guix - Wojtek's customized Guix

diff options
Diffstat (limited to 'gnu/system')
0 files changed, 0 insertions, 0 deletions
'#n48'>48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2018 Danny Milosavljevic <dannym@scratchpost.org>
;;; Copyright © 2020 Jakub Kądziołka <kuba@kadziolka.net>
;;; Copyright © 2020, 2021 Maxim Cournoyer <maxim.cournoyer@gmail.com>
;;; Copyright © 2020 Efraim Flashner <efraim@flashner.co.il>
;;; Copyright © 2020 Jesse Dowell <jessedowell@gmail.com>
;;; Copyright © 2021 Brice Waegeneire <brice@waegenei.re>
;;; Copyright © 2023, 2024 Giacomo Leidi <goodoldpaul@autistici.org>
;;;
;;; 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 (gnu services docker)
  #:use-module (gnu image)
  #:use-module (gnu services)
  #:use-module (gnu services configuration)
  #:use-module (gnu services base)
  #:use-module (gnu services dbus)
  #:use-module (gnu services shepherd)
  #:use-module (gnu system)
  #:use-module (gnu system image)
  #:use-module (gnu system setuid)
  #:use-module (gnu system shadow)
  #:use-module (gnu packages admin)               ;shadow
  #:use-module (gnu packages docker)
  #:use-module (gnu packages linux)               ;singularity
  #:use-module (guix records)
  #:use-module (guix diagnostics)
  #:use-module (guix gexp)
  #:use-module (guix i18n)
  #:use-module (guix monads)
  #:use-module (guix packages)
  #:use-module (guix profiles)
  #:use-module ((guix scripts pack) #:prefix pack:)
  #:use-module (guix store)
  #:use-module (srfi srfi-1)
  #:use-module (ice-9 format)
  #:use-module (ice-9 match)

  #:export (containerd-configuration
            containerd-service-type
            docker-configuration
            docker-service-type
            singularity-service-type
            oci-image
            oci-image?
            oci-image-fields
            oci-image-repository
            oci-image-tag
            oci-image-value
            oci-image-pack-options
            oci-image-target
            oci-image-system
            oci-image-grafts?
            oci-container-configuration
            oci-container-configuration?
            oci-container-configuration-fields
            oci-container-configuration-user
            oci-container-configuration-group
            oci-container-configuration-command
            oci-container-configuration-entrypoint
            oci-container-configuration-host-environment
            oci-container-configuration-environment
            oci-container-configuration-image
            oci-container-configuration-provision
            oci-container-configuration-requirement
            oci-container-configuration-log-file
            oci-container-configuration-auto-start?
            oci-container-configuration-respawn?
            oci-container-configuration-shepherd-actions
            oci-container-configuration-network
            oci-container-configuration-ports
            oci-container-configuration-volumes
            oci-container-configuration-container-user
            oci-container-configuration-workdir
            oci-container-configuration-extra-arguments
            oci-container-service-type
            oci-container-shepherd-service
            %oci-container-accounts))

(define-maybe file-like)

(define-configuration docker-configuration
  (docker
   (file-like docker)
   "Docker daemon package.")
  (docker-cli
   (file-like docker-cli)
   "Docker client package.")
  (containerd
   (file-like containerd)
   "Deprecated.  Do not use.")
  (proxy
   (file-like docker-libnetwork-cmd-proxy)
   "The proxy package to support inter-container and outside-container
loop-back communications.")
  (enable-proxy?
   (boolean #t)
   "Enable or disable the user-land proxy (enabled by default).")
  (debug?
   (boolean #f)
   "Enable or disable debug output.")
  (enable-iptables?
   (boolean #t)
   "Enable addition of iptables rules (enabled by default).")
  (environment-variables
   (list '())
   "Environment variables to set for dockerd")
  (config-file
   (maybe-file-like)
   "JSON configuration file to pass to dockerd")
  (no-serialization))

(define-configuration containerd-configuration
  (containerd
   (file-like containerd)
   "containerd package.")
  (debug?
   (boolean #f)
   "Enable or disable debug output.")
  (environment-variables
   (list '())
   "Environment variables to set for containerd.")
  (no-serialization))

(define %docker-accounts
  (list (user-group (name "docker") (system? #t))))

(define (%containerd-activation config)
  (let ((state-dir "/var/lib/containerd"))
    #~(begin
        (use-modules (guix build utils))
        (mkdir-p #$state-dir))))

(define (%docker-activation config)
  (%containerd-activation config)
  (let ((state-dir "/var/lib/docker"))
    #~(begin
        (use-modules (guix build utils))
        (mkdir-p #$state-dir))))

(define (containerd-shepherd-service config)
  (match-record config <containerd-configuration>
                (containerd debug? environment-variables)
    (shepherd-service
     (documentation "containerd daemon.")
     (provision '(containerd))
     (start #~(make-forkexec-constructor
               (list (string-append #$containerd "/bin/containerd")
                     #$@(if debug?
                            '("--log-level=debug")
                            '()))
               ;; For finding containerd-shim binary.
               #:environment-variables
               (list #$@environment-variables
                     (string-append "PATH=" #$containerd "/bin"))
               #:pid-file "/run/containerd/containerd.pid"
               #:pid-file-timeout 300
               #:log-file "/var/log/containerd.log"))
     (stop #~(make-kill-destructor)))))

(define containerd-service-type
  (service-type (name 'containerd)
                (description "Run containerd container runtime.")
                (extensions
                 (list
                  ;; Make sure the 'ctr' command is available.
                  (service-extension profile-service-type
                                     (compose list containerd-configuration-containerd))
                  (service-extension shepherd-root-service-type
                                     (lambda (config)
                                       (list (containerd-shepherd-service config))))))
                (default-value (containerd-configuration))))

(define (docker-shepherd-service config)
  (let* ((docker (docker-configuration-docker config))
         (enable-proxy? (docker-configuration-enable-proxy? config))
         (enable-iptables? (docker-configuration-enable-iptables? config))
         (environment-variables (docker-configuration-environment-variables config))
         (proxy (docker-configuration-proxy config))
         (debug? (docker-configuration-debug? config))
         (config-file (docker-configuration-config-file config)))
    (shepherd-service
           (documentation "Docker daemon.")
           (provision '(dockerd))
           (requirement '(containerd
                          dbus-system
                          elogind
                          file-system-/sys/fs/cgroup
                          networking
                          udev))
           (start #~(make-forkexec-constructor
                     (list (string-append #$docker "/bin/dockerd")
                           "-p" "/var/run/docker.pid"
                           #$@(if (not (eq? config-file %unset-value))
                                  (list #~(string-append
                                           "--config-file=" #$config-file))
                                  '())
                           #$@(if debug?
                                  '("--debug" "--log-level=debug")
                                  '())
                           #$@(if enable-proxy?
                                  (list "--userland-proxy=true"
                                        #~(string-append
                                           "--userland-proxy-path=" #$proxy "/bin/proxy"))
                                  '("--userland-proxy=false"))
                           (if #$enable-iptables?
                               "--iptables"
                               "--iptables=false")
                           "--containerd" "/run/containerd/containerd.sock")
                     #:environment-variables
                     (list #$@environment-variables)
                     #:pid-file "/var/run/docker.pid"
                     #:log-file "/var/log/docker.log"))
           (stop #~(make-kill-destructor)))))

(define docker-service-type
  (service-type (name 'docker)
                (description "Provide capability to run Docker application
bundles in Docker containers.")
                (extensions
                 (list
                  ;; Make sure the 'docker' command is available.
                  (service-extension profile-service-type
                                     (compose list docker-configuration-docker-cli))
                  (service-extension activation-service-type
                                     %docker-activation)
                  (service-extension shepherd-root-service-type
                                     (lambda (config)
                                       (list (docker-shepherd-service config))))
                  (service-extension account-service-type
                                     (const %docker-accounts))))
                (default-value (docker-configuration))))


;;;
;;; Singularity.
;;;

(define %singularity-activation
  (with-imported-modules '((guix build utils))
    #~(begin
        (use-modules (guix build utils))

        (define %mount-directory
          "/var/singularity/mnt/")

        ;; Create the directories that Singularity 2.6 expects to find.  Make
        ;; them #o755 like the 'install-data-hook' rule in 'Makefile.am' of
        ;; Singularity 2.6.1.
        (for-each (lambda (directory)
                    (let ((directory (string-append %mount-directory
                                                    directory)))
                      (mkdir-p directory)
                      (chmod directory #o755)))
                  '("container" "final" "overlay" "session"))
        (chmod %mount-directory #o755))))

(define (singularity-setuid-programs singularity)
  "Return the setuid-root programs that SINGULARITY needs."
  (define helpers
    ;; The helpers, under a meaningful name.
    (computed-file "singularity-setuid-helpers"
                   #~(begin
                       (mkdir #$output)
                       (for-each (lambda (program)
                                   (symlink (string-append #$singularity
                                                           "/libexec/singularity"
                                                           "/bin/"
                                                           program "-suid")
                                            (string-append #$output
                                                           "/singularity-"
                                                           program
                                                           "-helper")))
                                 '("action" "mount" "start")))))

  (map file-like->setuid-program
       (list (file-append helpers "/singularity-action-helper")
             (file-append helpers "/singularity-mount-helper")
             (file-append helpers "/singularity-start-helper"))))

(define singularity-service-type
  (service-type (name 'singularity)
                (description
                 "Install the Singularity application bundle tool.")
                (extensions
                 (list (service-extension setuid-program-service-type
                                          singularity-setuid-programs)
                       (service-extension activation-service-type
                                          (const %singularity-activation))))
                (default-value singularity)))


;;;
;;; OCI container.
;;;

(define (oci-sanitize-pair pair delimiter)
  (define (valid? member)
    (or (string? member)
        (gexp? member)
        (file-like? member)))
  (match pair
    (((? valid? key) . (? valid? value))
     #~(string-append #$key #$delimiter #$value))
    (_
     (raise
      (formatted-message
       (G_ "pair members must contain only strings, gexps or file-like objects
but ~a was found")
       pair)))))

(define (oci-sanitize-mixed-list name value delimiter)
  (map
   (lambda (el)
     (cond ((string? el) el)
           ((pair? el) (oci-sanitize-pair el delimiter))
           (else
            (raise
             (formatted-message
              (G_ "~a members must be either a string or a pair but ~a was
found!")
              name el)))))
   value))

(define (oci-sanitize-host-environment value)
  ;; Expected spec format:
  ;; '(("HOME" . "/home/nobody") "JAVA_HOME=/java")
  (oci-sanitize-mixed-list "host-environment" value "="))

(define (oci-sanitize-environment value)
  ;; Expected spec format:
  ;; '(("HOME" . "/home/nobody") "JAVA_HOME=/java")
  (oci-sanitize-mixed-list "environment" value "="))

(define (oci-sanitize-ports value)
  ;; Expected spec format:
  ;; '(("8088" . "80") "2022:22")
  (oci-sanitize-mixed-list "ports" value ":"))

(define (oci-sanitize-volumes value)
  ;; Expected spec format:
  ;; '(("/mnt/dir" . "/dir") "/run/current-system/profile:/java")
  (oci-sanitize-mixed-list "volumes" value ":"))

(define (oci-sanitize-shepherd-actions value)
  (map
   (lambda (el)
     (if (shepherd-action? el)
         el
         (raise
          (formatted-message
           (G_ "shepherd-actions may only be shepherd-action records
but ~a was found") el))))
   value))

(define (oci-sanitize-extra-arguments value)
  (define (valid? member)
    (or (string? member)
        (gexp? member)
        (file-like? member)))
  (map
   (lambda (el)
     (if (valid? el)
         el
         (raise
          (formatted-message
           (G_ "extra arguments may only be strings, gexps or file-like objects
but ~a was found") el))))
   value))

(define (oci-image-reference image)
  (if (string? image)
      image
      (string-append (oci-image-repository image)
                     ":" (oci-image-tag image))))

(define (oci-lowerable-image? image)
  (or (manifest? image)
      (operating-system? image)
      (gexp? image)
      (file-like? image)))

(define (string-or-oci-image? image)
  (or (string? image)
      (oci-image? image)))

(define list-of-symbols?
  (list-of symbol?))

(define-maybe/no-serialization string)

(define-configuration/no-serialization oci-image
  (repository
   (string)
   "A string like @code{myregistry.local:5000/testing/test-image} that names
the OCI image.")
  (tag
   (string "latest")
   "A string representing the OCI image tag. Defaults to @code{latest}.")
  (value
   (oci-lowerable-image)
   "A @code{manifest} or @code{operating-system} record that will be lowered
into an OCI compatible tarball.  Otherwise this field's value can be a gexp
or a file-like object that evaluates to an OCI compatible tarball.")
  (pack-options
   (list '())
   "An optional set of keyword arguments that will be passed to the
@code{docker-image} procedure from @code{guix scripts pack}.  They can be used
to replicate @command{guix pack} behavior:

@lisp
(oci-image
  (repository \"guile\")
  (tag \"3\")
  (manifest (specifications->manifest '(\"guile\")))
  (pack-options
    '(#:symlinks ((\"/bin/guile\" -> \"bin/guile\"))
      #:max-layers 2)))
@end lisp

If the @code{value} field is an @code{operating-system} record, this field's
value will be ignored.")
  (system
   (maybe-string)
   "Attempt to build for a given system, e.g. \"i686-linux\"")
  (target
   (maybe-string)
   "Attempt to cross-build for a given triple, e.g. \"aarch64-linux-gnu\"")
  (grafts?
   (boolean #f)
   "Whether to allow grafting or not in the pack build."))

(define-configuration/no-serialization oci-container-configuration
  (user
   (string "oci-container")
   "The user under whose authority docker commands will be run.")
  (group
   (string "docker")
   "The group under whose authority docker commands will be run.")
  (command
   (list-of-strings '())
   "Overwrite the default command (@code{CMD}) of the image.")
  (entrypoint
   (maybe-string)
   "Overwrite the default entrypoint (@code{ENTRYPOINT}) of the image.")
  (host-environment
   (list '())
   "Set environment variables in the host environment where @command{docker run}
is invoked.  This is especially useful to pass secrets from the host to the
container without having them on the @command{docker run}'s command line: by
setting the @code{MYSQL_PASSWORD} on the host and by passing
@code{--env MYSQL_PASSWORD} through the @code{extra-arguments} field, it is
possible to securely set values in the container environment.  This field's
value can be a list of pairs or strings, even mixed:

@lisp
(list '(\"LANGUAGE\" . \"eo:ca:eu\")
      \"JAVA_HOME=/opt/java\")
@end lisp

Pair members can be strings, gexps or file-like objects. Strings are passed
directly to @code{make-forkexec-constructor}."
   (sanitizer oci-sanitize-host-environment))
  (environment
   (list '())
   "Set environment variables inside the container.  This can be a list of pairs
or strings, even mixed:

@lisp
(list '(\"LANGUAGE\" . \"eo:ca:eu\")
      \"JAVA_HOME=/opt/java\")
@end lisp

Pair members can be strings, gexps or file-like objects. Strings are passed
directly to the Docker CLI.  You can refer to the
@url{https://docs.docker.com/engine/reference/commandline/run/#env,upstream}
documentation for semantics."
   (sanitizer oci-sanitize-environment))
  (image
   (string-or-oci-image)
   "The image used to build the container.  It can be a string or an
@code{oci-image} record.  Strings are resolved by the Docker
Engine, and follow the usual format
@code{myregistry.local:5000/testing/test-image:tag}.")
  (provision
   (maybe-string)
   "Set the name of the provisioned Shepherd service.")
  (requirement
   (list-of-symbols '())
   "Set additional Shepherd services dependencies to the provisioned Shepherd
service.")
  (log-file
   (maybe-string)
   "When @code{log-file} is set, it names the file to which the service’s
standard output and standard error are redirected.  @code{log-file} is created
if it does not exist, otherwise it is appended to.")
  (auto-start?
   (boolean #t)
   "Whether this service should be started automatically by the Shepherd.  If it
is @code{#f} the service has to be started manually with @command{herd start}.")
  (respawn?
   (boolean #f)
   "Whether to restart the service when it stops, for instance when the
underlying process dies.")
  (shepherd-actions
   (list '())
   "This is a list of @code{shepherd-action} records defining actions supported
by the service."
   (sanitizer oci-sanitize-shepherd-actions))
  (network
   (maybe-string)
   "Set a Docker network for the spawned container.")
  (ports
   (list '())
   "Set the port or port ranges to expose from the spawned container.  This can
be a list of pairs or strings, even mixed:

@lisp
(list '(\"8080\" . \"80\")
      \"10443:443\")
@end lisp

Pair members can be strings, gexps or file-like objects. Strings are passed
directly to the Docker CLI.  You can refer to the
@url{https://docs.docker.com/engine/reference/commandline/run/#publish,upstream}
documentation for semantics."
   (sanitizer oci-sanitize-ports))
  (volumes
   (list '())
   "Set volume mappings for the spawned container.  This can be a
list of pairs or strings, even mixed:

@lisp
(list '(\"/root/data/grafana\" . \"/var/lib/grafana\")
      \"/gnu/store:/gnu/store\")
@end lisp

Pair members can be strings, gexps or file-like objects. Strings are passed
directly to the Docker CLI.  You can refer to the
@url{https://docs.docker.com/engine/reference/commandline/run/#volume,upstream}
documentation for semantics."
   (sanitizer oci-sanitize-volumes))
  (container-user
   (maybe-string)
   "Set the current user inside the spawned container.  You can refer to the
@url{https://docs.docker.com/engine/reference/run/#user,upstream}
documentation for semantics.")
  (workdir
   (maybe-string)
   "Set the current working for the spawned Shepherd service.
You can refer to the
@url{https://docs.docker.com/engine/reference/run/#workdir,upstream}
documentation for semantics.")
  (extra-arguments
   (list '())
   "A list of strings, gexps or file-like objects that will be directly passed
to the @command{docker run} invokation."
   (sanitizer oci-sanitize-extra-arguments)))

(define oci-container-configuration->options
  (lambda (config)
    (let ((entrypoint
           (oci-container-configuration-entrypoint config))
          (network
           (oci-container-configuration-network config))
          (user
           (oci-container-configuration-container-user config))
          (workdir
           (oci-container-configuration-workdir config)))
      (apply append
             (filter (compose not unspecified?)
                     `(,(if (maybe-value-set? entrypoint)
                            `("--entrypoint" ,entrypoint)
                            '())
                       ,(append-map
                         (lambda (spec)
                           (list "--env" spec))
                         (oci-container-configuration-environment config))
                       ,(if (maybe-value-set? network)
                            `("--network" ,network)
                            '())
                       ,(if (maybe-value-set? user)
                            `("--user" ,user)
                            '())
                       ,(if (maybe-value-set? workdir)
                            `("--workdir" ,workdir)
                            '())
                       ,(append-map
                         (lambda (spec)
                           (list "-p" spec))
                         (oci-container-configuration-ports config))
                       ,(append-map
                         (lambda (spec)
                           (list "-v" spec))
                         (oci-container-configuration-volumes config))))))))

(define* (get-keyword-value args keyword #:key (default #f))
  (let ((kv (memq keyword args)))
    (if (and kv (>= (length kv) 2))
        (cadr kv)
        default)))

(define (lower-operating-system os target system)
  (mlet* %store-monad
      ((tarball
        (lower-object
         (system-image (os->image os #:type docker-image-type))
         system
         #:target target)))
    (return tarball)))

(define (lower-manifest name image target system)
  (define value (oci-image-value image))
  (define options (oci-image-pack-options image))
  (define image-reference
    (oci-image-reference image))
  (define image-tag
    (let* ((extra-options
            (get-keyword-value options #:extra-options))
           (image-tag-option
            (and extra-options
                 (get-keyword-value extra-options #:image-tag))))
      (if image-tag-option
          '()
          `(#:extra-options (#:image-tag ,image-reference)))))

  (mlet* %store-monad
      ((_ (set-grafting
           (oci-image-grafts? image)))
       (guile (set-guile-for-build (default-guile)))
       (profile
        (profile-derivation value
                            #:target target
                            #:system system
                            #:hooks '()
                            #:locales? #f))
       (tarball (apply pack:docker-image
                       `(,name ,profile
                         ,@options
                         ,@image-tag
                         #:localstatedir? #t))))
    (return tarball)))

(define (lower-oci-image name image)
  (define value (oci-image-value image))
  (define image-target (oci-image-target image))
  (define image-system (oci-image-system image))
  (define target
    (if (maybe-value-set? image-target)
        image-target
        (%current-target-system)))
  (define system
    (if (maybe-value-set? image-system)
        image-system
        (%current-system)))
  (with-store store
   (run-with-store store
     (match value
       ((? manifest? value)
        (lower-manifest name image target system))
       ((? operating-system? value)
        (lower-operating-system value target system))
       ((or (? gexp? value)
            (? file-like? value))
        value)
       (_
        (raise
         (formatted-message
          (G_ "oci-image value must contain only manifest,
operating-system, gexp or file-like records but ~a was found")
          value))))
     #:target target
     #:system system)))

(define (%oci-image-loader name image tag)
  (let ((docker (file-append docker-cli "/bin/docker"))
        (tarball (lower-oci-image name image)))
    (with-imported-modules '((guix build utils))
      (program-file (format #f "~a-image-loader" name)
       #~(begin
           (use-modules (guix build utils)
                        (ice-9 popen)
                        (ice-9 rdelim))

           (format #t "Loading image for ~a from ~a...~%" #$name #$tarball)
           (define line
             (read-line
              (open-input-pipe
               (string-append #$docker " load -i " #$tarball))))

           (unless (or (eof-object? line)
                       (string-null? line))
             (format #t "~a~%" line)
             (let ((repository&tag
                    (string-drop line
                                 (string-length
                                   "Loaded image: "))))

               (invoke #$docker "tag" repository&tag #$tag)
               (format #t "Tagged ~a with ~a...~%" #$tarball #$tag))))))))

(define (oci-container-shepherd-service config)
  (define (guess-name name image)
    (if (maybe-value-set? name)
        name
        (string-append "docker-"
                       (basename
                        (if (string? image)
                            (first (string-split image #\:))
                            (oci-image-repository image))))))

  (let* ((docker (file-append docker-cli "/bin/docker"))
         (actions (oci-container-configuration-shepherd-actions config))
         (auto-start?
          (oci-container-configuration-auto-start? config))
         (user (oci-container-configuration-user config))
         (group (oci-container-configuration-group config))
         (host-environment
          (oci-container-configuration-host-environment config))
         (command (oci-container-configuration-command config))
         (log-file (oci-container-configuration-log-file config))
         (provision (oci-container-configuration-provision config))
         (requirement (oci-container-configuration-requirement config))
         (respawn?
          (oci-container-configuration-respawn? config))
         (image (oci-container-configuration-image config))
         (image-reference (oci-image-reference image))
         (options (oci-container-configuration->options config))
         (name (guess-name provision image))
         (extra-arguments
          (oci-container-configuration-extra-arguments config)))

    (shepherd-service (provision `(,(string->symbol name)))
                      (requirement `(dockerd user-processes ,@requirement))
                      (respawn? respawn?)
                      (auto-start? auto-start?)
                      (documentation
                       (string-append
                        "Docker backed Shepherd service for "
                        (if (oci-image? image) name image) "."))
                      (start
                       #~(lambda ()
                           #$@(if (oci-image? image)
                                  #~((invoke #$(%oci-image-loader
                                                name image image-reference)))
                                  #~())
                           (fork+exec-command
                            ;; docker run [OPTIONS] IMAGE [COMMAND] [ARG...]
                            (list #$docker "run" "--rm" "--name" #$name
                                  #$@options #$@extra-arguments
                                  #$image-reference #$@command)
                            #:user #$user
                            #:group #$group
                            #$@(if (maybe-value-set? log-file)
                                   (list #:log-file log-file)
                                   '())
                            #:environment-variables
                            (list #$@host-environment))))
                      (stop
                       #~(lambda _
                           (invoke #$docker "rm" "-f" #$name)))
                      (actions
                       (if (oci-image? image)
                           '()
                           (append
                            (list
                             (shepherd-action
                              (name 'pull)
                              (documentation
                               (format #f "Pull ~a's image (~a)."
                                       name image))
                              (procedure
                               #~(lambda _
                                   (invoke #$docker "pull" #$image)))))
                            actions))))))

(define %oci-container-accounts
  (list (user-account
         (name "oci-container")
         (comment "OCI services account")
         (group "docker")
         (system? #t)
         (home-directory "/var/empty")
         (shell (file-append shadow "/sbin/nologin")))))

(define (configs->shepherd-services configs)
  (map oci-container-shepherd-service configs))

(define oci-container-service-type
  (service-type (name 'oci-container)
                (extensions (list (service-extension profile-service-type
                                                     (lambda _ (list docker-cli)))
                                  (service-extension account-service-type
                                                     (const %oci-container-accounts))
                                  (service-extension shepherd-root-service-type
                                                     configs->shepherd-services)))
                (default-value '())
                (extend append)
                (compose concatenate)
                (description
                 "This service allows the management of OCI
containers as Shepherd services.")))

context:
space:
mode: