182 lines
7.3 KiB
Scheme
182 lines
7.3 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2018 Danny Milosavljevic <dannym@scratchpost.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 services docker)
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#:use-module (gnu services)
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#:use-module (gnu services configuration)
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#:use-module (gnu services base)
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#:use-module (gnu services dbus)
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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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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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(define (serialize-boolean field-name val)
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"")
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(define-configuration docker-configuration
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(docker
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(package docker)
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"Docker daemon package.")
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(containerd
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(package containerd)
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"containerd package.")
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(proxy
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(package docker-libnetwork-cmd-proxy)
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"The proxy package to support inter-container and outside-container
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loop-back communications.")
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(enable-proxy?
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(boolean #t)
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"Enable or disable the user-land proxy (enabled by default)."))
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(define %docker-accounts
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(list (user-group (name "docker") (system? #t))))
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(define (%containerd-activation config)
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(let ((state-dir "/var/lib/containerd"))
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#~(begin
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(use-modules (guix build utils))
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(mkdir-p #$state-dir))))
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(define (%docker-activation config)
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(%containerd-activation config)
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(let ((state-dir "/var/lib/docker"))
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#~(begin
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(use-modules (guix build utils))
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(mkdir-p #$state-dir))))
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(define (containerd-shepherd-service config)
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(let* ((package (docker-configuration-containerd config)))
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(shepherd-service
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(documentation "containerd daemon.")
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(provision '(containerd))
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(start #~(make-forkexec-constructor
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(list (string-append #$package "/bin/containerd"))
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#:log-file "/var/log/containerd.log"))
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(stop #~(make-kill-destructor)))))
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(define (docker-shepherd-service config)
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(let* ((docker (docker-configuration-docker config))
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(enable-proxy? (docker-configuration-enable-proxy? config))
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(proxy (docker-configuration-proxy config)))
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(shepherd-service
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(documentation "Docker daemon.")
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(provision '(dockerd))
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(requirement '(containerd
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dbus-system
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elogind
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file-system-/sys/fs/cgroup/blkio
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file-system-/sys/fs/cgroup/cpu
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file-system-/sys/fs/cgroup/cpuset
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file-system-/sys/fs/cgroup/devices
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file-system-/sys/fs/cgroup/memory
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; TODO: file-system-/sys/fs/cgroup/pids
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networking
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udev))
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(start #~(make-forkexec-constructor
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(list (string-append #$docker "/bin/dockerd")
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"-p" "/var/run/docker.pid"
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(if #$enable-proxy? "--userland-proxy" "")
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"--userland-proxy-path" (string-append #$proxy
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"/bin/proxy"))
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#:pid-file "/var/run/docker.pid"
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#:log-file "/var/log/docker.log"))
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(stop #~(make-kill-destructor)))))
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(define docker-service-type
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(service-type (name 'docker)
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(description "Provide capability to run Docker application
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bundles in Docker containers.")
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(extensions
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(list
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(service-extension activation-service-type
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%docker-activation)
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(service-extension shepherd-root-service-type
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(lambda (config)
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(list (containerd-shepherd-service config)
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(docker-shepherd-service config))))
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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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