services: Add Singularity.
* gnu/packages/linux.scm (singularity)[source](snippet): Change file name of setuid helpers in libexec/cli/*.exec. [arguments]: Remove "--disable-suid". * gnu/services/docker.scm (%singularity-activation): New variable. (singularity-setuid-programs): New procedure. (singularity-service-type): New variable. * gnu/tests/singularity.scm: New file. * gnu/local.mk (GNU_SYSTEM_MODULES): Add it. * doc/guix.texi (Miscellaneous Services): Document it.
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Ludovic Courtès
Ludovic Courtès
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@ -24090,7 +24090,7 @@ The following is an example @code{dicod-service} configuration.
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@cindex Docker
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@subsubheading Docker Service
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The @code{(gnu services docker)} module provides the following service.
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The @code{(gnu services docker)} module provides the following services.
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@defvr {Scheme Variable} docker-service-type
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@ -24163,6 +24163,17 @@ The audit package to use.
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@end table
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@end deftp
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@defvr {Scheme Variable} singularity-service-type
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This is the type of the service that allows you to run
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@url{https://www.sylabs.io/singularity/, Singularity}, a Docker-style tool to
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create and run application bundles (aka. ``containers''). The value for this
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service is the Singularity package to use.
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The service does not install a daemon; instead, it installs helper programs as
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setuid-root (@pxref{Setuid Programs}) such that unprivileged users can invoke
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@command{singularity run} and similar commands.
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@end defvr
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@node Setuid Programs
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@section Setuid Programs
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@ -587,6 +587,7 @@ GNU_SYSTEM_MODULES = \
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%D%/tests/networking.scm \
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%D%/tests/rsync.scm \
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%D%/tests/security-token.scm \
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%D%/tests/singularity.scm \
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%D%/tests/ssh.scm \
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%D%/tests/version-control.scm \
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%D%/tests/virtualization.scm \
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@ -2899,12 +2899,16 @@ thanks to the use of namespaces.")
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(substitute* "bin/singularity.in"
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(("^PATH=.*" all)
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(string-append "#" all "\n")))
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(substitute* (find-files "libexec/cli" "\\.exec$")
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(("\\$SINGULARITY_libexecdir/singularity/bin/([a-z]+)-suid"
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_ program)
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(string-append "/run/setuid-programs/singularity-"
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program "-helper")))
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#t))))
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(build-system gnu-build-system)
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(arguments
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`(#:configure-flags
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(list "--disable-suid"
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"--localstatedir=/var")
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`(#:configure-flags '("--localstatedir=/var")
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#:phases
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(modify-phases %standard-phases
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(add-after 'unpack 'patch-reference-to-squashfs-tools
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@ -24,12 +24,14 @@
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#:use-module (gnu services shepherd)
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#:use-module (gnu system shadow)
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#:use-module (gnu packages docker)
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#:use-module (gnu packages linux) ;singularity
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#:use-module (guix records)
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#:use-module (guix gexp)
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#:use-module (guix packages)
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#:export (docker-configuration
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docker-service-type))
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docker-service-type
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singularity-service-type))
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;;; We're not using serialize-configuration, but we must define this because
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;;; the define-configuration macro validates it exists.
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@ -120,3 +122,60 @@ bundles in Docker containers.")
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(service-extension account-service-type
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(const %docker-accounts))))
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(default-value (docker-configuration))))
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;;;
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;;; Singularity.
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;;;
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(define %singularity-activation
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(with-imported-modules '((guix build utils))
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#~(begin
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(use-modules (guix build utils))
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(define %mount-directory
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"/var/singularity/mnt/")
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;; Create the directories that Singularity 2.6 expects to find. Make
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;; them #o755 like the 'install-data-hook' rule in 'Makefile.am' of
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;; Singularity 2.6.1.
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(for-each (lambda (directory)
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(let ((directory (string-append %mount-directory
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directory)))
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(mkdir-p directory)
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(chmod directory #o755)))
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'("container" "final" "overlay" "session"))
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(chmod %mount-directory #o755))))
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(define (singularity-setuid-programs singularity)
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"Return the setuid-root programs that SINGULARITY needs."
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(define helpers
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;; The helpers, under a meaningful name.
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(computed-file "singularity-setuid-helpers"
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#~(begin
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(mkdir #$output)
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(for-each (lambda (program)
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(symlink (string-append #$singularity
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"/libexec/singularity"
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"/bin/"
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program "-suid")
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(string-append #$output
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"/singularity-"
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program
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"-helper")))
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'("action" "mount" "start")))))
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(list (file-append helpers "/singularity-action-helper")
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(file-append helpers "/singularity-mount-helper")
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(file-append helpers "/singularity-start-helper")))
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(define singularity-service-type
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(service-type (name 'singularity)
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(description
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"Install the Singularity application bundle tool.")
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(extensions
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(list (service-extension setuid-program-service-type
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singularity-setuid-programs)
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(service-extension activation-service-type
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(const %singularity-activation))))
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(default-value singularity)))
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@ -0,0 +1,128 @@
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;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2019 Ludovic Courtès <ludo@gnu.org>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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;;; GNU Guix is free software; you can redistribute it and/or modify it
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;;; under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 3 of the License, or (at
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;;; your option) any later version.
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;;;
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;;; GNU Guix is distributed in the hope that it will be useful, but
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
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(define-module (gnu tests singularity)
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#:use-module (gnu tests)
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#:use-module (gnu system)
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#:use-module (gnu system vm)
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#:use-module (gnu system shadow)
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#:use-module (gnu services)
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#:use-module (gnu services docker)
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#:use-module (gnu packages bash)
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#:use-module (gnu packages guile)
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#:use-module (gnu packages linux) ;singularity
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#:use-module (guix gexp)
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#:use-module (guix store)
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#:use-module (guix grafts)
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#:use-module (guix monads)
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#:use-module (guix packages)
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#:use-module (guix profiles)
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#:use-module (guix scripts pack)
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#:export (%test-singularity))
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(define %singularity-os
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(simple-operating-system
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(service singularity-service-type)
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(simple-service 'guest-account
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account-service-type
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(list (user-account (name "guest") (uid 1000) (group "guest"))
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(user-group (name "guest") (id 1000))))))
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(define (run-singularity-test image)
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"Load IMAGE, a Squashfs image, as a Singularity image and run it inside
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%SINGULARITY-OS."
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(define os
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(marionette-operating-system %singularity-os))
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(define singularity-exec
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#~(begin
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(use-modules (ice-9 popen) (rnrs io ports))
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(let* ((pipe (open-pipe* OPEN_READ
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#$(file-append singularity
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"/bin/singularity")
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"exec" #$image "/bin/guile"
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"-c" "(display \"hello, world\")"))
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(str (get-string-all pipe))
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(status (close-pipe pipe)))
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(and (zero? status)
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(string=? str "hello, world")))))
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(define test
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(with-imported-modules '((gnu build marionette))
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#~(begin
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(use-modules (srfi srfi-11) (srfi srfi-64)
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(gnu build marionette))
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(define marionette
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(make-marionette (list #$(virtual-machine os))))
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(mkdir #$output)
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(chdir #$output)
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(test-begin "singularity")
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(test-assert "singularity exec /bin/guile (as root)"
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(marionette-eval '#$singularity-exec
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marionette))
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(test-equal "singularity exec /bin/guile (unprivileged)"
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0
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(marionette-eval
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`(begin
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(use-modules (ice-9 match))
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(match (primitive-fork)
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(0
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(dynamic-wind
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(const #f)
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(lambda ()
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(setgid 1000)
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(setuid 1000)
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(execl #$(program-file "singularity-exec-test"
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#~(exit #$singularity-exec))
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"test"))
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(lambda ()
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(primitive-exit 127))))
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(pid
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(cdr (waitpid pid)))))
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marionette))
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(test-end)
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(exit (= (test-runner-fail-count (test-runner-current)) 0)))))
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(gexp->derivation "singularity-test" test))
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(define (build-tarball&run-singularity-test)
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(mlet* %store-monad
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((_ (set-grafting #f))
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(guile (set-guile-for-build (default-guile)))
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;; 'singularity exec' insists on having /bin/sh in the image.
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(profile (profile-derivation (packages->manifest
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(list bash-minimal guile-2.2))
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#:hooks '()
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#:locales? #f))
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(tarball (squashfs-image "singularity-pack" profile
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#:symlinks '(("/bin" -> "bin")))))
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(run-singularity-test tarball)))
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(define %test-singularity
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(system-test
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(name "singularity")
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(description "Test Singularity container of Guix.")
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(value (build-tarball&run-singularity-test))))
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