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