MDgyNzAwQiMpCiAgIChzICMwMUFBQ0VERjY0N0VENTQyRTIwNENDMEM1M0VDMEY0QjQ4QzdEOTAyRkFEQTkxREI4NzRGQjE2MTQ4QTIzNUI2IykKICAgKQogICkKIChwdWJsaWMta2V5IAogIChlY2MgCiAgIChjdXJ2ZSBFZDI1NTE5KQogICAocSAjMDRDMkY4ODk1QTU0NDNGNTlCODk2NDEwMEI1MDY0NzU4RjQ1N0YzMENEREE1MTQyQzE0MDc0NjExNTA1NTc5MCMpCiAgICkKICApCiApCg== --8<---------------cut here---------------end--------------->8--- If you do this again after a few seconds you will get a different response that has the ERIS URN and the FileSizes. The reason for this is that Guix publish bakes the nars asyncrhonisly in the background: #+BEGIN_SRC shell curl http://localhost:8081/khaaib6s836bk5kbik239hlk6n6ianc4.narinfo #+END_SRC #+RESULTS: --8<---------------cut here---------------start------------->8--- StorePath: /gnu/store/khaaib6s836bk5kbik239hlk6n6ianc4-hello-2.11 URL: nar/zstd/khaaib6s836bk5kbik239hlk6n6ianc4-hello-2.11 Compression: zstd FileSize: 57691 NarHash: sha256:11pk3jsh4zk0gigyjk881ay1nnvjfgpd3xpb4rmbaljhbiis4jbm NarSize: 190480 ERISFormat: application/x-nix-archive+zstd-19 ERIS: urn:erisx2:B4AYPTXLTACB6WJYJ74RKBCVU3RBLHA4PY6HATUWRZNJ6THVSDUFM34K2ASUF3B6EOYEEBRZ5XEUR4PAAAIED7G7YSEZVZ5V7WWZ2PSC7Q References: 094bbaq6glba86h1d4cj16xhdi6fk2jl-gcc-10.3.0-lib 5h2w4qi9hk1qzzgi1w83220ydslinr4s-glibc-2.33 khaaib6s836bk5kbik239hlk6n6ianc4-hello-2.11 Deriver: mc7i1cdi42gy89mxl48nhdhgrfa9lpq6-hello-2.11.drv Signature: 1;strawberry;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 --8<---------------cut here---------------end--------------->8--- These patches have added the ERIS and ERISFormat fields. Eventually we would have figured out what the best format for use over ERIS is, for now we encode it in the ERISFormat field. ** Removing a package from the store This is necessary in order to make guix look for a substitute. #+BEGIN_SRC shell ./pre-inst-env guix gc -D /gnu/store/khaaib6s836bk5kbik239hlk6n6ianc4-hello-2.11 #+END_SRC ** Start the Guix daemon from the repository #+BEGIN_SRC shell sudo -E ./pre-inst-env guix-daemon --build-users-group=guixbuild --debug --substitute-urls=http://localhost:8081/ #+END_SRC Note this will probably stop your system Guix daemon. Run ~sudo herd restart guix-daemon~ to restart it. #+BEGIN_SRC shell ./pre-inst-env guix build hello #+END_SRC --8<---------------cut here---------------start------------->8--- substituting /gnu/store/khaaib6s836bk5kbik239hlk6n6ianc4-hello-2.11... downloading from urn:erisx2:B4AYPTXLTACB6WJYJ74RKBCVU3RBLHA4PY6HATUWRZNJ6THVSDUFM34K2ASUF3B6EOYEEBRZ5XEUR4PAAAIED7G7YSEZVZ5V7WWZ2PSC7Q ... urn:erisx2:B4AYPTXLTACB6WJYJ74RKBCVU3RBLHA4PY6HATUWRZNJ6THVSDUFM34K2ASUF3B6EOYEEBRZ5XEUR4PAAAIED7G7YSEZVZ5V7WWZ2PSC7Q 502KiB/s 00:00 | 56KiB transferred /gnu/store/khaaib6s836bk5kbik239hlk6n6ianc4-hello-2.11 --8<---------------cut here---------------end--------------->8--- We have just retreived the substitute for the hello package from IPFS. Hello decentralized substitutes! I have only tested this for fairly small packages (up to a few MB). One issue with IPFS might be that we have to create a new HTTP connection to the IPFS daemon for every single block (32KiB). The IPFS daemon does not seem to support HTTP connection re-use and neither does the Guile (web client). I fear this might become a performance issue. It seems possible to use IPFS more directly by exposing the Go code as a C library and then using that with the Guile FFI [1]. This is however a bit complicated and adds a lot of dependencies. In particular, this should not become a dependency of Guix itself. The performance of IPFS itself also needs to be evaluated, maybe the IPFS HTTP API will not be the bottle-neck. As mentioned in previous mail a simple HTTP transport for blocks would be a good fallback. This would allow users to get missing blocks (things that somehow got dropped from IPFS) directly from a substitute server. This is different then getting the entire NAR from a substitute server. A user might be missing a single 32KiB block and should be able to get only that. However, such a HTTP fallback would also suffer from the one-connection-per-block issue. As part of general ERIS research we are investigating CoAP as a better fallback transport. In any case, it would be necessary for the substitute server to store encoded blocks of the NAR. For this I think it makes sense to use a small database. We have bindings to use ERIS with GDBM [2]. It might also make sense to use SQLite, especially if there are other use-cases for such a database. I will be looking into the HTTP fallback and also using BitTorrent and GNUNet as transports. Thanks for making it so far and happy hacking! -pukkamustard [1] https://github.com/scala-network/libipfs/ [2] https://codeberg.org/eris/guile-eris/src/branch/main/eris/blocks/gdbm.scm pukkamustard (5): WIP: gnu: guile-eris: Update to unreleased git version. publish: Add ERIS URN to narinfo Add (guix eris). publish: Add support for storing ERIS encoded blocks to IPFS. substitute: Fetch substitutes using ERIS. Makefile.am | 1 + configure.ac | 5 +++ gnu/packages/guile-xyz.scm | 10 ++--- gnu/packages/package-management.scm | 1 + guix/eris.scm | 60 +++++++++++++++++++++++++++++ guix/narinfo.scm | 14 +++++-- guix/scripts/publish.scm | 32 +++++++++++++-- guix/scripts/substitute.scm | 21 +++++++--- 8 files changed, 126 insertions(+), 18 deletions(-) create mode 100644 guix/eris.scm -- 2.34.0
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:
bug#52555
; Package guix-patches
.
(Tue, 25 Jan 2022 19:23:02 GMT) (full text, mbox, link).
Message #31 received at 52555@debbugs.gnu.org (full text, mbox, reply):
* guix/scripts/publish.scm: (bake-narinfo+nar): Compute ERIS URN of compressed nars. (narinfo-string): Add #:eris-urn parameter and honor it. * guix/scripts/narinfo.scm: (<narinfo>)[eris-format,eris-urn]: New fields. (narinfo-maker): Handle ERIS URN and ERIS format. * configure.ac: (HAVE_GUILE_ERIS): New conditional. * gnu/packages/package-management.scm: (guix)[native-inputs]: Add guile-eris. --- configure.ac | 5 +++++ gnu/packages/package-management.scm | 1 + guix/narinfo.scm | 14 ++++++++++---- guix/scripts/publish.scm | 24 ++++++++++++++++++++---- 4 files changed, 36 insertions(+), 8 deletions(-) diff --git a/configure.ac b/configure.ac index 341cff8fbd..72396be8aa 100644 --- a/configure.ac +++ b/configure.ac @@ -170,6 +170,11 @@ GUILE_MODULE_AVAILABLE([have_guile_avahi], [(avahi)]) AM_CONDITIONAL([HAVE_GUILE_AVAHI], [test "x$have_guile_avahi" = "xyes"]) +dnl Check for Guile-eris. +GUILE_MODULE_AVAILABLE([have_guile_eris], [(eris)]) +AM_CONDITIONAL([HAVE_GUILE_ERIS], + [test "x$have_guile_eris" = "xyes"]) + dnl Guile-newt is used by the graphical installer. GUILE_MODULE_AVAILABLE([have_guile_newt], [(newt)]) diff --git a/gnu/packages/package-management.scm b/gnu/packages/package-management.scm index 05795824b5..a9094b8b7f 100644 --- a/gnu/packages/package-management.scm +++ b/gnu/packages/package-management.scm @@ -404,6 +404,7 @@ (define code ("guile-zstd" ,guile-zstd) ("guile-ssh" ,guile-ssh) ("guile-git" ,guile-git) + ("guile-eris" ,guile-eris) ;; XXX: Keep the development inputs here even though ;; they're unnecessary, just so that 'guix environment diff --git a/guix/narinfo.scm b/guix/narinfo.scm index 4fc550aa6c..a6a5d3b84b 100644 --- a/guix/narinfo.scm +++ b/guix/narinfo.scm @@ -45,6 +45,8 @@ (define-module (guix narinfo) narinfo-file-sizes narinfo-hash narinfo-size + narinfo-eris-format + narinfo-eris-urn narinfo-references narinfo-deriver narinfo-system @@ -68,8 +70,8 @@ (define-module (guix narinfo) (define-record-type <narinfo> (%make-narinfo path uri-base uris compressions file-sizes file-hashes - nar-hash nar-size references deriver system - signature contents) + nar-hash nar-size eris-format eris-urn references deriver + system signature contents) narinfo? (path narinfo-path) (uri-base narinfo-uri-base) ;URI of the cache it originates from @@ -79,6 +81,8 @@ (define-record-type <narinfo> (file-hashes narinfo-file-hashes) (nar-hash narinfo-hash) (nar-size narinfo-size) + (eris-format narinfo-eris-format) + (eris-urn narinfo-eris-urn) (references narinfo-references) (deriver narinfo-deriver) (system narinfo-system) @@ -135,7 +139,7 @@ (define (narinfo-maker str cache-url) "Return a narinfo constructor for narinfos originating from CACHE-URL. STR must contain the original contents of a narinfo file." (lambda (path urls compressions file-hashes file-sizes - nar-hash nar-size references deriver system + nar-hash nar-size eris-format eris-urn references deriver system signature) "Return a new <narinfo> object." (define len (length urls)) @@ -157,6 +161,8 @@ (define len (length urls)) ((lst ...) (map string->number lst))) nar-hash (and=> nar-size string->number) + eris-format + (if eris-urn (string->uri eris-urn) #f) (string-tokenize references) (match deriver ((or #f "") #f) @@ -184,7 +190,7 @@ (define* (read-narinfo port #:optional url (narinfo-maker str url) '("StorePath" "URL" "Compression" "FileHash" "FileSize" "NarHash" "NarSize" - "References" "Deriver" "System" + "ERISFormat" "ERIS" "References" "Deriver" "System" "Signature") '("URL" "Compression" "FileSize" "FileHash")))) diff --git a/guix/scripts/publish.scm b/guix/scripts/publish.scm index 6e2b4368da..9c83f5183d 100644 --- a/guix/scripts/publish.scm +++ b/guix/scripts/publish.scm @@ -58,6 +58,7 @@ (define-module (guix scripts publish) #:use-module (guix workers) #:use-module (guix store) #:use-module ((guix serialization) #:select (write-file)) + #:use-module (eris) #:use-module (zlib) #:autoload (lzlib) (call-with-lzip-output-port make-lzip-output-port) @@ -146,6 +147,9 @@ (define %default-gzip-compression ;; Since we compress on the fly, default to fast compression. (compression 'gzip 3)) +(define %eris-zstd-compression + (compression 'zstd 19)) + (define (default-compression type) (compression type 3)) @@ -324,7 +328,8 @@ (define* (store-item->recutils store-item (define* (narinfo-string store store-path #:key (compressions (list %no-compression)) - (nar-path "nar") (file-sizes '())) + (nar-path "nar") (file-sizes '()) + eris-urn) "Generate a narinfo key/value string for STORE-PATH; an exception is raised if STORE-PATH is invalid. Produce a URL that corresponds to COMPRESSION. The narinfo is signed with KEY. NAR-PATH specifies the prefix for nar URLs. @@ -347,7 +352,7 @@ (define* (narinfo-string store store-path StorePath: ~a ~{~a~}\ NarHash: sha256:~a -NarSize: ~d +NarSize: ~d~@[~%ERISFormat: application/x-nix-archive+zstd-19~%ERIS: ~a~] References: ~a~%" store-path (map (lambda (compression) @@ -359,7 +364,7 @@ (define* (narinfo-string store store-path #:compression compression))) compressions) - hash size references)) + hash size eris-urn references)) ;; Do not render a "Deriver" line if we are rendering info for a ;; derivation. Also do not render a "System" line that would be ;; expensive to compute and is currently unused. @@ -632,6 +637,16 @@ (define (compressed-nar-size compression) (and stat (cons compression (stat:size stat))))) + (define (eris-encode-nar compressions) + (and (member %eris-zstd-compression compressions) + (let* ((nar (nar-cache-file cache item + #:compression %eris-zstd-compression)) + (stat (stat nar #f))) + (and stat + (call-with-input-file nar + (cut eris-encode->string <> + #:block-size %eris-block-size-large)))))) + (let ((compression (actual-compressions item compressions))) (for-each (cut compress-nar cache item <>) compressions) @@ -650,7 +665,8 @@ (define (compressed-nar-size compression) (display (narinfo-string store item #:nar-path nar-path #:compressions compressions - #:file-sizes sizes) + #:file-sizes sizes + #:eris-urn (eris-encode-nar compression)) port))) ;; Make the cached narinfo world-readable, contrary to what -- 2.34.0
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bug#52555
; Package guix-patches
.
(Tue, 25 Jan 2022 19:23:03 GMT) (full text, mbox, link).
Message #34 received at 52555@debbugs.gnu.org (full text, mbox, reply):
* guix/ipfs.scm: New file. * Makefile.am (MODULES): Add it. --- Makefile.am | 1 + guix/eris.scm | 55 +++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 56 insertions(+) create mode 100644 guix/eris.scm diff --git a/Makefile.am b/Makefile.am index a10aeb817b..7219386361 100644 --- a/Makefile.am +++ b/Makefile.am @@ -131,6 +131,7 @@ MODULES = \ guix/cve.scm \ guix/workers.scm \ guix/ipfs.scm \ + guix/eris.scm \ guix/build-system.scm \ guix/build-system/android-ndk.scm \ guix/build-system/ant.scm \ diff --git a/guix/eris.scm b/guix/eris.scm new file mode 100644 index 0000000000..163bbe05ac --- /dev/null +++ b/guix/eris.scm @@ -0,0 +1,55 @@ +;;; GNU Guix --- Functional package management for GNU +;;; Copyright © 2022 pukkamustard <pukkamustard@posteo.net> +;;; +;;; This file is part of GNU Guix. +;;; +;;; GNU Guix is free software; you can redistribute it and/or modify it +;;; under the terms of the GNU General Public License as published by +;;; the Free Software Foundation; either version 3 of the License, or (at +;;; your option) any later version. +;;; +;;; GNU Guix is distributed in the hope that it will be useful, but +;;; WITHOUT ANY WARRANTY; without even the implied warranty of +;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +;;; GNU General Public License for more details. +;;; +;;; You should have received a copy of the GNU General Public License +;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>. + +(define-module (guix eris) + #:use-module (eris) + #:use-module (eris blocks ipfs) + #:use-module (web client) + #:use-module (web response) + #:use-module (srfi srfi-71) + + #:export (guix-eris-block-reducer)) + +(define (ipfs-daemon-alive?) + "Attempt to connect to the IPFS daemon. Returns #t if the daemon is alive +and #f else." + (with-exception-handler + (const #f) + (lambda _ + (let ((response _ + (http-post (string-append (%ipfs-base-url) + "/api/v0/version")))) + (equal? 200 (response-code response)))) + #:unwind? #t)) + +(define guix-eris-block-reducer + (case-lambda + + ;; Check if IPFS Daemon is running. + (() (if (ipfs-daemon-alive?) + (eris-blocks-ipfs-reducer) + #f)) + + ;; Completion. Nothing to do. + ((_) #t) + + ((ipfs ref-block) + ;; If IPFS has been initialized store block there + (if ipfs + (eris-blocks-ipfs-reducer ipfs ref-block) + ipfs)))) -- 2.34.0
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bug#52555
; Package guix-patches
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(Tue, 25 Jan 2022 19:23:03 GMT) (full text, mbox, link).
Message #37 received at 52555@debbugs.gnu.org (full text, mbox, reply):
* guix/scripts/publish.scm (bake-narinfo+nar): Use guix-eris-block-reducer from (guix eris). --- guix/scripts/publish.scm | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/guix/scripts/publish.scm b/guix/scripts/publish.scm index 9c83f5183d..556107ab7d 100644 --- a/guix/scripts/publish.scm +++ b/guix/scripts/publish.scm @@ -41,6 +41,7 @@ (define-module (guix scripts publish) #:use-module (srfi srfi-26) #:use-module (srfi srfi-34) #:use-module (srfi srfi-37) + #:use-module (srfi srfi-71) #:use-module (web http) #:use-module (web request) #:use-module (web response) @@ -58,6 +59,7 @@ (define-module (guix scripts publish) #:use-module (guix workers) #:use-module (guix store) #:use-module ((guix serialization) #:select (write-file)) + #:use-module (guix eris) #:use-module (eris) #:use-module (zlib) #:autoload (lzlib) (call-with-lzip-output-port @@ -644,8 +646,14 @@ (define (eris-encode-nar compressions) (stat (stat nar #f))) (and stat (call-with-input-file nar - (cut eris-encode->string <> - #:block-size %eris-block-size-large)))))) + (lambda (port) + (let ((eris-urn _ + (eris-encode port + #:block-size + %eris-block-size-large + #:block-reducer + guix-eris-block-reducer))) + (uri->string eris-urn)))))))) (let ((compression (actual-compressions item compressions))) -- 2.34.0
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bug#52555
; Package guix-patches
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(Tue, 25 Jan 2022 19:23:03 GMT) (full text, mbox, link).
Message #40 received at 52555@debbugs.gnu.org (full text, mbox, reply):
* gnu/packages/guile-xyz.schm (guile-eris): Update to unreleased git version. [source]: Update source URI. [propagated-inputs]: Add guile-json-4 and guile-gdbm-ffi. --- gnu/packages/guile-xyz.scm | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/gnu/packages/guile-xyz.scm b/gnu/packages/guile-xyz.scm index e2cf793acc..66ac486a74 100644 --- a/gnu/packages/guile-xyz.scm +++ b/gnu/packages/guile-xyz.scm @@ -4374,15 +4374,15 @@ (define-public guile-sodium (define-public guile-eris (package (name "guile-eris") - (version "0.2.0") + (version "bcbbcbc88f3ec1f2fafcd034ce5b620516bff105") (source (origin (method git-fetch) (uri (git-reference - (url "https://inqlab.net/git/eris.git") - (commit (string-append "v" version)))) + (url "https://codeberg.org/eris/guile-eris") + (commit version))) (file-name (git-file-name name version)) - (sha256 (base32 "1ijglmwkdy1l87gj429qfjis0v8b1zlxhbyfhx5za8664h68nqka")))) + (sha256 (base32 "17v3h2hqx080739rl57nfradp5vlmy24fgqdxry1zal5z9d3i8sr")))) (build-system gnu-build-system) (arguments '()) (native-inputs @@ -4394,7 +4394,7 @@ (define-public guile-eris guile-srfi-180)) (inputs (list guile-3.0)) (propagated-inputs - (list guile-sodium)) + (list guile-sodium guile-json-4 guile-gdbm-ffi)) (synopsis "Guile implementation of the Encoding for Robust Immutable Storage (ERIS)") (description "Guile-ERIS is the reference implementation of the Encoding for Robust -- 2.34.0
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bug#52555
; Package guix-patches
.
(Tue, 25 Jan 2022 19:23:04 GMT) (full text, mbox, link).
Message #43 received at 52555@debbugs.gnu.org (full text, mbox, reply):
* guix/scripts/substitute.scm (process-substitution): Fetch substitutes using ERIS. * guix/eris.scm (guix-eris-block-ref): New procedure. --- guix/eris.scm | 7 ++++++- guix/scripts/substitute.scm | 21 ++++++++++++++++----- 2 files changed, 22 insertions(+), 6 deletions(-) diff --git a/guix/eris.scm b/guix/eris.scm index 163bbe05ac..0999564c1f 100644 --- a/guix/eris.scm +++ b/guix/eris.scm @@ -23,7 +23,8 @@ (define-module (guix eris) #:use-module (web response) #:use-module (srfi srfi-71) - #:export (guix-eris-block-reducer)) + #:export (guix-eris-block-reducer + guix-eris-block-ref)) (define (ipfs-daemon-alive?) "Attempt to connect to the IPFS daemon. Returns #t if the daemon is alive @@ -53,3 +54,7 @@ (define guix-eris-block-reducer (if ipfs (eris-blocks-ipfs-reducer ipfs ref-block) ipfs)))) + +(define (guix-eris-block-ref ref) + "Dereference a block for decoding ERIS content" + (eris-blocks-ipfs-ref ref)) diff --git a/guix/scripts/substitute.scm b/guix/scripts/substitute.scm index 908a8334a8..852264976e 100755 --- a/guix/scripts/substitute.scm +++ b/guix/scripts/substitute.scm @@ -62,6 +62,8 @@ (define-module (guix scripts substitute) #:use-module (srfi srfi-35) #:use-module (web uri) #:use-module (guix http-client) + #:use-module (guix eris) + #:use-module (eris) #:export (%allow-unauthenticated-substitutes? %reply-file-descriptor @@ -486,18 +488,27 @@ (define (fetch uri) #:port port #:keep-alive? #t #:buffered? #f))))) + (else - (leave (G_ "unsupported substitute URI scheme: ~a~%") - (uri->string uri))))) + (if (and (eris-read-capability? uri)) + (values (eris-decode->port uri + #:block-ref + guix-eris-block-ref) #f) + (leave (G_ "unsupported substitute URI scheme: ~a~%") + (uri->string uri)))))) + + (define* (best-uri narinfo #:key (eris? #f)) + (if (and eris? (narinfo-eris-urn narinfo)) + (values (narinfo-eris-urn narinfo) "zstd" #f) + (narinfo-best-uri narinfo #:fast-decompression? + %prefer-fast-decompression?))) (unless narinfo (leave (G_ "no valid substitute for '~a'~%") store-item)) (let-values (((uri compression file-size) - (narinfo-best-uri narinfo - #:fast-decompression? - %prefer-fast-decompression?))) + (best-uri narinfo #:eris? #t))) (unless print-build-trace? (format (current-error-port) (G_ "Downloading ~a...~%") (uri->string uri))) -- 2.34.0
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bug#52555
; Package guix-patches
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(Sat, 29 Jan 2022 21:01:02 GMT) (full text, mbox, link).
Message #46 received at 52555@debbugs.gnu.org (full text, mbox, reply):
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pukkamustard schreef op di 25-01-2022 om 19:21 [+0000]: > ** Authorize local substitutes > > We will be running a local substitute server so we need to add the > local > signing key to the list of authorized keys. In the system > configurations: > > #+BEGIN_SRC scheme > (modify-services %base-services > (guix-service-type config => [...])) > #+END_SRC > [...] > ** Start the IPFS daemon > > #+BEGIN_SRC shell > guix shell go-ipfs -- ipfs daemon > #+END_SRC There's an ipfs-service-type nowadays, so starting the daemon manually isn't required (if using Guix System). Greetings, Maxime.
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(Sat, 29 Jan 2022 21:09:01 GMT) (full text, mbox, link).
Message #49 received at 52555@debbugs.gnu.org (full text, mbox, reply):
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pukkamustard schreef op di 25-01-2022 om 19:21 [+0000]: > I will be looking into the HTTP fallback and also using BitTorrent and GNUNet > as transports. I have been writing a (Guile) Scheme port of GNUnet's client libraries (https://git.gnunet.org/gnunet-scheme.git/). Currently only NSE is supported, but I'm working on DHT. DHT search/put already works to a degree (see examples/web.scm), but there are plenty of sharp edges (see TODOs about disconnecting, reconnecting and stopping fibers, and see guix.scm for Guile bugs that are patched out and extra guile- fibers features). Tests are being written a edge cases will be addressed. Greetings, Maxime.
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(Sat, 29 Jan 2022 21:11:02 GMT) (full text, mbox, link).
Message #52 received at 52555@debbugs.gnu.org (full text, mbox, reply):
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pukkamustard schreef op di 25-01-2022 om 19:21 [+0000]: > +dnl Check for Guile-eris. > +GUILE_MODULE_AVAILABLE([have_guile_eris], [(eris)]) > +AM_CONDITIONAL([HAVE_GUILE_ERIS], > + [test "x$have_guile_eris" = "xyes"]) This could to be documented in (guix)Requirements. Greetings, Maxime.
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(Sat, 29 Jan 2022 21:16:01 GMT) (full text, mbox, link).
Message #55 received at 52555@debbugs.gnu.org (full text, mbox, reply):
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pukkamustard schreef op di 25-01-2022 om 19:21 [+0000]: > + (define (eris-encode-nar compressions) > + (and (member %eris-zstd-compression compressions) > + (let* ((nar (nar-cache-file cache item > + #:compression %eris-zstd-compression)) > + (stat (stat nar #f))) > + (and stat > + (call-with-input-file nar > + (cut eris-encode->string <> > + #:block-size %eris-block-size-large)))))) Why are exceptions turned into #f (in (stat nar #f))? Should this be done for all I/O errors, including, say, EOVERFLOW, ENOMEM or ENAMETOOLONG, or only for ENOENT? Is a race condition possible here? If so, maybe consider doing something like (catch 'system-error (lambda () (call-with-input-file ...)) (lambda exception (and it-is-a-ENOENT (apply throw exception)))) to avoid it? Greetings, Maxime.
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(Sat, 29 Jan 2022 21:24:02 GMT) (full text, mbox, link).
Message #58 received at 52555@debbugs.gnu.org (full text, mbox, reply):
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pukkamustard schreef op di 25-01-2022 om 19:21 [+0000]: > +(define (ipfs-daemon-alive?) > + "Attempt to connect to the IPFS daemon. Returns #t if the daemon is alive > +and #f else." > + (with-exception-handler > + (const #f) > + (lambda _ > + (let ((response _ > + (http-post (string-append (%ipfs-base-url) > + "/api/v0/version")))) > + (equal? 200 (response-code response)))) > + #:unwind? #t)) This should preferably only be catching exceptions indicating that the daemon is down (exceptions indicating 404s, or system-errors indicating network errors, ...). > + > +(define guix-eris-block-reducer > + (case-lambda > + > + ;; Check if IPFS Daemon is running. > + (() (if (ipfs-daemon-alive?) > + (eris-blocks-ipfs-reducer) > + #f)) > + > + ;; Completion. Nothing to do. > + ((_) #t) > + > + ((ipfs ref-block) > + ;; If IPFS has been initialized store block there > + (if ipfs > + (eris-blocks-ipfs-reducer ipfs ref-block) > + ipfs)))) This (ipfs-daemon-alive?) seems racy, although it's probably not. Can we do (define guix-eris-block-reducer (case-lambda (() (guard (c (oops-it-fails-because-the-daemon-cannot-be- contacted? c) #false) (eris-block-ipfs-reducer)) [...])) instead? (I don't think this will work as-is, because from the name and thunkiness, it would appear that eris-block-ipfs-reducer returns a procedure ... Greetings, Maxime.
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(Sat, 29 Jan 2022 21:25:01 GMT) (full text, mbox, link).
Message #61 received at 52555@debbugs.gnu.org (full text, mbox, reply):
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pukkamustard schreef op di 25-01-2022 om 19:21 [+0000]: > + #:use-module (eris) > + #:use-module (eris blocks ipfs) guile-eris is an optional dependency, so this needs to be autoloaded. Or guix/eris.scm must only be compiled when guile-eris is available. Greetings, Maxime.
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(Sat, 29 Jan 2022 21:29:02 GMT) (full text, mbox, link).
Message #64 received at 52555@debbugs.gnu.org (full text, mbox, reply):
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pukkamustard schreef op di 25-01-2022 om 19:22 [+0000]: > + (let ((eris-urn _ > + (eris-encode port > + #:block-size > + %eris-block-size-large > + #:block-reducer > + guix-eris-block-reducer))) > + (uri->string eris-urn)))))))) IIUC (and quite probably I don't, because I've only being reading things cursorly), eris-encode returns #false when the IPFS daemon is down (because then guix-eris-block-reducer returns #false). In that case, (uri->string eris-urn) = (uri->string #false) would throw an exception: scheme@(guile-user)> ((@ (web uri) uri->string) #false) ice-9/boot-9.scm:1669:16: In procedure raise-exception: In procedure struct-vtable: Wrong type argument in position 1 (expecting struct): #f Entering a new prompt. Type `,bt' for a backtrace or `,q' to continue. scheme@(guile-user) [1]> ,bt In web/uri.scm: 336:17 1 (uri->string #f #:include-fragment? _) In ice-9/boot-9.scm: 1669:16 0 (raise-exception _ #:continuable? _) Greetings, Maxime.
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(Sat, 29 Jan 2022 21:30:02 GMT) (full text, mbox, link).
Message #67 received at 52555@debbugs.gnu.org (full text, mbox, reply):
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pukkamustard schreef op di 25-01-2022 om 19:22 [+0000]: > +(define (guix-eris-block-ref ref) > + "Dereference a block for decoding ERIS content" > + (eris-blocks-ipfs-ref ref)) 'guix-eris-block-ref' just calls 'eris-blocks-ipfs-ref', so I'm not seeing the point of this procedure. Greetings, Maxime.
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(Sat, 29 Jan 2022 21:35:01 GMT) (full text, mbox, link).
Message #70 received at 52555@debbugs.gnu.org (full text, mbox, reply):
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pukkamustard schreef op di 25-01-2022 om 19:22 [+0000]: > + Superfluous new empty line? > (else > - (leave (G_ "unsupported substitute URI scheme: ~a~%") > - (uri->string uri))))) > + (if (and (eris-read-capability? uri)) guile-eris (which has the eris-read-capability? procedure) is an optional dependency, so you have to check here is Guix was compiled with guile-eris. Greetings, Maxime.
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(Sat, 29 Jan 2022 21:39:02 GMT) (full text, mbox, link).
Message #73 received at 52555@debbugs.gnu.org (full text, mbox, reply):
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pukkamustard schreef op di 25-01-2022 om 19:22 [+0000]: > + (define* (best-uri narinfo #:key (eris? #f)) > + (if (and eris? (narinfo-eris-urn narinfo)) > + (values (narinfo-eris-urn narinfo) "zstd" #f) > + (narinfo-best-uri narinfo #:fast-decompression? > + %prefer-fast-decompression?))) When Guix is compiled without guile-eris support, '(and eris? (narinfo-eris-urn narinfo))' is the worst, not the best.
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(Sat, 29 Jan 2022 21:41:02 GMT) (full text, mbox, link).
Message #76 received at 52555@debbugs.gnu.org (full text, mbox, reply):
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pukkamustard schreef op di 25-01-2022 om 19:22 [+0000]: > + (define* (best-uri narinfo #:key (eris? #f)) > + (if (and eris? (narinfo-eris-urn narinfo)) > + (values (narinfo-eris-urn narinfo) "zstd" #f) > + (narinfo-best-uri narinfo #:fast-decompression? > + %prefer-fast-decompression?))) Why is ERIS the best here? Fast download speeds, decentralisation, less network I/O, less heat production, more pronouncable than HTTPS? I would add a comment here. Greetings, Maxime.
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(Sat, 29 Jan 2022 21:41:02 GMT) (full text, mbox, link).
Message #79 received at 52555@debbugs.gnu.org (full text, mbox, reply):
Maxime Devos schreef op za 29-01-2022 om 22:38 [+0100]: > pukkamustard schreef op di 25-01-2022 om 19:22 [+0000]: > > + (define* (best-uri narinfo #:key (eris? #f)) > > + (if (and eris? (narinfo-eris-urn narinfo)) > > + (values (narinfo-eris-urn narinfo) "zstd" #f) > > + (narinfo-best-uri narinfo #:fast-decompression? > > + %prefer-fast-decompression?))) > > When Guix is compiled without guile-eris support, > '(and eris? (narinfo-eris-urn narinfo))' is the worst, not the best. Nevermind, that's what (eris? #f) is for, I presume? Greetings, Maxime.
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(Sat, 29 Jan 2022 22:19:01 GMT) (full text, mbox, link).
Message #82 received at 52555@debbugs.gnu.org (full text, mbox, reply):
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Hi, Is it possible for the following situation to happen? If so, why not? 1. server A is authentic 2. server M is malicious, it tries to trick the client into installing an incorrect substitute 3. (key of) server A is authorised 4. (key of) server M is _not_ authorised 5. server A and M are both in substitute-urls 6. server A only serves ‘classical’ substitutes, server B also serves via ERIS+ipfs 7. Both A and M set the same FileHash, References, etc. in the narinfo 8. However, M set an ERIS URN pointing to a backdoored substitute. 9. The client trusts A, and A and B have the same FileHash etc., so the client considers the narinfo of B to be authentic because it has the same FileHash. 10. The client prefers ERIS above HTTP(S), so it downloads via M. 11. The client now installed a backdoored substitute! Greetings, Maxime.
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(Sun, 30 Jan 2022 11:47:02 GMT) (full text, mbox, link).
Message #85 received at 52555@debbugs.gnu.org (full text, mbox, reply):
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pukkamustard schreef op di 25-01-2022 om 19:21 [+0000]: > I have only tested this for fairly small packages (up to a few MB). > > One issue with IPFS might be that we have to create a new HTTP connection to > the IPFS daemon for every single block (32KiB). The IPFS daemon does not seem > to support HTTP connection re-use According to <https://github.com/ipfs/go-ipfs/issues/3767>, the IPFS daemon supports connection reuse according to some people and doesn't according to other people. > and neither does the Guile (web client). Guix supports connection reuse, see 'call-with-cached-connection' in (guix scripts substitute). > I fear this might become a performance issue. IIUC, the performance problem primarily lies in the round-tripping between the client and the server. If the client and the server are on the same machine, then this round trip time is presumably small compared to, say, localhost contacting ci.guix.gnu.org. Still, connection reuse would be nice. > It seems possible to use IPFS more directly by exposing the Go code as a > C library and then using that with the Guile FFI [1]. This is however a bit > complicated and adds a lot of dependencies. In particular, this should not become > a dependency of Guix itself. The performance of IPFS itself also needs to be > evaluated, maybe the IPFS HTTP API will not be the bottle-neck. Security-wise, libipfs doesn't seem great: libipfs starts the IPFS daemon inside the process and guix/scripts/substitute.scm is run as root. > As mentioned in previous mail a simple HTTP transport for blocks would be a > good fallback. This would allow users to get missing blocks (things that > somehow got dropped from IPFS) directly from a substitute server. [...] Seems a good idea to me -- DHTs can be unreliable. I presume this will be implemented with some kind of timeout: if no block is received within N seconds, fallback to HTTP? Also, don't forget to insert this missing block back into IPFS/GNUnet/BitTorrent/..., otherwise less and less blocks will be available until nothing is available anymore. > In any case, it would be necessary for the substitute server to store encoded > blocks of the NAR. For this I think it makes sense to use a small database. We > have bindings to use ERIS with GDBM [2]. It might also make sense to use > SQLite, especially if there are other use-cases for such a database. Wouldn't this be a huge database? IIRC, according to logs.guix.gnu.org the size of the nars of the substitute servers are somewhere in the 200G-2T range or something like that. To reduce the size of the database, perhaps you could let the database be a mapping from block ids to the name of the nar + the position in the nar, and encode the block on-demand? The database doesn't seem necessary, the substitute server could have some end-point /publish-this-nar-again-into-IPFS/name-of-the-nar which, when contacted, inserts the nar again into IPFS. Then when a block was unavailable, the client contacts this end-point and retries. Greetings, Maxime.
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(Wed, 02 Feb 2022 09:55:01 GMT) (full text, mbox, link).
Message #88 received at 52555@debbugs.gnu.org (full text, mbox, reply):
Hi Maxime, Maxime Devos <maximedevos@telenet.be> writes: > There's an ipfs-service-type nowadays, so starting the daemon manually > isn't required (if using Guix System). Good point. Starting the daemon manually is only necessary if you don't use the service. I don't use the IPFS service. -pukkamustard
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(Wed, 02 Feb 2022 10:10:01 GMT) (full text, mbox, link).
Message #91 received at 52555@debbugs.gnu.org (full text, mbox, reply):
Maxime Devos <maximedevos@telenet.be> writes: > [[PGP Signed Part:Undecided]] > pukkamustard schreef op di 25-01-2022 om 19:21 [+0000]: >> I will be looking into the HTTP fallback and also using BitTorrent and GNUNet >> as transports. > > I have been writing a (Guile) Scheme port of GNUnet's client libraries > (https://git.gnunet.org/gnunet-scheme.git/). Currently only NSE is > supported, but I'm working on DHT. DHT search/put already works to a > degree (see examples/web.scm), but there are plenty of sharp edges > (see TODOs about disconnecting, reconnecting and stopping fibers, > and see guix.scm for Guile bugs that are patched out and extra guile- > fibers features). Very interesting! I have been following your work on that a bit. From what I understand gnunet-scheme interacts with the GNUNet services and sends messages to the various GNUNet services. Is that correct? Have you considered implementing the GNUNet protocols themeselves in Guile? I.e. instead of connecting with the GNUNet services and sending messages, implement R5N completely in Guile. IMHO this would be very nice as one could use GNUNet protocols completely in Guile and not rely on the GNUNet C code. I believe this is somewhat the direction being taken with the GNUNet Go implementation (https://github.com/bfix/gnunet-go) and also in line with recent efforts to specify the individual GNUNet components and protocols more independantly of one another (e.g. R5N is specified to work over IP - https://lsd.gnunet.org/lsd0004/). -pukkamustard
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(Wed, 02 Feb 2022 10:16:01 GMT) (full text, mbox, link).
Message #94 received at 52555@debbugs.gnu.org (full text, mbox, reply):
Maxime Devos <maximedevos@telenet.be> writes: > [[PGP Signed Part:Undecided]] > pukkamustard schreef op di 25-01-2022 om 19:22 [+0000]: >> +(define (guix-eris-block-ref ref) >> + "Dereference a block for decoding ERIS content" >> + (eris-blocks-ipfs-ref ref)) > > 'guix-eris-block-ref' just calls 'eris-blocks-ipfs-ref', > so I'm not seeing the point of this procedure. Yes, currently it is an unnecessary level of abstraction. The idea is that when there are multiple backends/transports they are multiplexed here. E.g. guix-eris-block-ref would attempt to use HTTP/IPFS or whatever to get the block. Whatever calls guix-eris-block-ref does not need to know from where the blocks come. I hope to make this more clear in a V3 that will add HTTP transport. -pukkamustard
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(Wed, 02 Feb 2022 10:25:02 GMT) (full text, mbox, link).
Message #97 received at 52555@debbugs.gnu.org (full text, mbox, reply):
Maxime Devos <maximedevos@telenet.be> writes: > pukkamustard schreef op di 25-01-2022 om 19:21 [+0000]: >> + (define (eris-encode-nar compressions) >> + (and (member %eris-zstd-compression compressions) >> + (let* ((nar (nar-cache-file cache item >> + #:compression %eris-zstd-compression)) >> + (stat (stat nar #f))) >> + (and stat >> + (call-with-input-file nar >> + (cut eris-encode->string <> >> + #:block-size %eris-block-size-large)))))) > > Why are exceptions turned into #f (in (stat nar #f))? > Should this be done for all I/O errors, including, say, EOVERFLOW, > ENOMEM or ENAMETOOLONG, or only for ENOENT? > > Is a race condition possible here? If so, maybe consider doing > something like > > (catch 'system-error > (lambda () (call-with-input-file ...)) > (lambda exception > (and it-is-a-ENOENT > (apply throw exception)))) > > to avoid it? A valid question. But (stat nar #f) is not something I introduced. It is already in guix/scripts/publish.scm like that. To me turning all exceptions to #f makes sense. Here we only want to know if the file is readable. As the NAR is baked in the background by another thread the case where the compressed NAR does exist yet will happen. In that case we don't worry, we just don't publish the `FileSize` and `ERIS` fields in the narinfo. -pukkamustard
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(Wed, 02 Feb 2022 10:37:01 GMT) (full text, mbox, link).
Message #100 received at 52555@debbugs.gnu.org (full text, mbox, reply):
Maxime Devos <maximedevos@telenet.be> writes: > pukkamustard schreef op di 25-01-2022 om 19:21 [+0000]: >> +(define (ipfs-daemon-alive?) >> + "Attempt to connect to the IPFS daemon. Returns #t if the daemon is alive >> +and #f else." >> + (with-exception-handler >> + (const #f) >> + (lambda _ >> + (let ((response _ >> + (http-post (string-append (%ipfs-base-url) >> + "/api/v0/version")))) >> + (equal? 200 (response-code response)))) >> + #:unwind? #t)) > > This should preferably only be catching exceptions indicating that > the daemon is down (exceptions indicating 404s, or system-errors > indicating network errors, ...). Yes, I guess it could be checked a bit finer. But at the end if an exception happens then the IPFS daemon is probably not reachable, right? If we don't care about the reason why it is not reachable then why bother with catching finer grained exceptions? >> + >> +(define guix-eris-block-reducer >> + (case-lambda >> + >> + ;; Check if IPFS Daemon is running. >> + (() (if (ipfs-daemon-alive?) >> + (eris-blocks-ipfs-reducer) >> + #f)) >> + >> + ;; Completion. Nothing to do. >> + ((_) #t) >> + >> + ((ipfs ref-block) >> + ;; If IPFS has been initialized store block there >> + (if ipfs >> + (eris-blocks-ipfs-reducer ipfs ref-block) >> + ipfs)))) > > This (ipfs-daemon-alive?) seems racy, although it's probably not. > Can we do > > (define guix-eris-block-reducer > (case-lambda > (() (guard (c (oops-it-fails-because-the-daemon-cannot-be- > contacted? c) > #false) > (eris-block-ipfs-reducer)) > [...])) > > instead? (I don't think this will work as-is, because from the name and > thunkiness, it would appear that eris-block-ipfs-reducer returns a > procedure ... Yes, eris-block-ipfs-reducer returns and SRFI-171 reducer. This is a 3-arity procedure that is either initialized, called with a block to reduce and finalized. The #f that the initialization case returns (0-arity call) is the state of the reducer. In the block reducing case (2-ary call) the state (the ipfs variable) is checked if ipfs is alive. If not the blocks are just forgotten. So guix-eris-block-reducer always returns a SRF-171 reducer, regardless of if IPFS is alive or not. This is important as the ERIS URN can still be computed without the IPFS daemon running. -pukkamustard
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(Wed, 02 Feb 2022 10:38:02 GMT) (full text, mbox, link).
Message #103 received at 52555@debbugs.gnu.org (full text, mbox, reply):
Maxime Devos <maximedevos@telenet.be> writes: > [[PGP Signed Part:Undecided]] > pukkamustard schreef op di 25-01-2022 om 19:22 [+0000]: >> + (let ((eris-urn _ >> + (eris-encode port >> + #:block-size >> + %eris-block-size-large >> + #:block-reducer >> + guix-eris-block-reducer))) >> + (uri->string eris-urn)))))))) > > IIUC (and quite probably I don't, because I've only being reading > things cursorly), eris-encode returns #false when the IPFS daemon is > down (because then guix-eris-block-reducer returns #false). No, eris-encode will still return the ERIS URN. The blocks will just not be stored in IPFS if the IPFS daemon is not running. See also my response to the questions on guix-eris-block-reducer in (guix eris). -pukkamustard
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(Wed, 02 Feb 2022 10:51:02 GMT) (full text, mbox, link).
Message #106 received at 52555@debbugs.gnu.org (full text, mbox, reply):
Maxime Devos <maximedevos@telenet.be> writes: > [[PGP Signed Part:Undecided]] > pukkamustard schreef op di 25-01-2022 om 19:22 [+0000]: >> + (define* (best-uri narinfo #:key (eris? #f)) >> + (if (and eris? (narinfo-eris-urn narinfo)) >> + (values (narinfo-eris-urn narinfo) "zstd" #f) >> + (narinfo-best-uri narinfo #:fast-decompression? >> + %prefer-fast-decompression?))) > > Why is ERIS the best here? Fast download speeds, decentralisation, > less network I/O, less heat production, more pronouncable than HTTPS? > I would add a comment here. Those are all possible reasons. I think we first need to do some experiments to see if any of those claims can be justified. In general, the logic for when to use ERIS transports needs more thought. For one, I think it should be user configurable. I can imagine that certain users do not want to use decentralized substitutes at all. Users should be able to deactivate the entire ERIS thing. For the default, I personally think it would be ok to try and use ERIS. The only thing we absolutely need is a clean fallback logic that transparently falls back to getting the entire NAR by HTTP. Currently such a fallback is not yet implemented. -pukkamustard
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(Wed, 02 Feb 2022 11:10:02 GMT) (full text, mbox, link).
Message #109 received at 52555@debbugs.gnu.org (full text, mbox, reply):
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pukkamustard schreef op wo 02-02-2022 om 09:56 [+0000]: > Maxime Devos <maximedevos@telenet.be> writes: > > > [[PGP Signed Part:Undecided]] > > pukkamustard schreef op di 25-01-2022 om 19:21 [+0000]: > > > I will be looking into the HTTP fallback and also using BitTorrent and GNUNet > > > as transports. > > > > I have been writing a (Guile) Scheme port of GNUnet's client libraries > > (https://git.gnunet.org/gnunet-scheme.git/). Currently only NSE is > > supported, but I'm working on DHT. DHT search/put already works to a > > degree (see examples/web.scm), but there are plenty of sharp edges > > (see TODOs about disconnecting, reconnecting and stopping fibers, > > and see guix.scm for Guile bugs that are patched out and extra guile- > > fibers features). > > Very interesting! I have been following your work on that a bit. > > From what I understand gnunet-scheme interacts with the GNUNet services > and sends messages to the various GNUNet services. Is that correct? Yes, it works like the C GNUnet client libraries, except it's in Guile Scheme and a few different design decisions were made, e.g. w.r.t. concurrency. > Have you considered implementing the GNUNet protocols themeselves in > Guile? I.e. instead of connecting with the GNUNet services and sending > messages, implement R5N completely in Guile. I didn't, at least not _yet_. As-is, things are already complicated enough and the client code seems a lot simpler than the service code. Though perhaps in the future ... E.g., for testing the DHT service, the test code effectively creates a tiny, limited, in-memory DHT service (not communicating to any peers) that's buggy in some respects (not yet committed, but will be in tests/distributed-hash-table.scm). > IMHO this would be very nice as one could use GNUNet protocols completely > in Guile and not rely on the GNUNet C code. While it's not a priority, I'm not opposed to someday implementing the services in Guile and testing whether they can communicate with C peers. However, keep in mind that GNUnet is supposed to be able to eventually replace the TCP/IP stack, and running the DHT, NSE, NAT, FS, CADET, TRANSPORT ... services in every web browser, in every mail client, in all "guix substitute" and "guix perform-download" processes, etc. is rather wasteful (memory-wise and CPU-wise), so I'd prefer this not to be the _default_ option. (I'm not sure if you were referring to that.) Greetings, Maxme.
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(Wed, 02 Feb 2022 11:11:02 GMT) (full text, mbox, link).
Message #112 received at 52555@debbugs.gnu.org (full text, mbox, reply):
Maxime Devos <maximedevos@telenet.be> writes: > [[PGP Signed Part:Undecided]] > pukkamustard schreef op di 25-01-2022 om 19:21 [+0000]: >> I have only tested this for fairly small packages (up to a few MB). >> >> One issue with IPFS might be that we have to create a new HTTP connection to >> the IPFS daemon for every single block (32KiB). The IPFS daemon does not seem >> to support HTTP connection re-use > > According to <https://github.com/ipfs/go-ipfs/issues/3767>, the IPFS > daemon supports connection reuse according to some people and doesn't > according to other people. Hm, from what I understand connection re-use is something introduced in HTTP/2 and go-ipfs does not do HTTP/2 (https://github.com/ipfs/go-ipfs/issues/5974). >> and neither does the Guile (web client). > > Guix supports connection reuse, see 'call-with-cached-connection' > in (guix scripts substitute). Ah ok. Cool! >> I fear this might become a performance issue. > > IIUC, the performance problem primarily lies in the round-tripping > between the client and the server. If the client and the server are on > the same machine, then this round trip time is presumably small > compared to, say, localhost contacting ci.guix.gnu.org. > > Still, connection reuse would be nice. Remains to be seen if this is a problem. It is considerably more pronounced than with regular usage of IPFS as we make a HTTP request to IPFS for every 32KiB block instead of for an entire file (what most people do when using the IPFS daemon). >> It seems possible to use IPFS more directly by exposing the Go code as a >> C library and then using that with the Guile FFI [1]. This is however a bit >> complicated and adds a lot of dependencies. In particular, this should not become >> a dependency of Guix itself. The performance of IPFS itself also needs to be >> evaluated, maybe the IPFS HTTP API will not be the bottle-neck. > > Security-wise, libipfs doesn't seem great: libipfs starts the IPFS > daemon inside the process and guix/scripts/substitute.scm is run > as root. I agree. >> As mentioned in previous mail a simple HTTP transport for blocks would be a >> good fallback. This would allow users to get missing blocks (things that >> somehow got dropped from IPFS) directly from a substitute server. [...] > > Seems a good idea to me -- DHTs can be unreliable. I presume this will > be implemented with some kind of timeout: if no block is received > within N seconds, fallback to HTTP? Yes, exactly. > Also, don't forget to insert this missing block back into > IPFS/GNUnet/BitTorrent/..., otherwise less and less blocks will be > available until nothing is available anymore. This might be a bit of a burden for users. As you mention the size of such a database might become considerable. >> In any case, it would be necessary for the substitute server to store encoded >> blocks of the NAR. For this I think it makes sense to use a small database. We >> have bindings to use ERIS with GDBM [2]. It might also make sense to use >> SQLite, especially if there are other use-cases for such a database. > > Wouldn't this be a huge database? IIRC, according to logs.guix.gnu.org > the size of the nars of the substitute servers are somewhere in the > 200G-2T range or something like that. > > To reduce the size of the database, perhaps you could let the database > be a mapping from block ids to the name of the nar + the position in > the nar, and encode the block on-demand? Yes! I've also been thinking of this - a "in-file" block store. I think this makes a lot of sense for Guix but also other things (e.g. sharing your music collection). Another problem with IPFS/GNUNet is that they have their own storage. So even if are clever about storing blocks in Guix, IPFS and GNUNet will have their own copy of the blocks on disk. I think it would be much nicer if DHTs/transport layers don't do block storage but are provided with a callback from where they can get stored blocks. I believe this is what OpenDHT does (https://github.com/savoirfairelinux/opendht/wiki/API-Overview). I think we should propose such a change to the GNUNet R5N specification (https://lsd.gnunet.org/lsd0004/). > The database doesn't seem necessary, the substitute server could have > some end-point > > /publish-this-nar-again-into-IPFS/name-of-the-nar > > which, when contacted, inserts the nar again into IPFS. Then when a > block was unavailable, the client contacts this end-point and retries. But for a HTTP block endpoint we would still need such a database/block storage. I think it is important that we do not rely on IPFS for block storage. The decentralized block distribution should work even if the IPFS daemon is not available. -pukkamustard
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(Wed, 02 Feb 2022 11:22:01 GMT) (full text, mbox, link).
Message #115 received at 52555@debbugs.gnu.org (full text, mbox, reply):
Maxime Devos <maximedevos@telenet.be> writes: > [[PGP Signed Part:Undecided]] > Hi, > > Is it possible for the following situation to happen? > If so, why not? > > 1. server A is authentic > 2. server M is malicious, it tries to trick the client into > installing an incorrect substitute > 3. (key of) server A is authorised > 4. (key of) server M is _not_ authorised > 5. server A and M are both in substitute-urls > 6. server A only serves ‘classical’ substitutes, server B also serves > via ERIS+ipfs > 7. Both A and M set the same FileHash, References, etc. in the > narinfo > 8. However, M set an ERIS URN pointing to a backdoored substitute. > 9. The client trusts A, and A and B have the same FileHash etc., > so the client considers the narinfo of B to be authentic > because it has the same FileHash. > 10. The client prefers ERIS above HTTP(S), so it downloads via M. > 11. The client now installed a backdoored substitute! > > Greetings, > Maxime. No this should not work. The ERIS URN is only used if the entire narinfo is signed with a authorized signature. The FileHash is not used when getting substitutes via ERIS (being able to decode ERIS content implies integrity). The interesting case that would be allowed with ERIS is following: 1. Server A is authentic and its key is authorized. 2. Servers M1 to MN are potentially malicious and their keys are not authorized. 3. Server A and servers M1 to MN are in the substitute-urls. 4. Client gets Narinfo from server A and uses the ERIS URN from there. 5. Client can get blocks simultaneously from Server A and servers M1 to MN. 6. Client decodes content with the ERIS URN and can be sure that they have the valid substitute. So client only needs to trust A but can use M1-MN (simultaneously) for fetching the content. -pukkamustard
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(Wed, 02 Feb 2022 11:28:01 GMT) (full text, mbox, link).
Message #118 received at 52555@debbugs.gnu.org (full text, mbox, reply):
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pukkamustard schreef op wo 02-02-2022 om 10:51 [+0000]: > > The database doesn't seem necessary, the substitute server could > > have > > some end-point > > > > /publish-this-nar-again-into-IPFS/name-of-the-nar > > > > which, when contacted, inserts the nar again into IPFS. Then when > > a > > block was unavailable, the client contacts this end-point and > > retries. > > But for a HTTP block endpoint we would still need such a > database/block > storage. > > I think it is important that we do not rely on IPFS for block > storage. The decentralized block distribution should work even if the > IPFS daemon is not available. Do we need a database at all? E.g., if the client cannot download the data in the range [start, end] because the corresponding block has disappeared, can it not simply download that range from https://ci.guix.gnu.org/nar/[...] (not sure about the URI) using a HTTP range request? (Afterwards, the client should insert the block(s) back into IPFS/GNUnet/whatever, maybe using this proposed ‘in-file block store’ such that other clients (using the same DHT mechanism) can benefit.) Greetings, Maxime.
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(Wed, 02 Feb 2022 12:53:01 GMT) (full text, mbox, link).
Message #121 received at 52555@debbugs.gnu.org (full text, mbox, reply):
Maxime Devos <maximedevos@telenet.be> writes: >> I think it is important that we do not rely on IPFS for block >> storage. The decentralized block distribution should work even if the >> IPFS daemon is not available. > > Do we need a database at all? > > E.g., if the client cannot download the data in the range [start, end] > because the corresponding block has disappeared, can it not simply > download that range from https://ci.guix.gnu.org/nar/[...] > (not sure about the URI) using a HTTP range request? This does not work as the mapping from block reference to location in NAR can not be known by the client who only holds the ERIS URN. Furthermore, some blocks will be intermediary nodes - they hold references to content blocks (or other intermediary nodes) but not content itself. > (Afterwards, the client should insert the block(s) back into > IPFS/GNUnet/whatever, maybe using this proposed ‘in-file block store’ > such that other clients (using the same DHT mechanism) can benefit.) It might make sense for some clients to make content available to other clients and to go trough the extra effort of putting blocks back into IPFS/GNUNet/whatever. But this should be optional. Maybe we can call such clients "caching peers"? IMO A client should by default only deal with things that are strictly necessary for getting substitutes. The substistute servers (and caching peers) should make sure substitutes are available to clients, whether over IPFS/GNUNet/whatever or plain old HTTP. -pukkamustard
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(Wed, 02 Feb 2022 15:08:02 GMT) (full text, mbox, link).
Message #124 received at 52555@debbugs.gnu.org (full text, mbox, reply):
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pukkamustard schreef op wo 02-02-2022 om 12:42 [+0000]: > > (Afterwards, the client should insert the block(s) back into > > IPFS/GNUnet/whatever, maybe using this proposed ‘in-file block > > store’ > > such that other clients (using the same DHT mechanism) can > > benefit.) > > It might make sense for some clients to make content available to > other > clients and to go trough the extra effort of putting blocks back into > IPFS/GNUNet/whatever. But this should be optional. Maybe we can call > such clients "caching peers"? > > IMO A client should by default only deal with things that are > strictly > necessary for getting substitutes. The substistute servers (and > caching > peers) should make sure substitutes are available to clients, whether > over IPFS/GNUNet/whatever or plain old HTTP. If re-inserting missing blocks back into the IPFS/GNUnet/whatever is made optional and is off by default, then almost nobody will enable the ‘caching peer’ option and we will have freeloaders, somewhat defeating the point of GNUnet/whatever. In a classic setting (‘plain old HTTP’), serving and downloading is a separate thing. But in a P2P setting, downloading cannot be separated from uploading -- strictly speaking, a peer might be able to download without uploading (depending on the P2P system), but that's anti- social, not something that should be done by default. However, if re-inserting missing blocks is _on_ by default, then there doesn't seem to be any trouble. Greetings, Maxime.
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(Wed, 02 Feb 2022 15:29:02 GMT) (full text, mbox, link).
Message #127 received at 52555@debbugs.gnu.org (full text, mbox, reply):
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pukkamustard schreef op wo 02-02-2022 om 12:42 [+0000]: > > E.g., if the client cannot download the data in the range [start, > > end] > > because the corresponding block has disappeared, can it not simply > > download that range from https://ci.guix.gnu.org/nar/[...] > > (not sure about the URI) using a HTTP range request? > > This does not work as the mapping from block reference to location in > NAR can not be known by the client who only holds the ERIS > URN. The client not only knows the ERIS URN, it also knows the location of the nar (over classical HTTP) because it's in the narinfo. > Furthermore, some blocks will be intermediary nodes - they hold > references to content blocks (or other intermediary nodes) but not > content itself. If an intermediary node (responsible for, say, bytes 900--10000) is missing, then the bytes 900--10000 could be downloaded via HTTP. Whether the node is close to the top, or close to the bottom, in ERIS' variant of Merkle trees, doesn't matter much. Granted, if the nar is, say, 1 GiB, and the top-level block is missing, then we'll have to download 1 GiB over HTTP, even if most lower blocks exist on IPFS/GNUnet/whatever, which isn't really great. We could also do some combination of the GDBM database and HTTP Content-Range requests: most nodes are leaf nodes (*). Instead of representing all nodes in the database, we could include only (intermediate) nodes responsible for data of size, say, 4MiB. (*) At least, that's the case for binary trees, presumably something similar holds for ERIS. I don't know the specifics for ERIS, but for (balanced) binary trees, not storing the leaf nodes would save about 50% (**), which is a rather nice space saving. (**) This assumes the ‘block size’ is the size for storing two pointers to the children, but in practice the block size would be quite a bit larger, so there would be more space savings? Perhaps we are overthinking things and the GDBM (***) database isn't overly large, or perhaps missing blocks are sufficiently rare such that we could simply download the _entire_ nar from classical HTTP in case of missing blocks ... (***) Guix uses SQlite databases, so I would use SQLite instead of GDBM unless there's a compelling reason to use GDBM instead. Greetings, Maxime.
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(Wed, 02 Feb 2022 15:37:01 GMT) (full text, mbox, link).
Message #130 received at 52555@debbugs.gnu.org (full text, mbox, reply):
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pukkamustard schreef op wo 02-02-2022 om 10:28 [+0000]: > > pukkamustard schreef op di 25-01-2022 om 19:21 [+0000]: > > > +(define (ipfs-daemon-alive?) > > > + "Attempt to connect to the IPFS daemon. Returns #t if the > > > daemon is alive > > > +and #f else." > > > + (with-exception-handler > > > + (const #f) > > > + (lambda _ > > > + (let ((response _ > > > + (http-post (string-append (%ipfs-base-url) > > > + > > > "/api/v0/version")))) > > > + (equal? 200 (response-code response)))) > > > + #:unwind? #t)) > > > > This should preferably only be catching exceptions indicating that > > the daemon is down (exceptions indicating 404s, or system-errors > > indicating network errors, ...). > > Yes, I guess it could be checked a bit finer. But at the end if an > exception happens then the IPFS daemon is probably not reachable, > right? > If we don't care about the reason why it is not reachable then why > bother with catching finer grained exceptions? The exception could be caused by, say: * an unbound variable * wrong arity * type error * stack overflow * prompt tag does not exist in current environment * out of memory Except for the last one, these causes are all bugs and hence shouldn't be surpressed. Granted, this is a bit unlikely since this use of 'http-post' is very simple, but it's far from impossible for (web client) to have a bug. Greetings, Maxime.
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(Thu, 03 Feb 2022 20:37:02 GMT) (full text, mbox, link).
Message #133 received at 52555@debbugs.gnu.org (full text, mbox, reply):
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pukkamustard schreef op wo 02-02-2022 om 11:10 [+0000]: > The ERIS URN is only used if the entire narinfo is signed with a > authorized signature. Perhaps I'm missing something here, but in that case, shouldn't "ERIS" be added to %mandatory-fields in (guix narinfo)? Anyway, I don't see what prevents an unauthorised narinfo with a ERIS URN to be used: the narinfo is chosen with (define narinfo (lookup-narinfo cache-urls store-item (if (%allow-unauthenticated-substitutes?) (const #t) (cut valid-narinfo? <> acl)))) where lookup-narinfo is a tiny wrapper around lookup-narinfos/diverse. lookup-narinfos/diverse considers both unauthorised and authorised narinfos, and can choose an unauthorised narinfo if it's ‘equivalent’ to an authorised narinfo (using equivalent-narinfo?) equivalent-narinfo? only looks at the hash, path, references and size, and ignores the ERIS. As such, an unauthorised narinfo with a malicious ERIS URN could be selected. However, it turns out that all this doesn't really matter: whether the port returned by 'fetch' in (guix scripts substitute) came from file://, http://, https:// or ERIS, the file hash is verified later anyway: ;; Compute the actual nar hash as we read it. ((algorithm expected) (narinfo-hash-algorithm+value narinfo)) ((hashed get-hash) (open-hash-input-port algorithm input))) [...] ;; Check whether we got the data announced in NARINFO. (let ((actual (get-hash))) (if (bytevector=? actual expected) [...] False alarm I guess! Greetings, Maxime.
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(Fri, 04 Feb 2022 10:47:02 GMT) (full text, mbox, link).
Message #136 received at 52555@debbugs.gnu.org (full text, mbox, reply):
Maxime Devos <maximedevos@telenet.be> writes: > pukkamustard schreef op wo 02-02-2022 om 11:10 [+0000]: >> The ERIS URN is only used if the entire narinfo is signed with a >> authorized signature. > > Perhaps I'm missing something here, but in that case, shouldn't "ERIS" > be added to %mandatory-fields in (guix narinfo)? > > Anyway, I don't see what prevents an unauthorised narinfo with a ERIS > URN to be used: the narinfo is chosen with > > (define narinfo > (lookup-narinfo cache-urls store-item > (if (%allow-unauthenticated-substitutes?) > (const #t) > (cut valid-narinfo? <> acl)))) > > where lookup-narinfo is a tiny wrapper around lookup-narinfos/diverse. > lookup-narinfos/diverse considers both unauthorised and authorised > narinfos, and can choose an unauthorised narinfo if it's ‘equivalent’ > to an authorised narinfo (using equivalent-narinfo?) > > equivalent-narinfo? only looks at the hash, path, references and size, > and ignores the ERIS. As such, an unauthorised narinfo with a > malicious ERIS URN could be selected. You're right. I was not aware that parts of unauthorized narinfos are used when they are deemed equavelent to authorized narinfos with equivalent-narinfo?. > > However, it turns out that all this doesn't really matter: whether the > port returned by 'fetch' in (guix scripts substitute) came from > file://, http://, https:// or ERIS, the file hash is verified later > anyway: > > ;; Compute the actual nar hash as we read it. > ((algorithm expected) > (narinfo-hash-algorithm+value narinfo)) > ((hashed get-hash) > (open-hash-input-port algorithm input))) > > [...] > > ;; Check whether we got the data announced in NARINFO. > (let ((actual (get-hash))) > (if (bytevector=? actual expected) > [...] > > False alarm I guess! Yeah, good that the hash is checked. Still, I think we should not even try downloading a ERIS URN that is not authorized. I think adding a check to equivalent-narinfo? that makes sure that the ERIS URNs are equivalent if present would fix this. wdyt? -pukkamustard
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(Fri, 04 Feb 2022 16:17:02 GMT) (full text, mbox, link).
Message #139 received at 52555@debbugs.gnu.org (full text, mbox, reply):
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pukkamustard schreef op wo 02-02-2022 om 10:51 [+0000]: > > Also, don't forget to insert this missing block back into > > IPFS/GNUnet/BitTorrent/..., otherwise less and less blocks will be > > available until nothing is available anymore. > > This might be a bit of a burden for users. As you mention the size of > such a database might become considerable. At least in GNUnet, there are quota on the size of the datastore (and presumably, whatever the DHT service uses as database). When it's exceeded, old blocks are removed. So I don't see a burden here, assuming that the quota aren't overly large by default. Greetings, Maxime.
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(Thu, 29 Dec 2022 18:14:01 GMT) (full text, mbox, link).
Message #142 received at 52555@debbugs.gnu.org (full text, mbox, reply):
Hello Guix, I'm very happy to present a V3 of a proposal towards decentralizing substitute distribution with ERIS. An initial version [1] and a V2 [2] are now almost a years old! The idea is to use ERIS (Encoding for Robust Immutable Storage) [3] to allow more decentralized substitute distribution. ERIS defines an encoding of content into uniformly sized, encrypted and content-addressed blocks (32KiB). The content can be decoded from the blocks given a short identifier called the read capability. It allows a network-optimized form of content-addressing. Blocks can be transported over many different transport protocols, such as HTTP, CoAP, GNUnet, IPFS or a SD card sent via pigeons. Only the read capability must be transmited securely. Given an authentic read capability, the content can be decoded correctly from blocks that might have been transported over unreliable (and untrusted) protocols. For Guix, substitutes (Nar files) are encoded using ERIS and the read capability is added to the signed Narinfos. The read capability published in the Narinfo can then be used to decode the Nar from blocks that are fetched from many peers over many different protocols. This version of the patches allows blocks to be fetched over HTTP and IPFS. A summary of this patch series: - Use the stable version of the ERIS encoding (version 1.0.0) - Add two fields to Narinfos (ERIS and ERISFormat) - Store blocks of published substitutes in a local block store (in `/var/guix/eris`) - Add an endpoint for resolving ERIS blocks over HTTP (a la RFC 2169) - Use ERIS when fetching substitutes - Use IPFS for de-referencing ERIS blocks Testing procedure is a bit tedious, but described in the V2: https://issues.guix.gnu.org/52555#8-lineno16 Please give it a try or a read. Two commits are marked as WIP and have some todos regarding configuration. Suggestions in how to go about Guix wide configuration are very welcome. Some further ideas include: - We've been researching CoAP (RFC 7252) as a transport protocol for blocks. It is lightweight, performant, well-specified and optimized for small implementations, meaning it can be reasonably implemented in pure Guile. This would allow more light-weight peer connections (over UDP) and also discovery of local peers via CoAP service discovery [4] - very similar to how Avahi is currently used. - Publish substitutes to IPFS. Currently substitutes are not published to IPFS. It might make sense to add a CLI command that does this. In a previous verion of the series this was done when a substitute is requested over HTTP. But it seems to make sense to publish on IPFS (or other protocols) independantly of the HTTP endpoints. - Use an optimized format for encoding Nars. Based on some investigation into SquashFS, EROFS and de-duplication of files in substitutes [5], we have an initial proposal of how to encode Nars (and in general file system trees) in ERIS so that common files are de-duplicated: https://codeberg.org/eris/eer/pulls/2. - More transport protocols. Thanks for making it so far! :) I'd be very happy for your thoughs and ideas. There might also be opportunity to discuss these ideas at Guix Days in February. Best regards and a happy new year, pukkamustard [1] https://issues.guix.gnu.org/52555#0 [2] https://issues.guix.gnu.org/52555#8 [3] http://purl.org/eris [4] https://www.rfc-editor.org/rfc/rfc7252#section-7 [5] https://lists.gnu.org/archive/html/guix-devel/2020-12/msg00328.html pukkamustard (8): publish: Add ERIS URN to narinfo. publish: Store ERIS encoded blocks to a local block store. publish: Add HTTP endpoint for resolving ERIS blocks. WIP: substitute: Fetch substitutes using ERIS. eris/http: Add HTTP block de-referencer. WIP: eris: Use HTTP to get ERIS blocks. eris: Use parameterized %eris-peers when getting blocks. eris: Use IPFS to get ERIS blocks. Makefile.am | 4 + configure.ac | 5 + gnu/packages/package-management.scm | 1 + guix/eris.scm | 95 ++++++++++++ guix/eris/fs-store.scm | 66 +++++++++ guix/eris/http.scm | 82 +++++++++++ guix/eris/ipfs.scm | 214 ++++++++++++++++++++++++++++ guix/narinfo.scm | 16 ++- guix/scripts/publish.scm | 55 ++++++- guix/scripts/substitute.scm | 44 ++++-- 10 files changed, 563 insertions(+), 19 deletions(-) create mode 100644 guix/eris.scm create mode 100644 guix/eris/fs-store.scm create mode 100644 guix/eris/http.scm create mode 100644 guix/eris/ipfs.scm base-commit: c37b6fba1af0d823bd18c753484459b40fc8c041 prerequisite-patch-id: 38bf058b6e298a205d7c9bc19f6358ee3cd5257b prerequisite-patch-id: b2bb0971706132f1f02d99a9a7504fb195d6a74a prerequisite-patch-id: 60537c1eb34acc412769470c7ee90043bde600f9 prerequisite-patch-id: 71cb6edb430a0b8371b4c06d171b51e781bfe348 prerequisite-patch-id: 38a019a8380ac8dfb77bfb6304159ce8ca6d32dd prerequisite-patch-id: a53a66ddac48c405f30debc74b267de5895394c9 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prerequisite-patch-id: a271827200f68b3d97ff00e5a8d2c3c0063ce876 prerequisite-patch-id: 0f0b922bf4dcdf097e26acef44e8a19f38951868 prerequisite-patch-id: a3b1332c7c9a1178a64b1c157f6bd222c6c9e94c prerequisite-patch-id: f42659f53a09c38dbefa0dcae8805dcb116dac5a prerequisite-patch-id: 403d843faad9cd285532af17d268d32b1dcc296d prerequisite-patch-id: 4aa271a1f70f1f9c39361b1919afb9979206f9f5 prerequisite-patch-id: 65dcc366cd051cdbe99d623da18f950ef2eb1bda prerequisite-patch-id: 2e3923d53a1e9e3cf781980fffbb83ed1b5bd83f prerequisite-patch-id: 1afe3d7f859fad87b64500d0556f7bceb2a46f16 prerequisite-patch-id: 21e5eabbd9fd2bc0ceaf2e680307e5517102dd75 prerequisite-patch-id: e2e04876446779c0bc2fbf4325da5cd43835373f prerequisite-patch-id: 33784702e675a95919d8904effbcac47b0b1637d prerequisite-patch-id: 4c6e7a460e3f55461eb4de835e2ea0a19434d8ba prerequisite-patch-id: 518053e93a3b7c0526955209963d8aea588d16df prerequisite-patch-id: 807e92e7e7f1449d5514476acdd1b88a0d0e5590 -- 2.38.1
Information forwarded
to guix-patches@gnu.org
:
bug#52555
; Package guix-patches
.
(Thu, 29 Dec 2022 18:15:01 GMT) (full text, mbox, link).
Message #145 received at 52555@debbugs.gnu.org (full text, mbox, reply):
* guix/scripts/publish.scm: (bake-narinfo+nar): Compute ERIS URN of compressed nars. (narinfo-string): Add #:eris-urn parameter and honor it. * guix/scripts/narinfo.scm: (<narinfo>)[eris-format,eris-urn]: New fields. (narinfo-maker): Handle ERIS URN and ERIS format. * configure.ac: (HAVE_GUILE_ERIS): New conditional. * gnu/packages/package-management.scm: (guix)[native-inputs]: Add guile-eris. --- configure.ac | 5 +++++ gnu/packages/package-management.scm | 1 + guix/narinfo.scm | 16 +++++++++----- guix/scripts/publish.scm | 34 ++++++++++++++++++++++++----- 4 files changed, 46 insertions(+), 10 deletions(-) diff --git a/configure.ac b/configure.ac index 92dede8014..52a37a6113 100644 --- a/configure.ac +++ b/configure.ac @@ -173,6 +173,11 @@ GUILE_MODULE_AVAILABLE([have_guile_avahi], [(avahi)]) AM_CONDITIONAL([HAVE_GUILE_AVAHI], [test "x$have_guile_avahi" = "xyes"]) +dnl Check for Guile-eris. +GUILE_MODULE_AVAILABLE([have_guile_eris], [(eris)]) +AM_CONDITIONAL([HAVE_GUILE_ERIS], + [test "x$have_guile_eris" = "xyes"]) + dnl Guile-newt is used by the graphical installer. GUILE_MODULE_AVAILABLE([have_guile_newt], [(newt)]) diff --git a/gnu/packages/package-management.scm b/gnu/packages/package-management.scm index 2ffaa12247..3585f6c073 100644 --- a/gnu/packages/package-management.scm +++ b/gnu/packages/package-management.scm @@ -419,6 +419,7 @@ (define code ("guile-zstd" ,guile-zstd) ("guile-ssh" ,guile-ssh) ("guile-git" ,guile-git) + ("guile-eris" ,guile-eris) ;; XXX: Keep the development inputs here even though ;; they're unnecessary, just so that 'guix environment diff --git a/guix/narinfo.scm b/guix/narinfo.scm index 741c7ad406..d7f8c88f8f 100644 --- a/guix/narinfo.scm +++ b/guix/narinfo.scm @@ -45,6 +45,8 @@ (define-module (guix narinfo) narinfo-file-sizes narinfo-hash narinfo-size + narinfo-eris-format + narinfo-eris-urn narinfo-references narinfo-deriver narinfo-system @@ -68,8 +70,8 @@ (define-module (guix narinfo) (define-record-type <narinfo> (%make-narinfo path uri-base uris compressions file-sizes file-hashes - nar-hash nar-size references deriver system - signature contents) + nar-hash nar-size eris-format eris-urn references deriver + system signature contents) narinfo? (path narinfo-path) (uri-base narinfo-uri-base) ;URI of the cache it originates from @@ -79,6 +81,8 @@ (define-record-type <narinfo> (file-hashes narinfo-file-hashes) (nar-hash narinfo-hash) (nar-size narinfo-size) + (eris-format narinfo-eris-format) + (eris-urn narinfo-eris-urn) (references narinfo-references) (deriver narinfo-deriver) (system narinfo-system) @@ -135,8 +139,8 @@ (define (narinfo-maker str cache-url) "Return a narinfo constructor for narinfos originating from CACHE-URL. STR must contain the original contents of a narinfo file." (lambda (path urls compressions file-hashes file-sizes - nar-hash nar-size references deriver system - signature) + nar-hash nar-size eris-format eris-urn references deriver + system signature) "Return a new <narinfo> object." (define len (length urls)) (%make-narinfo path cache-url @@ -157,6 +161,8 @@ (define len (length urls)) ((lst ...) (map string->number lst))) nar-hash (and=> nar-size string->number) + eris-format + (if eris-urn (string->uri eris-urn) #f) (string-tokenize references) (match deriver ((or #f "") #f) @@ -184,7 +190,7 @@ (define* (read-narinfo port #:optional url (narinfo-maker str url) '("StorePath" "URL" "Compression" "FileHash" "FileSize" "NarHash" "NarSize" - "References" "Deriver" "System" + "ERISFormat" "ERIS" "References" "Deriver" "System" "Signature") '("URL" "Compression" "FileSize" "FileHash")))) diff --git a/guix/scripts/publish.scm b/guix/scripts/publish.scm index 3bf3bd9c7c..76b5a429f4 100644 --- a/guix/scripts/publish.scm +++ b/guix/scripts/publish.scm @@ -40,6 +40,7 @@ (define-module (guix scripts publish) #:use-module (srfi srfi-34) #:use-module (srfi srfi-37) #:use-module (srfi srfi-71) + #:use-module (srfi srfi-171) #:use-module (web http) #:use-module (web request) #:use-module (web response) @@ -57,6 +58,7 @@ (define-module (guix scripts publish) #:use-module (guix workers) #:use-module (guix store) #:use-module ((guix serialization) #:select (write-file)) + #:use-module (eris) #:use-module (zlib) #:autoload (lzlib) (call-with-lzip-output-port make-lzip-output-port) @@ -145,6 +147,9 @@ (define %default-gzip-compression ;; Since we compress on the fly, default to fast compression. (compression 'gzip 3)) +(define %eris-zstd-compression + (compression 'zstd 19)) + (define (default-compression type) (compression type 3)) @@ -323,7 +328,8 @@ (define* (store-item->recutils store-item (define* (narinfo-string store store-path #:key (compressions (list %no-compression)) - (nar-path "nar") (file-sizes '())) + (nar-path "nar") (file-sizes '()) + eris-urn) "Generate a narinfo key/value string for STORE-PATH; an exception is raised if STORE-PATH is invalid. Produce a URL that corresponds to COMPRESSION. The narinfo is signed with KEY. NAR-PATH specifies the prefix for nar URLs. @@ -345,10 +351,10 @@ (define* (narinfo-string store store-path "\ StorePath: ~a NarHash: sha256:~a -NarSize: ~d +NarSize: ~d~@[~%ERISFormat: application/x-nix-archive+zstd-19~%ERIS: ~a~] References: ~a~%" store-path - hash size references)) + hash size eris-urn references)) ;; Do not render a "Deriver" line if we are rendering info for a ;; derivation. Also do not render a "System" line that would be ;; expensive to compute and is currently unused. @@ -633,6 +639,22 @@ (define (compressed-nar-size compression) (and stat (cons compression (stat:size stat))))) + (define (eris-encode-nar compressions) + (and (member %eris-zstd-compression compressions) + (let* ((nar (nar-cache-file cache item + #:compression %eris-zstd-compression)) + (stat (stat nar #f))) + (and stat + (call-with-input-file nar + (lambda (port) + (let ((eris-urn _ + (eris-encode port + #:block-size 'large + #:block-reducer rcount + #:convergence-secret + %null-convergence-secret))) + eris-urn))))))) + (let ((compression (actual-compressions item compressions))) (for-each (cut compress-nar cache item <>) compressions) @@ -640,7 +662,8 @@ (define (compressed-nar-size compression) (match compressions ((main others ...) (let ((narinfo (narinfo-cache-file cache item - #:compression main))) + #:compression main)) + (eris-urn (eris-encode-nar compressions))) (with-atomic-file-output narinfo (lambda (port) ;; Open a new connection to the store. We cannot reuse the main @@ -651,7 +674,8 @@ (define (compressed-nar-size compression) (display (narinfo-string store item #:nar-path nar-path #:compressions compressions - #:file-sizes sizes) + #:file-sizes sizes + #:eris-urn eris-urn) port))) ;; Make the cached narinfo world-readable, contrary to what -- 2.38.1
Information forwarded
to guix-patches@gnu.org
:
bug#52555
; Package guix-patches
.
(Thu, 29 Dec 2022 18:15:02 GMT) (full text, mbox, link).
Message #148 received at 52555@debbugs.gnu.org (full text, mbox, reply):
* guix/eris.scm: New file. * guix/eris/fs-store.scm: New file. * Makefile.am (MODULES): Add new files. * guix/scripts/publish.scm (bake-narinfo+nar): Use guix-eris-block-reducer. --- Makefile.am | 2 ++ guix/eris.scm | 36 +++++++++++++++++++++ guix/eris/fs-store.scm | 67 ++++++++++++++++++++++++++++++++++++++++ guix/scripts/publish.scm | 14 +++++---- 4 files changed, 113 insertions(+), 6 deletions(-) create mode 100644 guix/eris.scm create mode 100644 guix/eris/fs-store.scm diff --git a/Makefile.am b/Makefile.am index b54288c0fc..c549fc8580 100644 --- a/Makefile.am +++ b/Makefile.am @@ -132,6 +132,8 @@ MODULES = \ guix/least-authority.scm \ guix/read-print.scm \ guix/ipfs.scm \ + guix/eris.scm \ + guix/eris/fs-store.scm \ guix/platform.scm \ guix/platforms/arm.scm \ guix/platforms/mips.scm \ diff --git a/guix/eris.scm b/guix/eris.scm new file mode 100644 index 0000000000..29d5e7b1db --- /dev/null +++ b/guix/eris.scm @@ -0,0 +1,36 @@ +;;; GNU Guix --- Functional package management for GNU +;;; Copyright © 2022 pukkamustard <pukkamustard@posteo.net> +;;; +;;; This file is part of GNU Guix. +;;; +;;; GNU Guix is free software; you can redistribute it and/or modify it +;;; under the terms of the GNU General Public License as published by +;;; the Free Software Foundation; either version 3 of the License, or (at +;;; your option) any later version. +;;; +;;; GNU Guix is distributed in the hope that it will be useful, but +;;; WITHOUT ANY WARRANTY; without even the implied warranty of +;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +;;; GNU General Public License for more details. +;;; +;;; You should have received a copy of the GNU General Public License +;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>. + +(define-module (guix eris) + #:use-module (eris) + + #:use-module (guix config) + #:use-module (guix eris fs-store) + + #:export (guix-eris-block-reducer + + %eris-block-store-directory)) + +(define %eris-block-store-directory + (make-parameter + (or (getenv "GUIX_ERIS_BLOCK_STORE_DIRECTORY") + (string-append %state-directory "/eris")))) + +(define (guix-eris-block-reducer) + "Returns a block reducer that stores blocks of ERIS encoded content." + (eris-fs-store-reducer (%eris-block-store-directory))) diff --git a/guix/eris/fs-store.scm b/guix/eris/fs-store.scm new file mode 100644 index 0000000000..2ef7607988 --- /dev/null +++ b/guix/eris/fs-store.scm @@ -0,0 +1,67 @@ +;;; GNU Guix --- Functional package management for GNU +;;; Copyright © 2022 pukkamustard <pukkamustard@posteo.net> +;;; +;;; This file is part of GNU Guix. +;;; +;;; GNU Guix is free software; you can redistribute it and/or modify it +;;; under the terms of the GNU General Public License as published by +;;; the Free Software Foundation; either version 3 of the License, or (at +;;; your option) any later version. +;;; +;;; GNU Guix is distributed in the hope that it will be useful, but +;;; WITHOUT ANY WARRANTY; without even the implied warranty of +;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +;;; GNU General Public License for more details. +;;; +;;; You should have received a copy of the GNU General Public License +;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>. + +(define-module (guix eris fs-store) + #:use-module (rnrs io ports) + #:use-module (guix build utils) ; for mkdir-p + #:use-module (eris utils base32) + + #:export (eris-fs-store-reducer + eris-fs-store-ref)) + +;;; Commentary: +;;; +;;; This module provides a file-system based store of ERIS encoded blocks. +;;; +;;; Code: + +(define (eris-fs-store-reducer store-directory) + (case-lambda + (() (mkdir-p store-directory)) + + ((result) result) + + ((_ ref-block) + (let* ((ref (car ref-block)) + (b32 (base32-encode ref)) + (pre (substring b32 0 2)) + (suf (substring b32 2)) + (pre-dir (string-append store-directory "/" pre)) + (path (string-append pre-dir "/" suf)) + (block (cdr ref-block))) + + (mkdir-p pre-dir) + + (unless (file-exists? path) + (call-with-output-file path + (lambda (port) (put-bytevector port block)) + #:binary #t)) + + #t)))) + +(define (eris-fs-store-ref store-directory) + (lambda (ref) + (let* ((b32 (base32-encode ref)) + (pre (substring b32 0 2)) + (suf (substring b32 2)) + (path (string-append store-directory "/" pre "/" suf))) + (if (file-exists? path) + (call-with-input-file path + (lambda (port) (get-bytevector-all port)) + #:binary #t) + #f)))) diff --git a/guix/scripts/publish.scm b/guix/scripts/publish.scm index 76b5a429f4..7f14e4d4d4 100644 --- a/guix/scripts/publish.scm +++ b/guix/scripts/publish.scm @@ -52,6 +52,7 @@ (define-module (guix scripts publish) #:use-module (guix base64) #:use-module (guix config) #:use-module (guix derivations) + #:use-module (guix eris) #:use-module (gcrypt hash) #:use-module (guix pki) #:use-module (gcrypt pk-crypto) @@ -647,12 +648,13 @@ (define (eris-encode-nar compressions) (and stat (call-with-input-file nar (lambda (port) - (let ((eris-urn _ - (eris-encode port - #:block-size 'large - #:block-reducer rcount - #:convergence-secret - %null-convergence-secret))) + (let ((eris-urn + _ (eris-encode port + #:block-size 'large + #:block-reducer + (guix-eris-block-reducer) + #:convergence-secret + %null-convergence-secret))) eris-urn))))))) (let ((compression (actual-compressions item compressions))) -- 2.38.1
Information forwarded
to guix-patches@gnu.org
:
bug#52555
; Package guix-patches
.
(Thu, 29 Dec 2022 18:15:02 GMT) (full text, mbox, link).
Message #151 received at 52555@debbugs.gnu.org (full text, mbox, reply):
* guix/eris/http.scm: New file. * Makefile.am (MODULES): Add it. * guix/scripts/publish.scm (make-request-handler): Add handler for RFC 2169 URN resolution endpoint. --- Makefile.am | 1 + guix/eris/http.scm | 40 ++++++++++++++++++++++++++++++++++++++++ guix/scripts/publish.scm | 20 ++++++++++++++++++++ 3 files changed, 61 insertions(+) create mode 100644 guix/eris/http.scm diff --git a/Makefile.am b/Makefile.am index c549fc8580..373f6b7c27 100644 --- a/Makefile.am +++ b/Makefile.am @@ -134,6 +134,7 @@ MODULES = \ guix/ipfs.scm \ guix/eris.scm \ guix/eris/fs-store.scm \ + guix/eris/http.scm \ guix/platform.scm \ guix/platforms/arm.scm \ guix/platforms/mips.scm \ diff --git a/guix/eris/http.scm b/guix/eris/http.scm new file mode 100644 index 0000000000..a8a9520197 --- /dev/null +++ b/guix/eris/http.scm @@ -0,0 +1,40 @@ +;;; GNU Guix --- Functional package management for GNU +;;; Copyright © 2022 pukkamustard <pukkamustard@posteo.net> +;;; +;;; This file is part of GNU Guix. +;;; +;;; GNU Guix is free software; you can redistribute it and/or modify it +;;; under the terms of the GNU General Public License as published by +;;; the Free Software Foundation; either version 3 of the License, or (at +;;; your option) any later version. +;;; +;;; GNU Guix is distributed in the hope that it will be useful, but +;;; WITHOUT ANY WARRANTY; without even the implied warranty of +;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +;;; GNU General Public License for more details. +;;; +;;; You should have received a copy of the GNU General Public License +;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>. + +(define-module (guix eris http) + #:use-module (eris utils base32) + #:use-module (web uri) + + #:use-module (srfi srfi-2) + + #:export (make-blake2b-urn-query-ref)) + +(define blake2b-uri-path-regexp + (make-regexp "^blake2b:" regexp/icase)) + +(define (make-blake2b-urn-query-ref block-ref) + (lambda (query) + (and-let* ((_ query) ; ensure query is not false + (urn (string->uri query)) + (_ (uri? urn)) + (_ (eqv? (uri-scheme urn) 'urn)) + (_ (regexp-exec blake2b-uri-path-regexp + (uri-path urn))) + (blake2b-ref (base32-decode + (string-drop (uri-path urn) 8)))) + (block-ref blake2b-ref)))) diff --git a/guix/scripts/publish.scm b/guix/scripts/publish.scm index 7f14e4d4d4..15bdf02670 100644 --- a/guix/scripts/publish.scm +++ b/guix/scripts/publish.scm @@ -53,6 +53,8 @@ (define-module (guix scripts publish) #:use-module (guix config) #:use-module (guix derivations) #:use-module (guix eris) + #:use-module (guix eris fs-store) + #:use-module (guix eris http) #:use-module (gcrypt hash) #:use-module (guix pki) #:use-module (gcrypt pk-crypto) @@ -1083,6 +1085,14 @@ (define nar-path? (let ((expected (split-and-decode-uri-path nar-path))) (cut equal? expected <>))) + ;; Get ERIS blocks directly from the filesystem store. + (define eris-block-ref + (eris-fs-store-ref (%eris-block-store-directory))) + + ;; Create a handler for resolving blake2b URN queries. + (define blake2b-urn-query-ref + (make-blake2b-urn-query-ref eris-block-ref)) + (define (handle request body) (format #t "~a ~a~%" (request-method request) @@ -1125,6 +1135,16 @@ (define (handle request body) (("log" name) (render-log-file store request name)) + ;; /uri-res/N2R - RFC2169 URN resolution + (("uri-res" "N2R") + (let ((block (blake2b-urn-query-ref + (uri-query (request-uri request))))) + (if block + (values `((content-type . (application/octet-stream + (charset . "ISO-8859-1")))) + block) + (not-found request)))) + ;; Use different URLs depending on the compression type. This ;; guarantees that /nar URLs remain valid even when 'guix publish' ;; is restarted with different compression parameters. -- 2.38.1
Information forwarded
to guix-patches@gnu.org
:
bug#52555
; Package guix-patches
.
(Thu, 29 Dec 2022 18:15:03 GMT) (full text, mbox, link).
Message #154 received at 52555@debbugs.gnu.org (full text, mbox, reply):
* guix/eris/http.scm (eris-http-block-ref): New procedure. --- guix/eris/http.scm | 46 ++++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 44 insertions(+), 2 deletions(-) diff --git a/guix/eris/http.scm b/guix/eris/http.scm index a8a9520197..354d3be3be 100644 --- a/guix/eris/http.scm +++ b/guix/eris/http.scm @@ -18,11 +18,17 @@ (define-module (guix eris http) #:use-module (eris utils base32) + #:use-module (web uri) + #:use-module (web client) + #:use-module (web response) - #:use-module (srfi srfi-2) + #:use-module (rnrs base) + #:use-module (srfi srfi-2) ; and-let* + #:use-module (srfi srfi-71) ; extended let-syntax for multiple values - #:export (make-blake2b-urn-query-ref)) + #:export (make-blake2b-urn-query-ref + eris-http-block-ref)) (define blake2b-uri-path-regexp (make-regexp "^blake2b:" regexp/icase)) @@ -38,3 +44,39 @@ (define (make-blake2b-urn-query-ref block-ref) (blake2b-ref (base32-decode (string-drop (uri-path urn) 8)))) (block-ref blake2b-ref)))) + +(define (make-blake2b-urn ref) + (string-append "urn:blake2b:" (base32-encode ref))) + +(define (make-request-uri host ref) + (build-uri (uri-scheme host) + #:userinfo (uri-userinfo host) + #:host (uri-host host) + #:port (uri-port host) + #:path "/uri-res/N2R" + #:query (make-blake2b-urn ref))) + +(define* (eris-http-block-ref + ref + #:key host + (open-connection (lambda (host) (open-socket-for-uri host)))) + + (let* ((uri (make-request-uri host ref)) + (_ (format #t "URI: ~a\n" uri)) + (response body + (http-get uri + #:decode-body? #f + #:port (open-connection host) + #:keep-alive? #t))) + (if (eqv? (response-code response) 200) + body + #f))) + +;; (use-modules (eris) +;; (rnrs bytevectors)) + +;; (bytevector? +;; (eris-http-block-ref +;; (base32-decode +;; "4ACQM2Q5IB3DBHGKHM2WRTAXDBPMVZ7F6MG2TUXZ5QOJHW7P4N7Q") +;; #:host (string->uri "http://localhost:8081"))) -- 2.38.1
Information forwarded
to guix-patches@gnu.org
:
bug#52555
; Package guix-patches
.
(Thu, 29 Dec 2022 18:15:03 GMT) (full text, mbox, link).
Message #157 received at 52555@debbugs.gnu.org (full text, mbox, reply):
* guix/scripts/substitute.scm (process-substitution): Fetch substitutes using ERIS. * guix/eris.scm (call-with-eris-block-ref): New procedure. TODO: - When to set prefer-eris? in scripts/substitute.scm? --- guix/eris.scm | 7 +++++++ guix/scripts/substitute.scm | 42 +++++++++++++++++++++++++++++-------- 2 files changed, 40 insertions(+), 9 deletions(-) diff --git a/guix/eris.scm b/guix/eris.scm index 29d5e7b1db..d9a0914b67 100644 --- a/guix/eris.scm +++ b/guix/eris.scm @@ -23,6 +23,7 @@ (define-module (guix eris) #:use-module (guix eris fs-store) #:export (guix-eris-block-reducer + call-with-eris-block-ref %eris-block-store-directory)) @@ -34,3 +35,9 @@ (define %eris-block-store-directory (define (guix-eris-block-reducer) "Returns a block reducer that stores blocks of ERIS encoded content." (eris-fs-store-reducer (%eris-block-store-directory))) + +(define (call-with-eris-block-ref f) + (let ((fs-store-block-ref + (eris-fs-store-ref + (%eris-block-store-directory)))) + (f fs-store-block-ref))) diff --git a/guix/scripts/substitute.scm b/guix/scripts/substitute.scm index 0efa61b0d7..8cf011d7e6 100755 --- a/guix/scripts/substitute.scm +++ b/guix/scripts/substitute.scm @@ -55,12 +55,16 @@ (define-module (guix scripts substitute) #:use-module (ice-9 ftw) #:use-module (rnrs bytevectors) #:use-module (srfi srfi-1) + #:use-module (srfi srfi-2) #:use-module (srfi srfi-19) #:use-module (srfi srfi-26) #:use-module (srfi srfi-34) #:use-module (srfi srfi-35) #:use-module (srfi srfi-71) #:use-module (web uri) + #:use-module (eris) + #:use-module (eris read-capability) + #:use-module (guix eris) #:use-module (guix http-client) #:export (%allow-unauthenticated-substitutes? %reply-file-descriptor @@ -439,11 +443,12 @@ (define-syntax-rule (with-cached-connection uri port exp ...) (define* (download-nar narinfo destination #:key status-port - deduplicate? print-build-trace?) + deduplicate? print-build-trace? + prefer-eris?) "Download the nar prescribed in NARINFO, which is assumed to be authentic and authorized, and write it to DESTINATION. When DEDUPLICATE? is true, and -if DESTINATION is in the store, deduplicate its files. Print a status line to -STATUS-PORT." +if DESTINATION is in the store, deduplicate its files. When PREFER-ERIS? is +true, attempt to ERIS to get the nar. Print a status line to STATUS-PORT." (define destination-in-store? (string-prefix? (string-append (%store-prefix) "/") destination)) @@ -474,14 +479,29 @@ (define (fetch uri) #:port port #:keep-alive? #t #:buffered? #f)))) + ((urn) + (let ((read-capability (->eris-read-capability uri))) + (if (eris-read-capability? read-capability) + (call-with-eris-block-ref + (lambda (block-ref) + (values (open-eris-input-port + read-capability + #:block-ref block-ref) + #f))) + (leave (G_ "unsupported substitute URI scheme: ~a~%") + (uri->string uri))))) (else (leave (G_ "unsupported substitute URI scheme: ~a~%") (uri->string uri))))) (let ((uri compression file-size - (narinfo-best-uri narinfo - #:fast-decompression? - %prefer-fast-decompression?))) + (if (and prefer-eris? (narinfo-eris-urn narinfo)) + (values (narinfo-eris-urn narinfo) "zstd" #f) + (narinfo-best-uri narinfo + #:fast-decompression? + %prefer-fast-decompression?)))) + + (unless print-build-trace? (format (current-error-port) (G_ "Downloading ~a...~%") (uri->string uri))) @@ -631,7 +651,8 @@ (define* (process-substitution/fallback port narinfo destination (define* (process-substitution port store-item destination #:key cache-urls acl - deduplicate? print-build-trace?) + deduplicate? print-build-trace? + prefer-eris?) "Substitute STORE-ITEM (a store file name) from CACHE-URLS, and write it to DESTINATION as a nar file. Verify the substitute against ACL, and verify its hash against what appears in the narinfo. When DEDUPLICATE? is true, and if @@ -660,7 +681,8 @@ (define narinfo (download-nar narinfo destination #:status-port port #:deduplicate? deduplicate? - #:print-build-trace? print-build-trace?))) + #:print-build-trace? print-build-trace? + #:prefer-eris? prefer-eris?))) ;;; @@ -858,7 +880,9 @@ (define reply-port #:acl (current-acl) #:deduplicate? deduplicate? #:print-build-trace? - print-build-trace?) + print-build-trace? + ;; TODO when to prefer ERIS? + #:prefer-eris? #t) (loop)))))) (opts (leave (G_ "~a: unrecognized options~%") opts)))))) -- 2.38.1
Information forwarded
to guix-patches@gnu.org
:
bug#52555
; Package guix-patches
.
(Thu, 29 Dec 2022 18:15:03 GMT) (full text, mbox, link).
Message #160 received at 52555@debbugs.gnu.org (full text, mbox, reply):
--- guix/eris.scm | 25 ++++++++++++++++++++----- 1 file changed, 20 insertions(+), 5 deletions(-) diff --git a/guix/eris.scm b/guix/eris.scm index 4af17c2807..d56643bec4 100644 --- a/guix/eris.scm +++ b/guix/eris.scm @@ -54,15 +54,30 @@ (define* (try-in-order ref #:key block-refs) (try-in-order ref #:block-refs rest)))) (() #f))) +(define* (peer->block-ref peer #:key open-connection) + (case (uri-scheme peer) + + ((http https) + (lambda (ref) + (eris-http-block-ref ref + #:host peer + #:open-connection open-connection))) + + ;; unsupported ERIS peer URL + (else (lambda (_) #f)))) + (define* (guix-eris-block-ref ref #:key open-connection) (try-in-order ref #:block-refs - (list + (cons + + ;; first try and get block from local block store (lambda (ref) (eris-fs-store-ref ref #:store-directory (%eris-block-store-directory))) - (lambda (ref) - (eris-http-block-ref ref - #:host (string->uri "http://localhost:8081") - #:open-connection open-connection))))) + + ;; then try peers + (map (lambda (peer) + (peer->block-ref peer #:open-connection open-connection)) + (%eris-peers))))) -- 2.38.1
Information forwarded
to guix-patches@gnu.org
:
bug#52555
; Package guix-patches
.
(Thu, 29 Dec 2022 18:15:04 GMT) (full text, mbox, link).
Message #163 received at 52555@debbugs.gnu.org (full text, mbox, reply):
- guix/eris.scm (guix-eris-block-ref): Refactor from call-with-eris-block-ref and use eris-http-block-ref. - guix/eris/fs-store.scm (eris-fs-store-ref): Refactor to take keyword arguments. - guix/scripts/substitute.scm (download-nar): Use guix-eris-block-ref. - guix/scripts/publish.scm (make-request-handler): Use refactored eris-fs-store-ref. TODO: - default value for %eris-peers parameter in (eris) --- guix/eris.scm | 37 +++++++++++++++++++++++++++++++------ guix/eris/fs-store.scm | 21 ++++++++++----------- guix/scripts/publish.scm | 9 ++++----- guix/scripts/substitute.scm | 14 ++++++++------ 4 files changed, 53 insertions(+), 28 deletions(-) diff --git a/guix/eris.scm b/guix/eris.scm index d9a0914b67..4af17c2807 100644 --- a/guix/eris.scm +++ b/guix/eris.scm @@ -21,9 +21,13 @@ (define-module (guix eris) #:use-module (guix config) #:use-module (guix eris fs-store) + #:use-module (guix eris http) + + #:use-module (web uri) + #:use-module (ice-9 match) #:export (guix-eris-block-reducer - call-with-eris-block-ref + guix-eris-block-ref %eris-block-store-directory)) @@ -36,8 +40,29 @@ (define (guix-eris-block-reducer) "Returns a block reducer that stores blocks of ERIS encoded content." (eris-fs-store-reducer (%eris-block-store-directory))) -(define (call-with-eris-block-ref f) - (let ((fs-store-block-ref - (eris-fs-store-ref - (%eris-block-store-directory)))) - (f fs-store-block-ref))) +(define %eris-peers + (make-parameter + ;; TODO + (list (string->uri "http://localhost:8081")))) + +(define* (try-in-order ref #:key block-refs) + (match block-refs + ((block-ref . rest) + (let ((block (block-ref ref))) + (if block + block + (try-in-order ref #:block-refs rest)))) + (() #f))) + +(define* (guix-eris-block-ref ref #:key open-connection) + (try-in-order + ref + #:block-refs + (list + (lambda (ref) + (eris-fs-store-ref ref + #:store-directory (%eris-block-store-directory))) + (lambda (ref) + (eris-http-block-ref ref + #:host (string->uri "http://localhost:8081") + #:open-connection open-connection))))) diff --git a/guix/eris/fs-store.scm b/guix/eris/fs-store.scm index 2ef7607988..38f5926280 100644 --- a/guix/eris/fs-store.scm +++ b/guix/eris/fs-store.scm @@ -54,14 +54,13 @@ (define (eris-fs-store-reducer store-directory) #t)))) -(define (eris-fs-store-ref store-directory) - (lambda (ref) - (let* ((b32 (base32-encode ref)) - (pre (substring b32 0 2)) - (suf (substring b32 2)) - (path (string-append store-directory "/" pre "/" suf))) - (if (file-exists? path) - (call-with-input-file path - (lambda (port) (get-bytevector-all port)) - #:binary #t) - #f)))) +(define* (eris-fs-store-ref ref #:key store-directory) + (let* ((b32 (base32-encode ref)) + (pre (substring b32 0 2)) + (suf (substring b32 2)) + (path (string-append store-directory "/" pre "/" suf))) + (if (file-exists? path) + (call-with-input-file path + (lambda (port) (get-bytevector-all port)) + #:binary #t) + #f))) diff --git a/guix/scripts/publish.scm b/guix/scripts/publish.scm index 15bdf02670..0ce50b2942 100644 --- a/guix/scripts/publish.scm +++ b/guix/scripts/publish.scm @@ -1085,13 +1085,12 @@ (define nar-path? (let ((expected (split-and-decode-uri-path nar-path))) (cut equal? expected <>))) - ;; Get ERIS blocks directly from the filesystem store. - (define eris-block-ref - (eris-fs-store-ref (%eris-block-store-directory))) - ;; Create a handler for resolving blake2b URN queries. (define blake2b-urn-query-ref - (make-blake2b-urn-query-ref eris-block-ref)) + (make-blake2b-urn-query-ref + (lambda (ref) (eris-fs-store-ref + ref + #:store-directory (%eris-block-store-directory))))) (define (handle request body) (format #t "~a ~a~%" diff --git a/guix/scripts/substitute.scm b/guix/scripts/substitute.scm index 8cf011d7e6..14a21f6c37 100755 --- a/guix/scripts/substitute.scm +++ b/guix/scripts/substitute.scm @@ -482,12 +482,14 @@ (define (fetch uri) ((urn) (let ((read-capability (->eris-read-capability uri))) (if (eris-read-capability? read-capability) - (call-with-eris-block-ref - (lambda (block-ref) - (values (open-eris-input-port - read-capability - #:block-ref block-ref) - #f))) + (values + (open-eris-input-port + read-capability + #:block-ref (lambda (ref) + (guix-eris-block-ref + ref + #:open-connection open-connection-for-uri/cached))) + #f) (leave (G_ "unsupported substitute URI scheme: ~a~%") (uri->string uri))))) (else -- 2.38.1
Information forwarded
to guix-patches@gnu.org
:
bug#52555
; Package guix-patches
.
(Thu, 29 Dec 2022 18:15:04 GMT) (full text, mbox, link).
Message #166 received at 52555@debbugs.gnu.org (full text, mbox, reply):
* guix/eris/ipfs.scm: New files. * Makefile.am (MODULES): Add it. * guix/eris.scm (%eris-peers): Add IPFS. (peer->block-ref): Handle IPFS peer. --- Makefile.am | 1 + guix/eris.scm | 32 ++++--- guix/eris/ipfs.scm | 214 +++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 237 insertions(+), 10 deletions(-) create mode 100644 guix/eris/ipfs.scm diff --git a/Makefile.am b/Makefile.am index 373f6b7c27..6f648a40a3 100644 --- a/Makefile.am +++ b/Makefile.am @@ -135,6 +135,7 @@ MODULES = \ guix/eris.scm \ guix/eris/fs-store.scm \ guix/eris/http.scm \ + guix/eris/ipfs.scm \ guix/platform.scm \ guix/platforms/arm.scm \ guix/platforms/mips.scm \ diff --git a/guix/eris.scm b/guix/eris.scm index d56643bec4..5b0c1ee36b 100644 --- a/guix/eris.scm +++ b/guix/eris.scm @@ -22,6 +22,7 @@ (define-module (guix eris) #:use-module (guix config) #:use-module (guix eris fs-store) #:use-module (guix eris http) + #:use-module (guix eris ipfs) #:use-module (web uri) #:use-module (ice-9 match) @@ -42,8 +43,10 @@ (define (guix-eris-block-reducer) (define %eris-peers (make-parameter - ;; TODO - (list (string->uri "http://localhost:8081")))) + ;; TODO: make ERIS peers configurable somewhere + (list + (string->uri "http://localhost:8081") + 'ipfs))) (define* (try-in-order ref #:key block-refs) (match block-refs @@ -55,18 +58,27 @@ (define* (try-in-order ref #:key block-refs) (() #f))) (define* (peer->block-ref peer #:key open-connection) - (case (uri-scheme peer) + (cond + ((uri? peer) (case (uri-scheme peer) - ((http https) - (lambda (ref) - (eris-http-block-ref ref - #:host peer - #:open-connection open-connection))) + ((http https) + (lambda (ref) + (eris-http-block-ref ref + #:host peer + #:open-connection open-connection))) - ;; unsupported ERIS peer URL - (else (lambda (_) #f)))) + ;; unsupported ERIS peer URL + (else (lambda (_) #f)))) + + ((eqv? 'ipfs peer) + (lambda (ref) + (eris-ipfs-ref ref #:open-connection open-connection))))) (define* (guix-eris-block-ref ref #:key open-connection) + "Attempts to dereference a block of some ERIS encoded content with reference +REF. First the local block store is checked, followed by remote peers as +configured in the parameter %eris-peers (in order). Returns #f if the block +could not be de-referenced." (try-in-order ref #:block-refs diff --git a/guix/eris/ipfs.scm b/guix/eris/ipfs.scm new file mode 100644 index 0000000000..9771414e7b --- /dev/null +++ b/guix/eris/ipfs.scm @@ -0,0 +1,214 @@ +;;; GNU Guix --- Functional package management for GNU +;;; Copyright © 2018 Ludovic Courtès <ludo@gnu.org> +;;; Copyright © 2022 pukkamustard <pukkamustard@posteo.net> +;;; +;;; This file is part of GNU Guix. +;;; +;;; GNU Guix is free software; you can redistribute it and/or modify it +;;; under the terms of the GNU General Public License as published by +;;; the Free Software Foundation; either version 3 of the License, or (at +;;; your option) any later version. +;;; +;;; GNU Guix is distributed in the hope that it will be useful, but +;;; WITHOUT ANY WARRANTY; without even the implied warranty of +;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +;;; GNU General Public License for more details. +;;; +;;; You should have received a copy of the GNU General Public License +;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>. + + +;;; Commentary: +;;; +;;; This module provides an interface to the IPFS daemons HTTP API for storing +;;; and retrieving blocks. This can be used to store blocks of ERIS encoded +;;; content. +;;; +;;; See also the IPFS API documentation: +;;; https://docs.ipfs.io/reference/http/api/#api-v0-block-put + +(define-module (guix eris ipfs) + #:use-module (eris utils base32) + #:use-module (sodium generichash) + #:use-module (json) + #:use-module (web uri) + #:use-module (web client) + #:use-module (web response) + #:use-module (srfi srfi-71) + #:use-module (rnrs io ports) + #:use-module (rnrs bytevectors) + + #:use-module ((guix build download) + #:select ((open-connection-for-uri + . guix:open-connection-for-uri))) + #:export (%ipfs-base-url + + eris-ipfs-reducer + eris-ipfs-ref)) + + +;; CID encoding + +;; Multicodec codes +;; (https://github.com/multiformats/multicodec/blob/master/table.csv) +(define multicodec-raw-code #x55) +(define multicodec-blake2b-256-code #xb220) + +(define (blake2b-256->binary-cid hash) + "Encode a Blake2b-256 hash as binary CID" + (call-with-values + (lambda () (open-bytevector-output-port)) + (lambda (port get-bytevector) + ;; CID version + (put-u8 port 1) + ;; multicoded content-type + (put-u8 port multicodec-raw-code) + ;; set multihash to blake2b-256. This is the manually encoded varint of + ;; 0xb220 + (put-u8 port 160) (put-u8 port 228) (put-u8 port 2) + ;; set hash lenght + (put-u8 port 32) + ;; and finally the hash itself + (put-bytevector port hash) + + ;; finalize and get the bytevector + (get-bytevector)))) + +(define (binary-cid->cid bcid) + "Encode a binary CID as Base32 encoded CID" + ;; 'b' is the multibsae code for base32 + (string-append "b" + ;; the IPFS daemon uses lower-case, so to be consistent we + ;; also. + (string-downcase + ;; base32 encode the binary cid + (base32-encode bcid)))) + +(define blake2b-256->cid + (compose binary-cid->cid blake2b-256->binary-cid)) + + +;; IPFS API + +(define %ipfs-base-url + ;; URL of the IPFS gateway. + (make-parameter "http://localhost:5001")) + +(define* (call url decode + #:optional + (method http-post) + #:key port body (false-if-404? #t) (headers '()) + (keep-alive #t) + (open-connection guix:open-connection-for-uri) + (timeout 10)) + "Invoke the endpoint at URL using METHOD. Decode the resulting JSON body +using DECODE, a one-argument procedure that takes an input port; when DECODE +is false, return the input port. When FALSE-IF-404? is true, return #f upon +404 responses." + (let* ((url (if (string? url) (string->uri url) url)) + (port (or port (open-connection url #:timeout timeout))) + (response response-port + (if keep-alive + (method url #:streaming? #t + #:body body + #:port port + #:keep-alive? #t) + (method url #:streaming? #t + #:body body + #:port port + ;; IPFS daemon seems to responds with bad + ;; request if PUT requests are kept alive and + ;; do not have "Connection: close" header. + #:keep-alive? #f + #:headers `((connection close) + ,@headers))))) + (cond ((= 200 (response-code response)) + (if decode + (let ((result (decode response-port))) + (close-port response-port) + result) + response-port)) + ((and false-if-404? + (= 404 (response-code response))) + (close-port response-port) + #f) + (else + (close-port response-port) + (format #t "~a\n" response) + (throw 'ipfs-error url response))))) + +(define-syntax-rule (false-if-ipfs-error exp) + "Return $f if EXP triggers a network related or IPFS related exception." + (with-exception-handler + (lambda (exn) + (let ((kind (exception-kind exn)) + (errno (system-error-errno + (cons 'system-error (exception-args exn))))) + (cond + ((= errno ECONNREFUSED) #f) + (else (raise-exception exp))))) + (lambda () exp) + #:unwind? #t)) + +(define %multipart-boundary + ;; XXX: We might want to find a more reliable boundary. + (string-append (make-string 24 #\-) "2698127afd7425a6")) + +(define (bytevector->form-data bv port) + "Write to PORT a 'multipart/form-data' representation of BV." + (display (string-append "--" %multipart-boundary "\r\n" + "Content-Disposition: form-data\r\n" + "Content-Type: application/octet-stream\r\n\r\n") + port) + (put-bytevector port bv) + (display (string-append "\r\n--" %multipart-boundary "--\r\n") + port)) + +(define (ipfs-block-put bv) + "Store a block on IPFS and return the CID of the block" + (call (string-append (%ipfs-base-url) + "/api/v0/block/put" + "?format=raw&mhtype=blake2b-256") + (lambda (port) (assoc-ref (json->scm port) "Key")) + #:headers `((content-type + . (multipart/form-data + (boundary . ,%multipart-boundary)))) + #:body (call-with-bytevector-output-port + (lambda (port) (bytevector->form-data bv port))) + ;; IPFS daemon does not seem to accept connection re-use when putting + ;; blocks. + #:keep-alive #f)) + +(define* (ipfs-block-get cid #:key + (open-connection guix:open-connection-for-uri)) + "Get a block from IPFS via the HTTP API" + (false-if-ipfs-error + (call (string-append (%ipfs-base-url) + "/api/v0/block/get" + "?arg=" cid) + get-bytevector-all + #:timeout 5 + #:open-connection open-connection))) + +;; ERIS block reducer + +(define eris-ipfs-reducer + (case-lambda + ;; initialization. Nothing to do here. In an improved implementation we + ;; might create a single HTTP connection and reuse it for all blocks. + (() '()) + + ;; Completion. Again, nothing to do. + ((_) 'done) + + ;; store a block + ((_ ref-block) + ;; ref-block is a pair consisting of the reference to the block and the + ;; block itself. + (ipfs-block-put (cdr ref-block))))) + +(define* (eris-ipfs-ref ref #:key + (open-connection guix:open-connection-for-uri)) + "Dereference a block from IPFS" + (ipfs-block-get (blake2b-256->cid ref) + #:open-connection open-connection)) -- 2.38.1
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:
bug#52555
; Package guix-patches
.
(Sat, 14 Jan 2023 18:27:01 GMT) (full text, mbox, link).
Message #169 received at 52555@debbugs.gnu.org (full text, mbox, reply):
Hello! pukkamustard <pukkamustard@posteo.net> skribis: > I'm very happy to present a V3 of a proposal towards decentralizing substitute > distribution with ERIS. An initial version [1] and a V2 [2] are now almost a > years old! Woohoo! 👍 > The idea is to use ERIS (Encoding for Robust Immutable Storage) [3] to allow > more decentralized substitute distribution. ERIS defines an encoding of > content into uniformly sized, encrypted and content-addressed blocks > (32KiB). The content can be decoded from the blocks given a short identifier > called the read capability. It allows a network-optimized form of > content-addressing. > > Blocks can be transported over many different transport protocols, such as > HTTP, CoAP, GNUnet, IPFS or a SD card sent via pigeons. Only the read > capability must be transmited securely. Given an authentic read capability, > the content can be decoded correctly from blocks that might have been > transported over unreliable (and untrusted) protocols. Neat! (Do we have an implementation yet for SD-cards-over-pigeons?) > For Guix, substitutes (Nar files) are encoded using ERIS and the read > capability is added to the signed Narinfos. The read capability published in > the Narinfo can then be used to decode the Nar from blocks that are fetched > from many peers over many different protocols. > > This version of the patches allows blocks to be fetched over HTTP and IPFS. Nice. > A summary of this patch series: > > - Use the stable version of the ERIS encoding (version 1.0.0) > - Add two fields to Narinfos (ERIS and ERISFormat) > - Store blocks of published substitutes in a local block store (in > `/var/guix/eris`) > - Add an endpoint for resolving ERIS blocks over HTTP (a la RFC 2169) > - Use ERIS when fetching substitutes > - Use IPFS for de-referencing ERIS blocks > > Testing procedure is a bit tedious, but described in the V2: > https://issues.guix.gnu.org/52555#8-lineno16 OK. There are still I guess a number of unknowns, including the cost of ERIS support for publishers (how much disk space ‘guix publish’ will use for blocks, how much CPU is needed to compute those blocks, bandwidth usage over IFPS/HTTP) and for consumers (performance of substitution over HTTP+ERIS or IPFS+ERIS CPU-wise and bandwidth-wise). To address that, we’ll need to make it easy to test, and to make it easy to disable it if things don’t work as expected. (Perhaps this is already the case, I’m thinking out loud.) > Thanks for making it so far! :) I'd be very happy for your thoughs and > ideas. There might also be opportunity to discuss these ideas at Guix Days in > February. Definitely! I think it would be great if you could present what you’re up to and maybe make a quick demo. Thanks for the great news to begin the year! Ludo’.
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bug#52555
; Package guix-patches
.
(Sat, 14 Jan 2023 18:35:02 GMT) (full text, mbox, link).
Message #172 received at 52555@debbugs.gnu.org (full text, mbox, reply):
pukkamustard <pukkamustard@posteo.net> skribis: > * guix/scripts/publish.scm: (bake-narinfo+nar): Compute ERIS URN of compressed nars. > (narinfo-string): Add #:eris-urn parameter and honor it. > * guix/scripts/narinfo.scm: (<narinfo>)[eris-format,eris-urn]: New fields. > (narinfo-maker): Handle ERIS URN and ERIS format. > * configure.ac: (HAVE_GUILE_ERIS): New conditional. > * gnu/packages/package-management.scm: (guix)[native-inputs]: Add guile-eris. I’d suggest separating the (guix narinfo) part from the rest. > @@ -135,8 +139,8 @@ (define (narinfo-maker str cache-url) > "Return a narinfo constructor for narinfos originating from CACHE-URL. STR > must contain the original contents of a narinfo file." > (lambda (path urls compressions file-hashes file-sizes > - nar-hash nar-size references deriver system > - signature) > + nar-hash nar-size eris-format eris-urn references deriver > + system signature) Maybe make ‘eris-format’ and ‘eris-urn’ named parameters. > + (define (eris-encode-nar compressions) > + (and (member %eris-zstd-compression compressions) > + (let* ((nar (nar-cache-file cache item > + #:compression %eris-zstd-compression)) > + (stat (stat nar #f))) > + (and stat > + (call-with-input-file nar > + (lambda (port) > + (let ((eris-urn _ > + (eris-encode port > + #:block-size 'large > + #:block-reducer rcount > + #:convergence-secret > + %null-convergence-secret))) > + eris-urn))))))) I think you remove the ‘let’ and just call ‘eris-encode’ in tail position (Guile truncates multiple-value returns.) Where is ‘eris-encode’ storing the blocks? I don’t see any parameter here. I guess it should go to /var/cache/guix/publish/eris or similar. > (let ((compression (actual-compressions item compressions))) > > (for-each (cut compress-nar cache item <>) compressions) > @@ -640,7 +662,8 @@ (define (compressed-nar-size compression) > (match compressions > ((main others ...) > (let ((narinfo (narinfo-cache-file cache item > - #:compression main))) > + #:compression main)) > + (eris-urn (eris-encode-nar compressions))) > (with-atomic-file-output narinfo > (lambda (port) > ;; Open a new connection to the store. We cannot reuse the main > @@ -651,7 +674,8 @@ (define (compressed-nar-size compression) > (display (narinfo-string store item > #:nar-path nar-path > #:compressions compressions > - #:file-sizes sizes) > + #:file-sizes sizes > + #:eris-urn eris-urn) Would be nice to make ERIS encoding optional, with a command-line switch to turn it on. Ludo’.
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:
bug#52555
; Package guix-patches
.
(Sat, 14 Jan 2023 18:43:01 GMT) (full text, mbox, link).
Message #175 received at 52555@debbugs.gnu.org (full text, mbox, reply):
pukkamustard <pukkamustard@posteo.net> skribis: > * guix/eris.scm: New file. > * guix/eris/fs-store.scm: New file. > * Makefile.am (MODULES): Add new files. > * guix/scripts/publish.scm (bake-narinfo+nar): Use guix-eris-block-reducer. [...] > +(define %eris-block-store-directory > + (make-parameter > + (or (getenv "GUIX_ERIS_BLOCK_STORE_DIRECTORY") > + (string-append %state-directory "/eris")))) > + > +(define (guix-eris-block-reducer) > + "Returns a block reducer that stores blocks of ERIS encoded content." > + (eris-fs-store-reducer (%eris-block-store-directory))) Maybe this should be private to (guix scripts publish)? Also, the store directory should be /var/cache/guix/publish/eris by default IMO. > +(define (eris-fs-store-reducer store-directory) > + (case-lambda > + (() (mkdir-p store-directory)) > + > + ((result) result) > + > + ((_ ref-block) > + (let* ((ref (car ref-block)) > + (b32 (base32-encode ref)) > + (pre (substring b32 0 2)) > + (suf (substring b32 2)) > + (pre-dir (string-append store-directory "/" pre)) > + (path (string-append pre-dir "/" suf)) > + (block (cdr ref-block))) > + > + (mkdir-p pre-dir) > + > + (unless (file-exists? path) > + (call-with-output-file path > + (lambda (port) (put-bytevector port block)) > + #:binary #t)) > + > + #t)))) > + > +(define (eris-fs-store-ref store-directory) > + (lambda (ref) > + (let* ((b32 (base32-encode ref)) > + (pre (substring b32 0 2)) > + (suf (substring b32 2)) > + (path (string-append store-directory "/" pre "/" suf))) > + (if (file-exists? path) > + (call-with-input-file path > + (lambda (port) (get-bytevector-all port)) > + #:binary #t) > + #f)))) Could you add docstrings, remove tabs, and use (ice-9 match) instead of car/cdr? :-) Whole files (blocks, right?) get loaded in memory. Is that OK or should it be avoided? There are time-of-check-to-time-of-use race conditions with those ‘file-exists?’ calls. In the case of ‘ref’, you can instead write: (catch 'system-error (lambda () (call-with-input-file …)) (lambda args (if (= ENOENT (system-error-errno args)) #f (apply throw args)))) In the case of ‘reducer’, perhaps it’d be safer to write the block atomically with ‘with-atomic-file-output’? (And remove the ‘file-exists?’ check too?) Write “file” rather than “path” (the latter is used to refer to “search paths”). :-) Ludo’.
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:
bug#52555
; Package guix-patches
.
(Thu, 28 Dec 2023 09:41:02 GMT) (full text, mbox, link).
Message #178 received at 52555@debbugs.gnu.org (full text, mbox, reply):
* guix/narinfo.scm (<narinfo>)[eris-urn]: New field. (narinfo-maker): Handle new field. (read-narifno): Handle new field. (equivalent-narinfo?): Require ERIS field to be equal. --- guix/narinfo.scm | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-) diff --git a/guix/narinfo.scm b/guix/narinfo.scm index a149d9a901..5f5ed8be6f 100644 --- a/guix/narinfo.scm +++ b/guix/narinfo.scm @@ -45,6 +45,7 @@ (define-module (guix narinfo) narinfo-file-sizes narinfo-hash narinfo-size + narinfo-eris-urn narinfo-references narinfo-deriver narinfo-system @@ -69,7 +70,7 @@ (define-module (guix narinfo) (define-record-type <narinfo> (%make-narinfo path uri-base uris compressions file-sizes file-hashes - nar-hash nar-size references deriver system + nar-hash nar-size eris-urn references deriver system signature contents) narinfo? (path narinfo-path) @@ -80,6 +81,7 @@ (define-record-type <narinfo> (file-hashes narinfo-file-hashes) (nar-hash narinfo-hash) (nar-size narinfo-size) + (eris-urn narinfo-eris-urn) (references narinfo-references) (deriver narinfo-deriver) (system narinfo-system) @@ -136,7 +138,7 @@ (define (narinfo-maker str cache-url) "Return a narinfo constructor for narinfos originating from CACHE-URL. STR must contain the original contents of a narinfo file." (lambda (path urls compressions file-hashes file-sizes - nar-hash nar-size references deriver system + nar-hash nar-size eris-urn references deriver system signature) "Return a new <narinfo> object." (define len (length urls)) @@ -158,6 +160,7 @@ (define (narinfo-maker str cache-url) ((lst ...) (map string->number lst))) nar-hash (and=> nar-size string->number) + (if eris-urn (string->uri eris-urn) #f) (string-tokenize references) (match deriver ((or #f "") #f) @@ -185,7 +188,7 @@ (define* (read-narinfo port #:optional url (narinfo-maker str url) '("StorePath" "URL" "Compression" "FileHash" "FileSize" "NarHash" "NarSize" - "References" "Deriver" "System" + "ERIS" "References" "Deriver" "System" "Signature") '("URL" "Compression" "FileSize" "FileHash")))) @@ -271,7 +274,13 @@ (define (equivalent-narinfo? narinfo1 narinfo2) (narinfo-references narinfo2)) (= (narinfo-size narinfo1) - (narinfo-size narinfo2)))) + (narinfo-size narinfo2)) + + ;; When downloading substitutes with ERIS the hash is not checked. To + ;; avoid malicious substitutes we must ensure that the ERIS URN is equal. + ;; See also <https://issues.guix.gnu.org/52555#43>. + (equal? (narinfo-eris-urn narinfo1) + (narinfo-eris-urn narinfo2)))) (define %compression-methods ;; Known compression methods and a thunk to determine whether they're -- 2.41.0
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:
bug#52555
; Package guix-patches
.
(Thu, 28 Dec 2023 09:41:02 GMT) (full text, mbox, link).
Message #181 received at 52555@debbugs.gnu.org (full text, mbox, reply):
* gnu/packages/guile-xyz.scm (guile-coap): New variable. --- gnu/packages/guile-xyz.scm | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/gnu/packages/guile-xyz.scm b/gnu/packages/guile-xyz.scm index 7b44dc3167..2fc6d079a1 100644 --- a/gnu/packages/guile-xyz.scm +++ b/gnu/packages/guile-xyz.scm @@ -1457,6 +1457,38 @@ (define-public guile-aws the Guile compiler tower to generate the DSL from AWS JSON specifications.") (license license:gpl3+)))) +(define-public guile-coap + (let ((commit "1218d4f98210a14b52cf8185c9a7d39ed8b28643") + (revision "0")) + (package + (name "guile-coap") + (version (git-version "0.2.0-dev" revision commit)) + (source + (origin + (method git-fetch) + (uri (git-reference + (url "https://codeberg.org/eris/guile-coap.git") + (commit commit))) + (file-name (git-file-name name version)) + (sha256 (base32 "0mk9s4vzsi5y3sk8rs4a0jdcn6qj54nh7nwicdrsj77b9nghqwb3")))) + (build-system gnu-build-system) + (native-inputs + (list autoconf + automake + pkg-config + texinfo)) + (inputs (list guile-3.0)) + (propagated-inputs (list guile-fibers)) + (synopsis "Guile implementation of the Constrained Application Protocol (CoAP)") + (description "Gulie-CoAP is a Guile implementation of the Constrained +Application Protocol (CoAP). CoAP is a network transport protocol specialized +for use with constrained nodes and constrained networks (e.g. low-power, +lousy). This library implements basic serialization of CoAP messages over UDP +(RFC 7252) and TCP (RFC 8323) as well as an asynchronous TCP client (using +@code{guile-fibers})." ) + (home-page "https://codeberg.org/eris/guile-coap") + (license license:gpl3+)))) + (define-public guile-simple-zmq (let ((commit "d25d1865e3378d93c44e2b4f5246a70b078a489d") (revision "11")) -- 2.41.0
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:
bug#52555
; Package guix-patches
.
(Thu, 28 Dec 2023 09:41:03 GMT) (full text, mbox, link).
Message #184 received at 52555@debbugs.gnu.org (full text, mbox, reply):
* gnu/packages/guile-xyz.scm (guile-eris): Update to 1.2.0-dev. [propagated-inputs]: Add guile-coap, guile-fibers, guile-sqlite3, guile-zstd and guile-cbor. --- gnu/packages/guile-xyz.scm | 66 +++++++++++++++++++++----------------- 1 file changed, 37 insertions(+), 29 deletions(-) diff --git a/gnu/packages/guile-xyz.scm b/gnu/packages/guile-xyz.scm index 2fc6d079a1..a66a6d8ad5 100644 --- a/gnu/packages/guile-xyz.scm +++ b/gnu/packages/guile-xyz.scm @@ -5152,38 +5152,46 @@ (define-public guile-sodium (license license:gpl3+))) (define-public guile-eris - (package - (name "guile-eris") - (version "1.0.0") - (source - (origin - (method git-fetch) - (uri (git-reference - (url "https://codeberg.org/eris/guile-eris.git") - (commit (string-append "v" version)))) - (file-name (git-file-name name version)) - (sha256 (base32 "0d4wbjwwaxk0zn5gjhl86qhvk1aisgzp1vnvy4xbvrv5ydqpgyqm")))) - (build-system gnu-build-system) - (arguments '()) - (native-inputs - (list autoconf - automake - pkg-config - texinfo - ;; test dependency - guile-srfi-180 - guile-quickcheck)) - (inputs (list guile-3.0)) - (propagated-inputs - (list guile-sodium)) - (synopsis "Guile implementation of the Encoding for Robust Immutable Storage (ERIS)") - (description - "Guile-ERIS is a Guile implementation of the @url{http://purl.org/eris, + (let ((commit "98ec63cc04c7c59be8d09beed99a0ab1975829ce") + (revision "0")) + (package + (name "guile-eris") + (version (git-version "1.2.0-dev" revision commit)) + (source + (origin + (method git-fetch) + (uri (git-reference + (url "https://codeberg.org/eris/guile-eris.git") + (commit commit))) + (file-name (git-file-name name version)) + (sha256 (base32 "0n4crjqhj0ndni02xyrhwpzd325668vjbj3c1asy8wh2j50rvcs7")))) + (build-system gnu-build-system) + (arguments '()) + (native-inputs + (list autoconf + automake + pkg-config + texinfo + ;; test dependency + guile-srfi-180 + guile-quickcheck)) + (inputs (list guile-3.0)) + (propagated-inputs + (list guile-sodium + guile-coap + guile-fibers + guile-sqlite3 + guile-zstd + guile-cbor)) + (synopsis "Guile implementation of the Encoding for Robust Immutable +Storage (ERIS)") + (description + "Guile-ERIS is a Guile implementation of the @url{http://purl.org/eris, Encoding for Robust Immutable Storage (ERIS)}. ERIS allows arbitrary content to be encoded into uniformly sized, encrypted blocks that can be reassembled using a short read-capability.") - (home-page "https://codeberg.org/eris/guile-eris") - (license license:gpl3+))) + (home-page "https://codeberg.org/eris/guile-eris") + (license license:gpl3+)))) (define-public guile-r6rs-protobuf (package -- 2.41.0
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:
bug#52555
; Package guix-patches
.
(Thu, 28 Dec 2023 09:41:03 GMT) (full text, mbox, link).
Message #187 received at 52555@debbugs.gnu.org (full text, mbox, reply):
* guix/scripts/publish.scm (bake-narinfo+nar): Encode store item using ERIS. (show-help, %options): Add '--eris'. (guix-publish): Honor '--eris'. * gnu/packages/package-management.scm (guix): Add guile-eris to native-inputs. * guix/eris.scm: New file. * Makefile.am (MODULES): Add new file. --- Makefile.am | 1 + configure.ac | 5 ++ gnu/packages/package-management.scm | 1 + guix/eris.scm | 73 +++++++++++++++++++++++++++++ guix/scripts/publish.scm | 51 ++++++++++++++------ 5 files changed, 117 insertions(+), 14 deletions(-) create mode 100644 guix/eris.scm diff --git a/Makefile.am b/Makefile.am index b64dcaa77c..86da4560e4 100644 --- a/Makefile.am +++ b/Makefile.am @@ -136,6 +136,7 @@ MODULES = \ guix/least-authority.scm \ guix/read-print.scm \ guix/ipfs.scm \ + guix/eris.scm \ guix/platform.scm \ guix/platforms/arm.scm \ guix/platforms/avr.scm \ diff --git a/configure.ac b/configure.ac index ecbd596a34..7e25099c4c 100644 --- a/configure.ac +++ b/configure.ac @@ -173,6 +173,11 @@ GUILE_MODULE_AVAILABLE([have_guile_avahi], [(avahi)]) AM_CONDITIONAL([HAVE_GUILE_AVAHI], [test "x$have_guile_avahi" = "xyes"]) +dnl Check for Guile-ERIS. +GUILE_MODULE_AVAILABLE([have_guile_eris], [(eris)]) +AM_CONDITIONAL([HAVE_GUILE_ERIS], + [test "x$have_guile_eris" = "xyes"]) + dnl Guile-newt is used by the graphical installer. GUILE_MODULE_AVAILABLE([have_guile_newt], [(newt)]) diff --git a/gnu/packages/package-management.scm b/gnu/packages/package-management.scm index 97ea41df66..9c0afb70dd 100644 --- a/gnu/packages/package-management.scm +++ b/gnu/packages/package-management.scm @@ -478,6 +478,7 @@ (define-public guix ("guile-zstd" ,guile-zstd) ("guile-ssh" ,guile-ssh) ("guile-git" ,guile-git) + ("guile-eris" ,guile-eris) ;; XXX: Keep the development inputs here even though ;; they're unnecessary, just so that 'guix environment diff --git a/guix/eris.scm b/guix/eris.scm new file mode 100644 index 0000000000..d98a9a62bd --- /dev/null +++ b/guix/eris.scm @@ -0,0 +1,73 @@ +;;; GNU Guix --- Functional package management for GNU +;;; Copyright © 2022 pukkamustard <pukkamustard@posteo.net> +;;; +;;; This file is part of GNU Guix. +;;; +;;; GNU Guix is free software; you can redistribute it and/or modify it +;;; under the terms of the GNU General Public License as published by +;;; the Free Software Foundation; either version 3 of the License, or (at +;;; your option) any later version. +;;; +;;; GNU Guix is distributed in the hope that it will be useful, but +;;; WITHOUT ANY WARRANTY; without even the implied warranty of +;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +;;; GNU General Public License for more details. +;;; +;;; You should have received a copy of the GNU General Public License +;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>. + +(define-module (guix eris) + + #:use-module (eris) + #:use-module (eris fs) + #:use-module (eris sqlite) + #:use-module (eris read-capability) + + #:use-module (web uri) + #:use-module (ice-9 match) + #:use-module (srfi srfi-171) + + #:export (%eris-store-url + eris-encode-store-item)) + +(define %eris-store-url + (make-parameter + (getenv "ERIS_STORE_URL") + (lambda (val) + (cond + ((uri? val) val) + ((string? val) (string->uri val)) + (else #f))))) + +(define %guix-eris-convergence-secret + (make-parameter %null-convergence-secret)) + +(define (guix-eris-block-reducer) + "Returns an ERIS block reducer." + (if (uri? (%eris-store-url)) + (match (uri-scheme (%eris-store-url)) + + ;; Store blocks in an SQLite database (see + ;; https://eris.codeberg.page/eer/sqlite.xml) + ('sqlite + (eris-sqlite-block-reducer (uri-path (%eris-store-url)))) + + ;; TODO + ;; ('coap+unix #f) + ;; ('coap+tcp #f) + + (_ (error "Don't know how to handle ERIS store URL " + (uri->string (%eris-store-url))))) + + ;; If no ERIS store URL is provided we just compute the ERIS URN without + ;; storing the blocks anywhere. As dummy block-reducer we use `rcount` from + ;; SRFI-171 that counts the number of blocks. + rcount)) + +(define* (eris-encode-store-item item) + "Encodes the store item ITEM using ERIS and returns the read capability as +string." + (eris-read-capability->string + (eris-fs-encode item + #:convergence-secret (%guix-eris-convergence-secret) + #:block-reducer (guix-eris-block-reducer)))) diff --git a/guix/scripts/publish.scm b/guix/scripts/publish.scm index 4457be1fce..2e7138f3c7 100644 --- a/guix/scripts/publish.scm +++ b/guix/scripts/publish.scm @@ -53,6 +53,7 @@ (define-module (guix scripts publish) #:use-module (guix workers) #:use-module (guix store) #:use-module ((guix serialization) #:select (write-file)) + #:use-module (guix eris) #:use-module (zlib) #:autoload (lzlib) (call-with-lzip-output-port make-lzip-output-port) @@ -96,6 +97,8 @@ (define (show-help) (display (G_ " --cache-bypass-threshold=SIZE serve store items below SIZE even when not cached")) + (display (G_ " + --eris[=STORE] encode items using ERIS and publish blocks to STORE")) (display (G_ " --workers=N use N workers to bake items")) (display (G_ " @@ -218,6 +221,9 @@ (define %options (lambda (opt name arg result) (alist-cons 'workers (string->number* arg) result))) + (option '("eris") #f #t + (lambda (opt name arg result) + (alist-cons 'eris (or arg #t) result))) (option '("ttl") #t #f (lambda (opt name arg result) (let ((duration (string->duration arg))) @@ -319,7 +325,8 @@ (define* (store-item->recutils store-item (define* (narinfo-string store store-path #:key (compressions (list %no-compression)) - (nar-path "nar") (file-sizes '())) + (nar-path "nar") (file-sizes '()) + eris-urn) "Generate a narinfo key/value string for STORE-PATH; an exception is raised if STORE-PATH is invalid. Produce a URL that corresponds to COMPRESSION. The narinfo is signed with KEY. NAR-PATH specifies the prefix for nar URLs. @@ -341,10 +348,10 @@ (define* (narinfo-string store store-path "\ StorePath: ~a NarHash: sha256:~a -NarSize: ~d +NarSize: ~d~@[~%ERIS: ~a~] References: ~a~%" store-path - hash size references)) + hash size eris-urn references)) ;; Do not render a "Deriver" line if we are rendering info for a ;; derivation. Also do not render a "System" line that would be ;; expensive to compute and is currently unused. @@ -530,7 +537,7 @@ (define (bypass-cache? store item) (define* (render-narinfo/cached store request hash #:key ttl (compressions (list %no-compression)) (nar-path "nar") negative-ttl - cache pool) + cache pool eris?) "Respond to the narinfo request for REQUEST. If the narinfo is available in CACHE, then send it; otherwise, return 404 and \"bake\" that nar and narinfo requested using POOL." @@ -575,7 +582,8 @@ (define* (render-narinfo/cached store request hash (bake-narinfo+nar cache item #:ttl ttl #:compressions compressions - #:nar-path nar-path))) + #:nar-path nar-path + #:eris? eris?))) (when ttl (single-baker 'cache-cleanup @@ -636,7 +644,8 @@ (define (compress-nar cache item compression) (define* (bake-narinfo+nar cache item #:key ttl (compressions (list %no-compression)) - (nar-path "/nar")) + (nar-path "/nar") + (eris? #f)) "Write the narinfo and nar for ITEM to CACHE." (define (compressed-nar-size compression) (let* ((nar (nar-cache-file cache item #:compression compression)) @@ -644,7 +653,10 @@ (define* (bake-narinfo+nar cache item (and stat (cons compression (stat:size stat))))) - (let ((compression (actual-compressions item compressions))) + (let ((compression (actual-compressions item compressions)) + (eris-urn (if eris? + (eris-encode-store-item item) + #f))) (for-each (cut compress-nar cache item <>) compressions) @@ -662,7 +674,8 @@ (define* (bake-narinfo+nar cache item (display (narinfo-string store item #:nar-path nar-path #:compressions compressions - #:file-sizes sizes) + #:file-sizes sizes + #:eris-urn eris-urn) port))) ;; Make the cached narinfo world-readable, contrary to what @@ -1060,7 +1073,8 @@ (define* (make-request-handler store cache pool narinfo-ttl narinfo-negative-ttl (nar-path "nar") - (compressions (list %no-compression))) + (compressions (list %no-compression)) + (eris? #f)) (define compression-type? string->compression-type) @@ -1092,7 +1106,8 @@ (define* (make-request-handler store #:ttl narinfo-ttl #:negative-ttl narinfo-negative-ttl #:nar-path nar-path - #:compressions compressions) + #:compressions compressions + #:eris? eris?) (render-narinfo store request hash #:ttl narinfo-ttl #:negative-ttl narinfo-negative-ttl @@ -1162,7 +1177,7 @@ (define* (run-publish-server socket store advertise? port (compressions (list %no-compression)) (nar-path "nar") narinfo-ttl narinfo-negative-ttl - cache pool) + cache pool eris?) (when advertise? (let ((name (service-name))) ;; XXX: Use a callback from Guile-Avahi here, as Avahi can pick a @@ -1178,7 +1193,8 @@ (define* (run-publish-server socket store #:nar-path nar-path #:narinfo-ttl narinfo-ttl #:narinfo-negative-ttl narinfo-negative-ttl - #:compressions compressions) + #:compressions compressions + #:eris? eris?) concurrent-http-server `(#:socket ,socket))) @@ -1262,6 +1278,7 @@ (define-command (guix-publish . args) (repl-port (assoc-ref opts 'repl)) (cache (assoc-ref opts 'cache)) (workers (assoc-ref opts 'workers)) + (eris? (assoc-ref opts 'eris)) ;; Read the key right away so that (1) we fail early on if we can't ;; access them, and (2) we can then drop privileges. @@ -1281,7 +1298,8 @@ (define-command (guix-publish . args) (%private-key private-key) (cache-bypass-threshold (or (assoc-ref opts 'cache-bypass-threshold) - (cache-bypass-threshold)))) + (cache-bypass-threshold))) + (%eris-store-url (assoc-ref opts 'eris))) (if (eq? style 'systemd) (info (G_ "publishing (started via socket activation)~%")) (info (G_ "publishing ~a on ~a, port ~d~%") @@ -1289,6 +1307,10 @@ (define-command (guix-publish . args) (inet-ntop (sockaddr:fam address) (sockaddr:addr address)) (sockaddr:port address))) + (when (string? (assoc-ref opts 'eris)) + (info (G_ "publishing ERIS blocks to ~a~%") + (assoc-ref opts 'eris))) + (for-each (lambda (compression) (info (G_ "using '~a' compression method, level ~a~%") (compression-type compression) @@ -1312,7 +1334,8 @@ (define-command (guix-publish . args) #:nar-path nar-path #:compressions compressions #:narinfo-negative-ttl negative-ttl - #:narinfo-ttl ttl)))))) + #:narinfo-ttl ttl + #:eris? eris?)))))) ;;; Local Variables: ;;; eval: (put 'single-baker 'scheme-indent-function 1) -- 2.41.0
Information forwarded
to guix@cbaines.net, dev@jpoiret.xyz, ludo@gnu.org, othacehe@gnu.org, rekado@elephly.net, zimon.toutoune@gmail.com, me@tobias.gr, guix-patches@gnu.org
:
bug#52555
; Package guix-patches
.
(Thu, 28 Dec 2023 09:41:04 GMT) (full text, mbox, link).
Message #190 received at 52555@debbugs.gnu.org (full text, mbox, reply):
* guix/eris.scm (open-coap-unix-socket): New procedure. (guix-eris-block-reducer): Handle coap+unix URIs. * guix/publish.scm (bake-narinfo+nar): Start a fibers scheduler when encoding item with ERIS. --- guix/eris.scm | 63 ++++++++++++++++++++++++++++++---------- guix/scripts/publish.scm | 9 +++++- 2 files changed, 56 insertions(+), 16 deletions(-) diff --git a/guix/eris.scm b/guix/eris.scm index d98a9a62bd..3fbedd0cb7 100644 --- a/guix/eris.scm +++ b/guix/eris.scm @@ -21,8 +21,11 @@ (define-module (guix eris) #:use-module (eris) #:use-module (eris fs) #:use-module (eris sqlite) + #:use-module (eris coap) #:use-module (eris read-capability) + #:use-module (coap tcp) + #:use-module (web uri) #:use-module (ice-9 match) #:use-module (srfi srfi-171) @@ -42,27 +45,57 @@ (define %eris-store-url (define %guix-eris-convergence-secret (make-parameter %null-convergence-secret)) +(define (open-coap-unix-socket path) + (let ((sock (socket PF_UNIX SOCK_STREAM 0))) + ;; Release FD on exec + (fcntl sock F_SETFD FD_CLOEXEC) + ;; Set to non-blocking + (fcntl sock F_SETFL (logior O_NONBLOCK (fcntl sock F_GETFL))) + ;; Connect + (connect sock AF_UNIX path) + + ;; Initialize the CoAP connection + (open-socket-for-uri #f + #:socket sock + ;; Allow up to 64 in-flight requests + #:nstart 64))) + (define (guix-eris-block-reducer) "Returns an ERIS block reducer." - (if (uri? (%eris-store-url)) - (match (uri-scheme (%eris-store-url)) + (let ((store-url (%eris-store-url))) + (if (uri? store-url) + (match (uri-scheme store-url) + + ;; Store blocks in an SQLite database (see + ;; https://eris.codeberg.page/eer/sqlite.xml) + ('sqlite + (eris-sqlite-block-reducer (uri-path store-url))) - ;; Store blocks in an SQLite database (see - ;; https://eris.codeberg.page/eer/sqlite.xml) - ('sqlite - (eris-sqlite-block-reducer (uri-path (%eris-store-url)))) + ;; Connect to a CoAP ERIS store over a Unix socket + ('coap+unix + ;; Wrap the eris-coap-block-reducer to close the provided connection. + (let ((ecbr (eris-coap-block-reducer + (build-uri 'coap #:path ".well-known/eris") + #:nstart 64 + #:connection (open-coap-unix-socket + (uri-path store-url))))) + (case-lambda + (() (ecbr)) + ((conn ref-block) (ecbr conn ref-block)) + ((conn) + (ecbr conn) + (close-port conn))))) - ;; TODO - ;; ('coap+unix #f) - ;; ('coap+tcp #f) + ;; TODO + ;; ('coap+tcp #f) - (_ (error "Don't know how to handle ERIS store URL " - (uri->string (%eris-store-url))))) + (_ (error "Don't know how to handle ERIS store URL " + (uri->string (%eris-store-url))))) - ;; If no ERIS store URL is provided we just compute the ERIS URN without - ;; storing the blocks anywhere. As dummy block-reducer we use `rcount` from - ;; SRFI-171 that counts the number of blocks. - rcount)) + ;; If no ERIS store URL is provided we just compute the ERIS URN without + ;; storing the blocks anywhere. As dummy block-reducer we use `rcount` from + ;; SRFI-171 that counts the number of blocks. + rcount))) (define* (eris-encode-store-item item) "Encodes the store item ITEM using ERIS and returns the read capability as diff --git a/guix/scripts/publish.scm b/guix/scripts/publish.scm index 2e7138f3c7..0b61354327 100644 --- a/guix/scripts/publish.scm +++ b/guix/scripts/publish.scm @@ -54,6 +54,7 @@ (define-module (guix scripts publish) #:use-module (guix store) #:use-module ((guix serialization) #:select (write-file)) #:use-module (guix eris) + #:use-module (fibers) #:use-module (zlib) #:autoload (lzlib) (call-with-lzip-output-port make-lzip-output-port) @@ -655,7 +656,13 @@ (define* (bake-narinfo+nar cache item (let ((compression (actual-compressions item compressions)) (eris-urn (if eris? - (eris-encode-store-item item) + ;; Encode with fibers. + ;; XXX: There seems to be some buggy interactions when + ;; running a fibers scheduler and connecting to the + ;; store. + (run-fibers (lambda () + (eris-encode-store-item item)) + #:drain? #t) #f))) (for-each (cut compress-nar cache item <>) compressions) -- 2.41.0
Information forwarded
to guix@cbaines.net, dev@jpoiret.xyz, ludo@gnu.org, othacehe@gnu.org, rekado@elephly.net, zimon.toutoune@gmail.com, me@tobias.gr, guix-patches@gnu.org
:
bug#52555
; Package guix-patches
.
(Thu, 28 Dec 2023 09:41:04 GMT) (full text, mbox, link).
Message #193 received at 52555@debbugs.gnu.org (full text, mbox, reply):
* guix/scripts/substitute.scm: Decode substitutes using ERIS. * guix/eris.scm (eris-decode-store-item): New function. * nix/nix-daemon/guix-daemon.cc (options): Add eris-store-url option. --- guix/eris.scm | 45 +++++++++++++++++---- guix/scripts/substitute.scm | 76 +++++++++++++++++++++++++++-------- nix/nix-daemon/guix-daemon.cc | 5 +++ 3 files changed, 102 insertions(+), 24 deletions(-) diff --git a/guix/eris.scm b/guix/eris.scm index 3fbedd0cb7..1aa52e69dd 100644 --- a/guix/eris.scm +++ b/guix/eris.scm @@ -21,6 +21,7 @@ (define-module (guix eris) #:use-module (eris) #:use-module (eris fs) #:use-module (eris sqlite) + #:use-module (sqlite3) #:use-module (eris coap) #:use-module (eris read-capability) @@ -31,7 +32,8 @@ (define-module (guix eris) #:use-module (srfi srfi-171) #:export (%eris-store-url - eris-encode-store-item)) + eris-encode-store-item + eris-decode-store-item)) (define %eris-store-url (make-parameter @@ -83,8 +85,7 @@ (define (guix-eris-block-reducer) (() (ecbr)) ((conn ref-block) (ecbr conn ref-block)) ((conn) - (ecbr conn) - (close-port conn))))) + (ecbr conn))))) ;; TODO ;; ('coap+tcp #f) @@ -97,10 +98,40 @@ (define (guix-eris-block-reducer) ;; SRFI-171 that counts the number of blocks. rcount))) +(define (call-with-guix-eris-block-ref proc) + (let ((store-url (%eris-store-url))) + (if (uri? store-url) + (match (uri-scheme store-url) + + ('sqlite + (let ((db (eris-sqlite-open (uri-path store-url)))) + (proc (lambda (ref) (eris-sqlite-ref db ref))) + (sqlite-close db))) + + ('coap+unix + (let ((conn (open-coap-unix-socket (uri-path store-url))) + (req-uri (build-uri 'coap #:path ".well-known/eris"))) + (proc + (lambda (ref) + (eris-coap-block-ref req-uri ref #:connection conn))) + (close-port conn))) + + (_ (error "Don't know how to handle ERIS store URL " + (uri->string (%eris-store-url))))) + + (error "No ERIS store to get blocks.")))) + (define* (eris-encode-store-item item) "Encodes the store item ITEM using ERIS and returns the read capability as string." - (eris-read-capability->string - (eris-fs-encode item - #:convergence-secret (%guix-eris-convergence-secret) - #:block-reducer (guix-eris-block-reducer)))) + (eris-fs-encode item + #:convergence-secret (%guix-eris-convergence-secret) + #:block-reducer (guix-eris-block-reducer))) + +(define* (eris-decode-store-item eris-urn destination) + "Decode a store item with read-capability ERIS-URN to DESTINATION." + (call-with-guix-eris-block-ref + (lambda (block-ref) + (eris-fs-decode eris-urn destination + #:block-ref block-ref) + #t))) diff --git a/guix/scripts/substitute.scm b/guix/scripts/substitute.scm index 37cd08e289..3c060f1c89 100755 --- a/guix/scripts/substitute.scm +++ b/guix/scripts/substitute.scm @@ -45,6 +45,8 @@ (define-module (guix scripts substitute) . guix:open-connection-for-uri))) #:autoload (gnutls) (error/invalid-session error/again error/interrupted) #:use-module (guix progress) + #:use-module (guix eris) + #:use-module (fibers) #:use-module ((guix build syscalls) #:select (set-thread-name)) #:use-module (ice-9 rdelim) @@ -656,9 +658,11 @@ (define* (process-substitution/fallback port narinfo destination (() (loop rest))))))) + (define* (process-substitution port store-item destination #:key cache-urls acl - deduplicate? print-build-trace?) + deduplicate? print-build-trace? + (eris? #f)) "Substitute STORE-ITEM (a store file name) from CACHE-URLS, and write it to DESTINATION as a nar file. Verify the substitute against ACL, and verify its hash against what appears in the narinfo. When DEDUPLICATE? is true, and if @@ -674,20 +678,56 @@ (define* (process-substitution port store-item destination (leave (G_ "no valid substitute for '~a'~%") store-item)) - (guard (c ((network-error? c) - (format (current-error-port) - (G_ "retrying download of '~a' with other substitute URLs...~%") - store-item) - (process-substitution/fallback port narinfo destination - #:cache-urls cache-urls - #:acl acl - #:deduplicate? deduplicate? - #:print-build-trace? - print-build-trace?))) - (download-nar narinfo destination - #:status-port port - #:deduplicate? deduplicate? - #:print-build-trace? print-build-trace?))) + (if (and eris? + (%eris-store-url) + (narinfo-eris-urn narinfo)) + + (unless + + ;; Attempt to fetch substitute via ERIS + (let ((eris-urn (narinfo-eris-urn narinfo))) + (format (current-error-port) + (G_ "Downloading ~a...~%") (uri->string eris-urn)) + (run-fibers + (lambda () + (guard + (c (else + (format (current-error-port) + (G_ "failed to decode substitute from ERIS URN ~a: ~a" + (uri->string eris-urn) + c)) + #f)) + (eris-decode-store-item eris-urn destination) + ;; Tell the daemon that we're done. + (format port "success ~a ~a~%" + (narinfo-hash narinfo) (narinfo-size narinfo)))))) + + ;; Retry without ERIS on failure. + (process-substitution port store-item destination + #:cache-urls cache-urls + #:acl acl + #:deduplicate? deduplicate? + #:print-build-trace? print-build-trace? + #:eris? #f)) + + (guard (c ((network-error? c) + (format (current-error-port) + (G_ "retrying download of '~a' with other substitute URLs...~%") + store-item) + (process-substitution/fallback port narinfo destination + #:cache-urls cache-urls + #:acl acl + #:deduplicate? deduplicate? + #:print-build-trace? + print-build-trace?))) + (download-nar narinfo destination + #:status-port port + #:deduplicate? deduplicate? + #:print-build-trace? print-build-trace?)))) + + + + ;;; @@ -876,7 +916,8 @@ (define-command (guix-substitute . args) ;; Download STORE-PATH and store it as a Nar in file DESTINATION. ;; Specify the number of columns of the terminal so the progress ;; report displays nicely. - (parameterize ((current-terminal-columns (client-terminal-columns))) + (parameterize ((current-terminal-columns (client-terminal-columns)) + (%eris-store-url (find-daemon-option "eris-store-url"))) (let loop () (match (read-line) ((? eof-object?) @@ -887,7 +928,8 @@ (define-command (guix-substitute . args) #:acl (current-acl) #:deduplicate? deduplicate? #:print-build-trace? - print-build-trace?) + print-build-trace? + #:eris? #t) (loop)))))) (opts (leave (G_ "~a: unrecognized options~%") opts)))))) diff --git a/nix/nix-daemon/guix-daemon.cc b/nix/nix-daemon/guix-daemon.cc index d7ab9c5e64..d6b054bc6c 100644 --- a/nix/nix-daemon/guix-daemon.cc +++ b/nix/nix-daemon/guix-daemon.cc @@ -90,6 +90,7 @@ builds derivations on behalf of its clients."); #define GUIX_OPT_MAX_SILENT_TIME 19 #define GUIX_OPT_LOG_COMPRESSION 20 #define GUIX_OPT_DISCOVER 21 +#define GUIX_OPT_ERIS_STORE_URL 22 static const struct argp_option options[] = { @@ -132,6 +133,8 @@ static const struct argp_option options[] = n_("use the specified compression type for build logs") }, { "discover", GUIX_OPT_DISCOVER, "yes/no", OPTION_ARG_OPTIONAL, n_("use substitute servers discovered on the local network") }, + { "eris-store-url", GUIX_OPT_ERIS_STORE_URL, n_("URL"), 0, + n_("use URL to retrieve blocks of ERIS encoded substitutes") }, /* '--disable-deduplication' was known as '--disable-store-optimization' up to Guix 0.7 included, so keep the alias around. */ @@ -270,6 +273,8 @@ parse_opt (int key, char *arg, struct argp_state *state) useDiscover = string_to_bool (arg); settings.set ("discover", useDiscover ? "true" : "false"); break; + case GUIX_OPT_ERIS_STORE_URL: + settings.set ("eris-store-url", arg); case GUIX_OPT_DEBUG: verbosity = lvlDebug; break; -- 2.41.0
Information forwarded
to guix-patches@gnu.org
:
bug#52555
; Package guix-patches
.
(Thu, 28 Dec 2023 09:41:04 GMT) (full text, mbox, link).
Message #196 received at 52555@debbugs.gnu.org (full text, mbox, reply):
Dear Guix, This is the V4 of a proposal towards decentralized subsitute distirbution using the ERIS encoding. The initial proposal was submitted in December 2021, V2 and V3 a year later in 2022. All is still very much work-in-progress, but I'm happy to submit it as is to keep up with good old traditions. Thank you also for all the valuable comments and feedback via mail and live at Guix Days last year. Sorry for being so slow to react. The general idea of the proposal is to use ERIS (http://purl.org/eris) for substitute distribution. This allows substitutes to be shared over various protocols such as IPFS, GNUnet, NNCP, HTTP, CoAP, a USB stick or some Spritely-esque fun. ERIS itself defines an encoding of content into uniformly sized, encrypted and content-addressed blocks. The original content can be decoded with a short read capability that can be encoded as an URN and access to the blocks that make up the content. Blocks can be shared over different protocols with low security requirements on the transport layer itself. Read capabilities need to be shared in a secure manner. This series does following: - Adds an `ERIS` field holding the ERIS read capability of a substitute to the Narinfo as published by `guix publish` - Allows the daemon/substitute script to decode content using the ERIS URN instead of fetching a substitute via HTTP. ## Changes to previous version ### Fibers When encoding and decoding it is important for performance to be able to fetch multiple blocks concurrently (from potentially multiple peers). For this we use Guile fibers. Fiberization is currently very crude as there seem to be weird interactions with the parallization strategies currently used by `guix publish` and `guix substitute`. Help here is extremely welcome. ### ERIS-FS In previous versions we encoded the Nar-file of the susbstitute. In this version we use a specialized encoding of file-system trees for ERIS: ERIS-FS (https://eris.codeberg.page/eer/eris-fs.xml). ERIS-FS allows de-duplication of files and much easier parlallized decoding of substitutes. The ideas are similar to the custom encoding defined for substitutes over IPFS (https://issues.guix.gnu.org/33899). One major consequence is that the SHA256 sum of the Nar file as published in the Narinfo is no longer used to verify integrity of downloaded susbtitute. Instead we must ensure that the `ERIS` field in the Narinfo is trusted, `equivalent-narinfo?` and such have been changed towards this. Thanks to Maxime for pointing out this subtlety! ### External Block Store Daemon Ludovic Courtès <ludo@gnu.org> writes: > Also, the store directory should be /var/cache/guix/publish/eris by > default IMO. This comment caused a lot of pondering and hacking! :) The problem seems to be that two processes need to be able to access the block store securely: `guix publish` when publishing substitutes and the Guix daemon when fetching substitutes (blocks need to be stored when fetching for de-duplication). `guix publish` is usually run as a non-privileged user, whereas the Guix daemon runs with much higher privileges. The block store needs to be secure in the sense that manipulating blocks should be prevented by less privileged processes. I'm afraid the only solution I came up with is that the block store is not a Unix directory or database, but a daemon that listens on a Unix Socket. Enter Kapla (https://codeberg.org/eris/kapla). Kapla is a Guile program that stores and transports blocks. The Guix daemon (via substitute scripts) and the `guix publish` server talk to Kapla over a Unix socket. Kapla stores blocks in a database (SQlite) and connects with multiple peers and/or services such as IPFS/GNUnet to get blocks. I was fighting such an architecture for a long time. I would have preferred if the Guix daemon and `guix publish` simply use a library for everything instead of relying on another external service. However, there seem to be some advantages: - Managing peers seem to be quite complex and stateful. Maybe better if this is externalized from Guix proper. - The block storage and transport mechanisms can be used to share any files (try `kapla encode my-file` and `kapla decode ...`). - We can experiment with more transports quicker in a service external to Guix and include dependencies that might not make sense to have in Guix proper. The protocol that is used to talk to the external block store is CoAP over Unix Sockets or TCP. Kapla is not the only software that speaks this protocol. There is also a Golang block store that can be used (https://codeberg.org/eris/eris-go). ### CoAP for block transport Currently the protocol over which blocks are transported over networks is the Constrained Application Protocol (CoAP) (https://eris.codeberg.page/eer/coap.xml). CoAP is well suited as it allows multiple asynchronous in-flight requests (unlike HTTP 1.1). This is important for parallizing block retrieval. It also allows bi-directional requests, making it attractive for more peer-to-peer systems where some peers might not have a public IP. As it is designed for constrained environment it is quite simple and the implementation we use is in pure Guile. More block transports can be added by implementing them in Kapla (e.g. IPFS or GNUnet) or using something completely different than Kapla that speaks CoAP over Unix Sockets (such as eris-go that also can use NNCP for block transport). ### Comments to V3 I hope to have addressed all comments to the V3 (Thanks Ludo!). This included things like organizing commits differently, using (ice-9 match) and how to handle multiple return values. ## Testing Testing is a bit complicated. We need to find a better and more systematic way of doing so. Suggestions are very welcome! Manually this is how to do it: 1. Authorize local substitutes We will be running a local substitute server so we need to add the local signing key to the list of authorized keys. In the system configurations: ``` (modify-services %base-services (guix-service-type config => (guix-configuration (inherit config) (authorized-keys (cons* ;; allow substitutes from ourselves for testing purposes (local-file "/etc/signing-key.pub") %default-authorized-guix-keys))))) ``` 2. Configure the local Guix checkout #+BEGIN_SRC shell ./bootstrap && ./configure --localstatedir=/var --sysconfdir=/etc && make #+END_SRC The ~--sysconfdir~ is required so that guix will use the ACL in ~/etc/guix/acl~. 3. Start a Kapla daemon: ``` ./pre-inst-env guix build kapla -- kaplad -d ``` The `-d` option enables debug output. Kapla will listen for connection on a Unix socket. The path will be output, e.g.: ``` 2023-12-23 15:10:23 (INFO): Listening on Unix socket /run/user/1000/eris.sock ``` 3. Build some package that we will ``` $ ./pre-inst-env guix build libchop --no-grafts /gnu/store/60m6qih391rq95ck64am8ir64z0sv0zr-libchop-0.5.2 ``` 4. Start a local publish server ``` sudo -E ./pre-inst-env guix publish --public-key=/etc/guix/signing-key.pub --private-key=/etc/guix/signing-key.sec --cache=/tmp/guix-publish-cache/ --eris=coap+unix:///run/user/1000/eris.sock ``` I need to run it with sudo in order to be able to use the proper signing keys. The `--eris=STORE_URL` option defines where to store blocks. `--eris` can also be provided without a URL which will cause the ERIS read capability to be computed but blocks won't be stored anywhere. See "Proposed Deployment" on when this might make sense. 5. Get the narinfo from the publish server ``` $ curl http://localhost:8080/60m6qih391rq95ck64am8ir64z0sv0zr.narinfo StorePath: /gnu/store/60m6qih391rq95ck64am8ir64z0sv0zr-libchop-0.5.2 NarHash: sha256:1i2hhzw81qfsba0d1b09ax13694imgjrpay0122gqll85dx7k7ml NarSize: 1021984 ERIS: urn:eris:BIARSURIJ3WYLEINE6W5ZF7LKTIHL42AE367TQ355ORW5UZVSTQGT5H5T2OLKF7XICML3VHLTLMDWXLUCQVKHRKNVREV3GMVX3J5RMT4GU References: 1i0iz5rgixyva0zy4bmaasjil2683xrn-mit-krb5-1.20 2w976k6g70gkfih9wwhalqsni209vcqz-gdbm-1.23 4p1l5bdxxbyyqc3wh0d07jv9rp1pdcy7-guile-2.0.14 60m6qih391rq95ck64am8ir64z0sv0zr-libchop-0.5.2 620h3panf2lss42ns625rlay522g2hza-tdb-1.4.7 8y0pwifz8a3d7zbdfzsawa1amf4afx1s-libgcrypt-1.10.1 930nwsiysdvy2x5zv1sf6v7ym75z8ayk-gcc-11.3.0-lib gsjczqir1wbz8p770zndrpw4rnppmxi3-glibc-2.35 m9wi9hcrf7f9dm4ri32vw1jrbh1csywi-libgpg-error-1.45 pl09vk5g3cl8fxfln2hjk996pyahqk8m-bzip2-1.0.8 r5saysi65chivbv3y65nzsisx8rypp76-libtirpc-1.3.1 rib9g2ig1xf3kclyl076w28parmncg4k-bash-minimal-5.1.16 slzq3zqwj75lbrg4ly51hfhbv2vhryv5-zlib-1.2.13 z4likj1rnshd81hr0vwvwhdxpfwa1rz7-lzo-2.10 Deriver: zcly5fm6rsqis9csk33i7zfqjidjzy1a-libchop-0.5.2.drv Signature: 1;strawberry;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 URL: nar/gzip/60m6qih391rq95ck64am8ir64z0sv0zr-libchop-0.5.2 Compression: gzip FileSize: 345576 ``` Note the new `ERIS` field. You might have to get the narinfo twice for all the fields to appear. The ERIS read capability URN (urn:eris:BIARSURIJ...) contains enough information to decode the substitute. If you look at the kaplad log output you will see that some blocks were stored. You could now run: ``` kapla decode urn:eris:BIARSURIJ3WYLEINE6W5ZF7LKTIHL42AE367TQ355ORW5UZVSTQGT5H5T2OLKF7XICML3VHLTLMDWXLUCQVKHRKNVREV3GMVX3J5RMT4GU out ``` to decode the substitute to the folder out. The Guix daemon can do the same when getting substitutes. 6. Remove the libchop store item: ``` guix gc -D /gnu/store/60m6qih391rq95ck64am8ir64z0sv0zr-libchop-0.5.2 ``` 7. Start the guix daemon from the checkout: ``` sudo -E ./pre-inst-env guix-daemon --build-users-group=guixbuild --eris-store-url=coap+unix:///run/user/1001/eris.sock --substitute-urls=http://localhost:8080/ ``` Note that the `--eris-store-url` argument points to the same store as what we used for the publish server - the blocks come go to and come from the same place. We need to use the local publish server for getting the narinfo with the `ERIS` field. 8. Get the substitute: ``` ./pre-inst-env guix build libchop --no-grafts substitute: updating substitutes from 'http://localhost:8080/'.substitute: updating substitutes from 'http://localhost:8080/'.substitute: updating substitutes from 'http://localhost:8080/'.substitute: updating substitutes from 'http://localhost:8080/'.substitute: updating substitutes from 'http://localhost:8080/'.substitute: updating substitutes from 'http://localhost:8080/'.substitute: updating substitutes from 'http://localhost:8080/'.substitute: updating substitutes from 'http://localhost:8080/'.substitute: updating substitutes from 'http://localhost:8080/'... 100.0% 0.3 MB will be downloaded: /gnu/store/60m6qih391rq95ck64am8ir64z0sv0zr-libchop-0.5.2 substituting /gnu/store/60m6qih391rq95ck64am8ir64z0sv0zr-libchop-0.5.2... Downloading urn:eris:BIARSURIJ3WYLEINE6W5ZF7LKTIHL42AE367TQ355ORW5UZVSTQGT5H5T2OLKF7XICML3VHLTLMDWXLUCQVKHRKNVREV3GMVX3J5RMT4GU... /gnu/store/60m6qih391rq95ck64am8ir64z0sv0zr-libchop-0.5.2 ``` Substitute was fetched using ERIS! The daemon automatically tries to use ERIS when the `--eris-store-url` is passed and the narinfo has a signed ERIS field. If not it will fetch substitutes using HTTP. On failures while using ERIS it will also revert back to getting substitutes via HTTP. 9. Restart your system guix daemon ``` sudo herd restart guix-daemon ``` 10. Figure out a better way to test this. ## Proposed Deployment As an initial deployment it would be nice if the official Guix substitute servers include the ERIS read capability in the Narinfo withouth making blocks available. This only requires a bit of CPU for computing the ERIS read capability. No additional disk space or bandwidth is required by the official substitute servers. Users can get the signed ERIS read capability from the official Guix susbtitute servers but can fetch blocks from anywhere while still being sure to get the right substitutes. This would allow community members to make blocks available independently and experiment with various transports while not changing the trust-model when fetching substitutes. ## TODOs - [ ] Better fiberization of `guix publish` and `guix/scripts/substitute.scm` - [ ] Debug issue where blocks of large substitutes are not properly stored (possibly related to hackey fiberization). - [ ] Add Guix tests - [ ] Add documentation. - [ ] Write a RFC along the proposed Request-For-Comment process (https://issues.guix.gnu.org/66844) - [ ] Allow encoding of blocks without running `guix publish` (maybe an `eris` format for `guix pack`). - [ ] Dependencies (guile-eris and guile-coap) contain some fixes that need to be properly released. - [ ] Implement CoAP peer connections and maybe IPFS transport in Kapla. - [ ] Release initial version of Kapla. - [ ] Update service definitions for `guix-publish`, `guix-daemon` with an option to enable decentralized substitute stuff and add service definition for `kapla`. ## Hic Sunt Dracones Everything is still quite fragile. The fiberization of `guix substitute` and `guix publish` is hackey. Kapla is still very limited and unreleased. But I hope to have been able to capture the current state of things and paint a picture of the plan. Thanks for making it so far and for your comments, questions and hackings. Greetings, pukkamustard pukkamustard (7): narinfo: Add ERIS field. gnu: Add guile-coap. gnu: guile-eris: Update to 1.2.0-dev. publish: Add ERIS URN to narinfo. eris: Connect with an ERIS Store over CoAP+Unix. substitute: Decode substitutes using ERIS. gnu: Add kapla. Makefile.am | 1 + configure.ac | 5 + gnu/packages/guile-xyz.scm | 144 ++++++++++++++++++++++------ gnu/packages/package-management.scm | 1 + guix/eris.scm | 137 ++++++++++++++++++++++++++ guix/narinfo.scm | 17 +++- guix/scripts/publish.scm | 58 ++++++++--- guix/scripts/substitute.scm | 76 +++++++++++---- nix/nix-daemon/guix-daemon.cc | 5 + 9 files changed, 380 insertions(+), 64 deletions(-) create mode 100644 guix/eris.scm base-commit: 4a1b3830a8ff6b05ad9a2b27c8a2cdbd00a45787 -- 2.41.0
Information forwarded
to guix-patches@gnu.org
:
bug#52555
; Package guix-patches
.
(Thu, 28 Dec 2023 09:41:05 GMT) (full text, mbox, link).
Message #199 received at 52555@debbugs.gnu.org (full text, mbox, reply):
* gnu/packages/guile-xyz.scm (kapla): New variable. --- gnu/packages/guile-xyz.scm | 46 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) diff --git a/gnu/packages/guile-xyz.scm b/gnu/packages/guile-xyz.scm index a66a6d8ad5..f3d97cca37 100644 --- a/gnu/packages/guile-xyz.scm +++ b/gnu/packages/guile-xyz.scm @@ -102,6 +102,7 @@ (define-module (gnu packages guile-xyz) #:use-module (gnu packages multiprecision) #:use-module (gnu packages ncurses) #:use-module (gnu packages networking) + #:use-module (gnu packages ninja) #:use-module (gnu packages noweb) #:use-module (gnu packages nss) #:use-module (gnu packages package-management) @@ -5193,6 +5194,51 @@ (define-public guile-eris (home-page "https://codeberg.org/eris/guile-eris") (license license:gpl3+)))) +(define-public kapla + (let ((commit "fa72bcb116ed6ea20f76206145766cb46fa4f30d") + (revision "0")) + (package + (name "kapla") + (version (git-version "0.1.0-dev" revision commit)) + (source + (origin + (method git-fetch) + (uri (git-reference + (url "https://codeberg.org/eris/kapla.git") + (commit commit))) + (file-name (git-file-name name version)) + (sha256 (base32 "15g9dg6i93n5wkkma983hvcl5mgvw13yxxrv8ka5n5mvslk9f0wa")))) + (build-system gnu-build-system) + (arguments + (list + #:phases + #~(modify-phases + %standard-phases + (delete 'patch-source-shebangs) + (replace 'configure + (lambda* (#:key outputs #:allow-other-keys) + (invoke "guile" + "--no-auto-compile" + "configure" + (string-append "--prefix=" #$output)))) + (replace 'build (lambda _ (invoke "ninja"))) + (delete 'check) + (delete 'install)))) + (native-inputs (list ninja)) + (inputs (list guile-3.0)) + (propagated-inputs + (list guile-coap + guile-sqlite3 + guile-eris + guile-lib + guile-fibers)) + (synopsis "Block storage and transport for ERIS encoded content") + (description "Kapla is a tool for encoding content with ERIS and +managing blocks of ERIS encoded content. It allows blocks to be stored in a +local database and be shared over the network.") + (home-page "https://codeberg.org/eris/kapla") + (license license:agpl3+)))) + (define-public guile-r6rs-protobuf (package (name "guile-r6rs-protobuf") -- 2.41.0
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