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1 | ;;; GNU Guix --- Functional package management for GNU |
2 | ;;; Copyright © 2018 Danny Milosavljevic <dannym@scratchpost.org> | |
2ef4d273 | 3 | ;;; Copyright © 2020 Jakub Kądziołka <kuba@kadziolka.net> |
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4 | ;;; |
5 | ;;; This file is part of GNU Guix. | |
6 | ;;; | |
7 | ;;; GNU Guix is free software; you can redistribute it and/or modify it | |
8 | ;;; under the terms of the GNU General Public License as published by | |
9 | ;;; the Free Software Foundation; either version 3 of the License, or (at | |
10 | ;;; your option) any later version. | |
11 | ;;; | |
12 | ;;; GNU Guix is distributed in the hope that it will be useful, but | |
13 | ;;; WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | ;;; GNU General Public License for more details. | |
16 | ;;; | |
17 | ;;; You should have received a copy of the GNU General Public License | |
18 | ;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>. | |
19 | ||
20 | (define-module (gnu services docker) | |
21 | #:use-module (gnu services) | |
22 | #:use-module (gnu services configuration) | |
23 | #:use-module (gnu services base) | |
24 | #:use-module (gnu services dbus) | |
25 | #:use-module (gnu services shepherd) | |
26 | #:use-module (gnu system shadow) | |
27 | #:use-module (gnu packages docker) | |
08814aec | 28 | #:use-module (gnu packages linux) ;singularity |
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29 | #:use-module (guix records) |
30 | #:use-module (guix gexp) | |
31 | #:use-module (guix packages) | |
32 | ||
33 | #:export (docker-configuration | |
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34 | docker-service-type |
35 | singularity-service-type)) | |
8af4c335 | 36 | |
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37 | ;;; We're not using serialize-configuration, but we must define this because |
38 | ;;; the define-configuration macro validates it exists. | |
39 | (define (serialize-boolean field-name val) | |
40 | "") | |
41 | ||
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42 | (define-configuration docker-configuration |
43 | (docker | |
44 | (package docker) | |
45 | "Docker daemon package.") | |
46 | (containerd | |
47 | (package containerd) | |
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48 | "containerd package.") |
49 | (proxy | |
50 | (package docker-libnetwork-cmd-proxy) | |
51 | "The proxy package to support inter-container and outside-container | |
52 | loop-back communications.") | |
53 | (enable-proxy? | |
54 | (boolean #t) | |
55 | "Enable or disable the user-land proxy (enabled by default).")) | |
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56 | |
57 | (define %docker-accounts | |
58 | (list (user-group (name "docker") (system? #t)))) | |
59 | ||
60 | (define (%containerd-activation config) | |
61 | (let ((state-dir "/var/lib/containerd")) | |
62 | #~(begin | |
63 | (use-modules (guix build utils)) | |
64 | (mkdir-p #$state-dir)))) | |
65 | ||
66 | (define (%docker-activation config) | |
67 | (%containerd-activation config) | |
68 | (let ((state-dir "/var/lib/docker")) | |
69 | #~(begin | |
70 | (use-modules (guix build utils)) | |
71 | (mkdir-p #$state-dir)))) | |
72 | ||
73 | (define (containerd-shepherd-service config) | |
74 | (let* ((package (docker-configuration-containerd config))) | |
75 | (shepherd-service | |
76 | (documentation "containerd daemon.") | |
77 | (provision '(containerd)) | |
78 | (start #~(make-forkexec-constructor | |
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79 | (list (string-append #$package "/bin/containerd")) |
80 | #:log-file "/var/log/containerd.log")) | |
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81 | (stop #~(make-kill-destructor))))) |
82 | ||
83 | (define (docker-shepherd-service config) | |
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84 | (let* ((docker (docker-configuration-docker config)) |
85 | (enable-proxy? (docker-configuration-enable-proxy? config)) | |
86 | (proxy (docker-configuration-proxy config))) | |
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87 | (shepherd-service |
88 | (documentation "Docker daemon.") | |
89 | (provision '(dockerd)) | |
8b0c1744 | 90 | (requirement '(containerd |
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91 | dbus-system |
92 | elogind | |
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93 | file-system-/sys/fs/cgroup/blkio |
94 | file-system-/sys/fs/cgroup/cpu | |
95 | file-system-/sys/fs/cgroup/cpuset | |
96 | file-system-/sys/fs/cgroup/devices | |
97 | file-system-/sys/fs/cgroup/memory | |
2ef4d273 | 98 | file-system-/sys/fs/cgroup/pids |
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99 | networking |
100 | udev)) | |
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101 | (start #~(make-forkexec-constructor |
102 | (list (string-append #$docker "/bin/dockerd") | |
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103 | "-p" "/var/run/docker.pid" |
104 | (if #$enable-proxy? "--userland-proxy" "") | |
105 | "--userland-proxy-path" (string-append #$proxy | |
106 | "/bin/proxy")) | |
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107 | #:pid-file "/var/run/docker.pid" |
108 | #:log-file "/var/log/docker.log")) | |
109 | (stop #~(make-kill-destructor))))) | |
110 | ||
111 | (define docker-service-type | |
112 | (service-type (name 'docker) | |
113 | (description "Provide capability to run Docker application | |
114 | bundles in Docker containers.") | |
115 | (extensions | |
116 | (list | |
117 | (service-extension activation-service-type | |
118 | %docker-activation) | |
119 | (service-extension shepherd-root-service-type | |
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120 | (lambda (config) |
121 | (list (containerd-shepherd-service config) | |
122 | (docker-shepherd-service config)))) | |
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123 | (service-extension account-service-type |
124 | (const %docker-accounts)))) | |
125 | (default-value (docker-configuration)))) | |
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126 | |
127 | \f | |
128 | ;;; | |
129 | ;;; Singularity. | |
130 | ;;; | |
131 | ||
132 | (define %singularity-activation | |
133 | (with-imported-modules '((guix build utils)) | |
134 | #~(begin | |
135 | (use-modules (guix build utils)) | |
136 | ||
137 | (define %mount-directory | |
138 | "/var/singularity/mnt/") | |
139 | ||
140 | ;; Create the directories that Singularity 2.6 expects to find. Make | |
141 | ;; them #o755 like the 'install-data-hook' rule in 'Makefile.am' of | |
142 | ;; Singularity 2.6.1. | |
143 | (for-each (lambda (directory) | |
144 | (let ((directory (string-append %mount-directory | |
145 | directory))) | |
146 | (mkdir-p directory) | |
147 | (chmod directory #o755))) | |
148 | '("container" "final" "overlay" "session")) | |
149 | (chmod %mount-directory #o755)))) | |
150 | ||
151 | (define (singularity-setuid-programs singularity) | |
152 | "Return the setuid-root programs that SINGULARITY needs." | |
153 | (define helpers | |
154 | ;; The helpers, under a meaningful name. | |
155 | (computed-file "singularity-setuid-helpers" | |
156 | #~(begin | |
157 | (mkdir #$output) | |
158 | (for-each (lambda (program) | |
159 | (symlink (string-append #$singularity | |
160 | "/libexec/singularity" | |
161 | "/bin/" | |
162 | program "-suid") | |
163 | (string-append #$output | |
164 | "/singularity-" | |
165 | program | |
166 | "-helper"))) | |
167 | '("action" "mount" "start"))))) | |
168 | ||
169 | (list (file-append helpers "/singularity-action-helper") | |
170 | (file-append helpers "/singularity-mount-helper") | |
171 | (file-append helpers "/singularity-start-helper"))) | |
172 | ||
173 | (define singularity-service-type | |
174 | (service-type (name 'singularity) | |
175 | (description | |
176 | "Install the Singularity application bundle tool.") | |
177 | (extensions | |
178 | (list (service-extension setuid-program-service-type | |
179 | singularity-setuid-programs) | |
180 | (service-extension activation-service-type | |
181 | (const %singularity-activation)))) | |
182 | (default-value singularity))) |