summaryrefslogtreecommitdiff
path: root/gnu/services/ganeti.scm
blob: 85adbd7362ed479a12b828258fddd34f7640a3ad (about) (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
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
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2020 Marius Bakke <marius@gnu.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 ganeti)
  #:use-module (gnu packages virtualization)
  #:use-module (gnu services)
  #:use-module (gnu services mcron)
  #:use-module (gnu services shepherd)
  #:use-module (guix gexp)
  #:use-module (guix records)

  #:use-module (srfi srfi-1)
  #:use-module (ice-9 match)

  #:export (ganeti-noded-configuration
            ganeti-noded-configuration?
            ganeti-noded-configuration-ganeti
            ganeti-noded-configuration-port
            ganeti-noded-configuration-address
            ganeti-noded-configuration-interface
            ganeti-noded-configuration-max-clients
            ganeti-noded-configuration-ssl?
            ganeti-noded-configuration-ssl-key
            ganeti-noded-configuration-ssl-cert
            ganeti-noded-configuration-debug?
            ganeti-noded-service-type

            ganeti-confd-configuration
            ganeti-confd-configuration?
            ganeti-confd-configuration-ganeti
            ganeti-confd-configuration-port
            ganeti-confd-configuration-address
            ganeti-confd-configuration-debug
            ganeti-confd-service-type

            ganeti-wconfd-configuration
            ganeti-wconfd-configuration?
            ganeti-wconfd-configuration-ganeti
            ganeti-wconfd-configuration-no-voting?
            ganeti-wconfd-configuration-debug?
            ganeti-wconfd-service-type

            ganeti-luxid-configuration
            ganeti-luxid-configuration?
            ganeti-luxid-configuration-ganeti
            ganeti-luxid-configuration-no-voting?
            ganeti-luxid-configuration-debug?
            ganeti-luxid-service-type

            ganeti-rapi-configuration
            ganeti-rapi-configuration?
            ganeti-rapi-configuration-ganeti
            ganeti-rapi-configuration-require-authentication?
            ganeti-rapi-configuration-port
            ganeti-rapi-configuration-address
            ganeti-rapi-configuration-interface
            ganeti-rapi-configuration-max-clients
            ganeti-rapi-configuration-ssl?
            ganeti-rapi-configuration-ssl-key
            ganeti-rapi-configuration-ssl-cert
            ganeti-rapi-configuration-debug?
            ganeti-rapi-service-type

            ganeti-kvmd-configuration
            ganeti-kvmd-configuration?
            ganeti-kvmd-configuration-ganeti
            ganeti-kvmd-configuration-debug?
            ganeti-kvmd-service-type

            ganeti-mond-configuration
            ganeti-mond-configuration?
            ganeti-mond-configuration-ganeti
            ganeti-mond-configuration-port
            ganeti-mond-configuration-address
            ganeti-mond-configuration-debug?
            ganeti-mond-service-type

            ganeti-metad-configuration
            ganeti-metad-configuration?
            ganeti-metad-configuration-ganeti
            ganeti-metad-configuration-port
            ganeti-metad-configuration-address
            ganeti-metad-configuration-debug?
            ganeti-metad-service-type

            ganeti-watcher-configuration
            ganeti-watcher-configuration?
            ganeti-watcher-configuration-ganeti
            ganeti-watcher-configuration-schedule
            ganeti-watcher-configuration-rapi-ip
            ganeti-watcher-configuration-job-age
            ganeti-watcher-configuration-verify-disks?
            ganeti-watcher-configuration-debug?
            ganeti-watcher-service-type

            ganeti-cleaner-configuration
            ganeti-cleaner-configuration?
            ganeti-cleaner-configuration-ganeti
            ganeti-cleaner-configuration-master-schedule
            ganeti-cleaner-configuration-node-schedule
            ganeti-cleaner-service-type

            ganeti-os
            ganeti-os?
            ganeti-os-name
            ganeti-os-extension
            ganeti-os-variants

            ganeti-os-variant
            ganeti-os-variant?
            ganeti-os-variant-name
            ganeti-os-variant-configuration

            %debootstrap-interfaces-hook
            %debootstrap-grub-hook
            %default-debootstrap-hooks
            %default-debootstrap-extra-pkgs
            debootstrap-configuration
            debootstrap-configuration?
            debootstrap-configuration-hooks
            debootstrap-configuration-proxy
            debootstrap-configuration-mirror
            debootstrap-configuration-arch
            debootstrap-configuration-suite
            debootstrap-configuration-extra-pkgs
            debootstrap-configuration-components
            debootstrap-configuration-generate-cache?
            debootstrap-configuration-clean-cache
            debootstrap-configuration-partition-style
            debootstrap-configuration-partition-alignment

            debootstrap-variant
            debootstrap-os
            %default-debootstrap-variants

            guix-variant
            guix-os
            %default-guix-variants

            %default-ganeti-os

            ganeti-configuration
            ganeti-configuration?
            ganeti-configuration-noded-configuration
            ganeti-configuration-confd-configuration
            ganeti-configuration-wconfd-configuration
            ganeti-configuration-luxid-configuration
            ganeti-configuration-rapi-configuration
            ganeti-configuration-kvmd-configuration
            ganeti-configuration-mond-configuration
            ganeti-configuration-metad-configuration
            ganeti-configuration-watcher-configuration
            ganeti-configuration-cleaner-configuration
            ganeti-configuration-file-storage-paths
            ganeti-configuration-os
            ganeti-service-type))

;;;
;;; Service definitions for running a Ganeti cluster.
;;;
;;; Planned improvements: run daemons (except ganeti-noded) under unprivileged
;;; user accounts and/or containers.  The account names must match the ones
;;; given to Ganetis configure script.  metad needs "setcap" or root in order
;;; to bind on port 80.

;; Set PATH so the various daemons are able to find the 'ip' executable, LVM,
;; Ceph, Gluster, etc, without having to add absolute references to everything.
(define %default-ganeti-environment-variables
  (list (string-append "PATH="
                       (string-join '("/run/setuid-programs"
                                      "/run/current-system/profile/sbin"
                                      "/run/current-system/profile/bin")
                                    ":"))))

(define-record-type* <ganeti-noded-configuration>
  ganeti-noded-configuration make-ganeti-noded-configuration
  ganeti-noded-configuration?
  (ganeti      ganeti-noded-configuration-ganeti        ;file-like
               (default ganeti))
  (port        ganeti-noded-configuration-port          ;integer
               (default 1811))
  (address     ganeti-noded-configuration-address       ;string
               (default "0.0.0.0"))
  (interface   ganeti-noded-configuration-interface     ;string | #f
               (default #f))
  (max-clients ganeti-noded-configuration-max-clients   ;integer
               (default 20))
  (ssl?        ganeti-noded-configuration-ssl?          ;Boolean
               (default #t))
  (ssl-key     ganeti-noded-configuration-ssl-key       ;string
               (default "/var/lib/ganeti/server.pem"))
  (ssl-cert    ganeti-noded-configuration-ssl-cert      ;string
               (default "/var/lib/ganeti/server.pem"))
  (debug?      ganeti-noded-configuration-debug?        ;Boolean
               (default #f)))

(define ganeti-noded-service
  (match-lambda
    (($ <ganeti-noded-configuration> ganeti port address interface max-clients
                                     ssl? ssl-key ssl-cert debug?)
     (list (shepherd-service
            (documentation "Run the Ganeti node daemon.")
            (provision '(ganeti-noded))
            (requirement '(user-processes networking))

            ;; If the daemon stops, it is probably for a good reason;
            ;; otherwise ganeti-watcher will restart it for us anyway.
            (respawn? #f)

            (start #~(make-forkexec-constructor
                      (list #$(file-append ganeti "/sbin/ganeti-noded")
                            #$(string-append "--port=" (number->string port))
                            #$(string-append "--bind=" address)
                            #$@(if interface
                                   #~((string-append "--interface=" #$interface))
                                   #~())
                            #$(string-append "--max-clients="
                                             (number->string max-clients))
                            #$@(if ssl?
                                   #~((string-append "--ssl-key=" #$ssl-key)
                                      (string-append "--ssl-cert=" #$ssl-cert))
                                   #~("--no-ssl"))
                            #$@(if debug?
                                   #~("--debug")
                                   #~()))
                      #:environment-variables
                      '#$%default-ganeti-environment-variables
                      #:pid-file "/var/run/ganeti/ganeti-noded.pid"))
            (stop #~(make-kill-destructor)))))))

(define ganeti-noded-service-type
  (service-type (name 'ganeti-noded)
                (extensions
                 (list (service-extension shepherd-root-service-type
                                          ganeti-noded-service)))
                (default-value (ganeti-noded-configuration))
                (description
                 "@command{ganeti-noded} is the daemon which is responsible
for the node functions in the Ganeti system.")))

(define-record-type* <ganeti-confd-configuration>
  ganeti-confd-configuration make-ganeti-confd-configuration
  ganeti-confd-configuration?
  (ganeti      ganeti-confd-configuration-ganeti        ;file-like
               (default ganeti))
  (port        ganeti-confd-configuration-port          ;integer
               (default 1814))
  (address     ganeti-confd-configuration-address       ;string
               (default "0.0.0.0"))
  (debug?      ganeti-confd-configuration-debug?        ;Boolean
               (default #f)))

(define ganeti-confd-service
  (match-lambda
    (($ <ganeti-confd-configuration> ganeti port address debug?)
     (list (shepherd-service
            (documentation "Run the Ganeti confd daemon.")
            (provision '(ganeti-confd))
            (requirement '(user-processes networking))
            (respawn? #f)
            (start #~(make-forkexec-constructor
                      (list #$(file-append ganeti "/sbin/ganeti-confd")
                            #$(string-append "--port=" (number->string port))
                            #$(string-append "--bind=" address)
                            #$@(if debug?
                                   #~("--debug")
                                   #~()))
                      #:environment-variables
                      '#$%default-ganeti-environment-variables
                      #:pid-file "/var/run/ganeti/ganeti-confd.pid"))
            (stop #~(make-kill-destructor)))))))

(define ganeti-confd-service-type
  (service-type (name 'ganeti-confd)
                (extensions
                 (list (service-extension shepherd-root-service-type
                                          ganeti-confd-service)))
                (default-value (ganeti-confd-configuration))
                (description
                 "@command{ganeti-confd} is a daemon used to answer queries
related to the configuration of a Ganeti cluster.")))

(define-record-type* <ganeti-wconfd-configuration>
  ganeti-wconfd-configuration make-ganeti-wconfd-configuration
  ganeti-wconfd-configuration?
  (ganeti      ganeti-wconfd-configuration-ganeti       ;file-like
               (default ganeti))
  (no-voting?  ganeti-wconfd-configuration-no-voting?   ;Boolean
               (default #f))
  (debug?      ganeti-wconfd-configuration-debug?       ;Boolean
               (default #f)))

;; If this file exists, the wconfd daemon will be forcefully started even on
;; non-master nodes.  It is used to accommodate a master-failover scenario.
(define %wconfd-force-node-hint
  "/var/lib/ganeti/guix_wconfd_force_node_hint")

(define (wconfd-wrapper ganeti args)
  ;; Wrapper for the wconfd daemon that looks for the force-node hint.
  (program-file
   "wconfd-wrapper"
   #~(begin
       (let ((wconfd #$(file-append ganeti "/sbin/ganeti-wconfd"))
             (force-node? (file-exists? #$%wconfd-force-node-hint)))
         (if force-node?
             (execl wconfd wconfd "--force-node" "--no-voting" "--yes-do-it" #$@args)
             (execl wconfd wconfd #$@args))))))

(define shepherd-wconfd-force-start-action
  ;; Shepherd action to create the force-node hint and start wconfd.
  (shepherd-action
   (name 'force-start)
   (documentation
    "Forcefully start wconfd even on non-master nodes (dangerous!).")
   (procedure #~(lambda _
                  (format #t "Forcefully starting the wconfd daemon...~%")
                  (action 'ganeti-wconfd 'enable)
                  (dynamic-wind
                    (lambda ()
                      (false-if-exception
                       (call-with-output-file #$%wconfd-force-node-hint
                         (lambda (port)
                           (const #t)))))
                    (lambda ()
                      (action 'ganeti-wconfd 'restart))
                    (lambda ()
                      (delete-file #$%wconfd-force-node-hint)))
                    #t))))

(define ganeti-wconfd-service
  (match-lambda
    (($ <ganeti-wconfd-configuration> ganeti no-voting? debug?)
     (list (shepherd-service
            (documentation "Run the Ganeti wconfd daemon.")
            (provision '(ganeti-wconfd))
            (requirement '(user-processes))

            ;; Shepherd action to support a master-failover scenario.  It is
            ;; automatically invoked during 'gnt-cluster master-failover' (see
            ;; related Ganeti patch) and not intended for interactive use.
            (actions (list shepherd-wconfd-force-start-action))

            ;; wconfd will disable itself when not running on the master
            ;; node.  Don't attempt to restart it.
            (respawn? #f)

            (start
             #~(make-forkexec-constructor
                (list #$(wconfd-wrapper ganeti
                                        (append
                                         (if no-voting?
                                             '("--no-voting" "--yes-do-it")
                                             '())
                                         (if debug?
                                             '("--debug")
                                             '()))))
                #:environment-variables
                '#$%default-ganeti-environment-variables
                #:pid-file "/var/run/ganeti/ganeti-wconfd.pid"))
            (stop #~(make-kill-destructor)))))))

(define ganeti-wconfd-service-type
  (service-type (name 'ganeti-wconfd)
                (extensions
                 (list (service-extension shepherd-root-service-type
                                          ganeti-wconfd-service)))
                (default-value (ganeti-wconfd-configuration))
                (description
                 "@command{ganeti-wconfd} is the daemon that has authoritative
knowledge about the configuration and is the only entity that can accept changes
to it.  All jobs that need to modify the configuration will do so by sending
appropriate requests to this daemon.")))

(define-record-type* <ganeti-luxid-configuration>
  ganeti-luxid-configuration make-ganeti-luxid-configuration
  ganeti-luxid-configuration?
  (ganeti      ganeti-luxid-configuration-ganeti        ;file-like
               (default ganeti))
  (no-voting?  ganeti-luxid-configuration-no-voting?    ;Boolean
               (default #f))
  (debug?      ganeti-luxid-configuration-debug?        ;Boolean
               (default #f)))

(define ganeti-luxid-service
  (match-lambda
    (($ <ganeti-luxid-configuration> ganeti no-voting? debug?)
     (list (shepherd-service
            (documentation "Run the Ganeti LUXI daemon.")
            (provision '(ganeti-luxid))
            (requirement '(user-processes))

            ;; This service will automatically disable itself when not
            ;; running on the master node.  Don't attempt to restart it.
            (respawn? #f)

            (start #~(make-forkexec-constructor
                      (list #$(file-append ganeti "/sbin/ganeti-luxid")
                            #$@(if no-voting?
                                   #~("--no-voting" "--yes-do-it")
                                   #~())
                            #$@(if debug?
                                   #~("--debug")
                                   #~()))
                      #:environment-variables
                      '#$%default-ganeti-environment-variables
                      #:pid-file "/var/run/ganeti/ganeti-luxid.pid"))
            (stop #~(make-kill-destructor)))))))

(define ganeti-luxid-service-type
  (service-type (name 'ganeti-luxid)
                (extensions
                 (list (service-extension shepherd-root-service-type
                                          ganeti-luxid-service)))
                (default-value (ganeti-luxid-configuration))
                (description
                 "@command{ganeti-luxid} is a daemon used to answer queries
related to the configuration and the current live state of a Ganeti cluster.
Additionally, it is the authoritative daemon for the Ganeti job queue.  Jobs can
be submitted via this daemon and it schedules and starts them.")))

(define-record-type* <ganeti-rapi-configuration>
  ganeti-rapi-configuration make-ganeti-rapi-configuration
  ganeti-rapi-configuration?
  (ganeti      ganeti-rapi-configuration-ganeti         ;file-like
               (default ganeti))
  (require-authentication?
   ganeti-rapi-configuration-require-authentication?    ;Boolean
   (default #f))
  (port        ganeti-rapi-configuration-port           ;integer
               (default 5080))
  (address     ganeti-rapi-configuration-address        ;string
               (default "0.0.0.0"))
  (interface   ganeti-rapi-configuration-interface      ;string | #f
               (default #f))
  (max-clients ganeti-rapi-configuration-max-clients    ;integer
               (default 20))
  (ssl?        ganeti-rapi-configuration-ssl?           ;Boolean
               (default #t))
  (ssl-key     ganeti-rapi-configuration-ssl-key        ;string
               (default "/var/lib/ganeti/server.pem"))
  (ssl-cert    ganeti-rapi-configuration-ssl-cert       ;string
               (default "/var/lib/ganeti/server.pem"))
  (debug?      ganeti-rapi-configuration-debug?         ;Boolean
               (default #f)))

(define ganeti-rapi-service
  (match-lambda
    (($ <ganeti-rapi-configuration> ganeti require-authentication? port address
                                    interface max-clients ssl? ssl-key ssl-cert
                                    debug?)
     (list (shepherd-service
            (documentation "Run the Ganeti RAPI daemon.")
            (provision '(ganeti-rapi))
            (requirement '(user-processes networking))

            ;; This service will automatically disable itself when not
            ;; running on the master node.  Don't attempt to restart it.
            (respawn? #f)

            (start #~(make-forkexec-constructor
                      (list #$(file-append ganeti "/sbin/ganeti-rapi")
                            #$@(if require-authentication?
                                   #~("--require-authentication")
                                   #~())
                            #$(string-append "--port=" (number->string port))
                            #$(string-append "--bind=" address)
                            #$@(if interface
                                   #~((string-append "--interface=" #$interface))
                                   #~())
                            #$(string-append "--max-clients="
                                             (number->string max-clients))
                            #$@(if ssl?
                                   #~((string-append "--ssl-key=" #$ssl-key)
                                      (string-append "--ssl-cert=" #$ssl-cert))
                                   #~("--no-ssl"))
                            #$@(if debug?
                                   #~("--debug")
                                   #~()))
                      #:environment-variables
                      '#$%default-ganeti-environment-variables
                      #:pid-file "/var/run/ganeti/ganeti-rapi.pid"))
            (stop #~(make-kill-destructor)))))))

(define ganeti-rapi-service-type
  (service-type (name 'ganeti-rapi)
                (extensions
                 (list (service-extension shepherd-root-service-type
                                          ganeti-rapi-service)))
                (default-value (ganeti-rapi-configuration))
                (description
                 "@command{ganeti-rapi} is the daemon providing a remote API
for Ganeti clusters.")))

(define-record-type* <ganeti-kvmd-configuration>
  ganeti-kvmd-configuration make-ganeti-kvmd-configuration
  ganeti-kvmd-configuration?
  (ganeti      ganeti-kvmd-configuration-ganeti         ;file-like
               (default ganeti))
  (debug?      ganeti-kvmd-configuration-debug?         ;Boolean
               (default #f)))

(define ganeti-kvmd-service
  (match-lambda
    (($ <ganeti-kvmd-configuration> ganeti debug?)
     (list (shepherd-service
            (documentation "Run the Ganeti KVM daemon.")
            (provision '(ganeti-kvmd))
            (requirement '(user-processes))

            ;; This service will automatically disable itself when not
            ;; needed.  Don't attempt to restart it.
            (respawn? #f)

            (start #~(make-forkexec-constructor
                      (list #$(file-append ganeti "/sbin/ganeti-kvmd")
                            #$@(if debug?
                                   #~("--debug")
                                   #~()))
                      #:environment-variables
                      '#$%default-ganeti-environment-variables
                      #:pid-file "/var/run/ganeti/ganeti-kvmd.pid"))
            (stop #~(make-kill-destructor)))))))

(define ganeti-kvmd-service-type
  (service-type (name 'ganeti-kvmd)
                (extensions
                 (list (service-extension shepherd-root-service-type
                                          ganeti-kvmd-service)))
                (default-value (ganeti-kvmd-configuration))
                (description
                 "@command{ganeti-kvmd} is responsible for determining whether
a given KVM instance was shutdown by an administrator or a user.

The KVM daemon monitors, using @code{inotify}, KVM instances through their QMP
sockets, which are provided by KVM.  Using the QMP sockets, the KVM daemon
listens for particular shutdown, powerdown, and stop events which will determine
if a given instance was shutdown by the user or Ganeti, and this result is
communicated to Ganeti via a special file in the file system.")))

(define-record-type* <ganeti-mond-configuration>
  ganeti-mond-configuration make-ganeti-mond-configuration
  ganeti-mond-configuration?
  (ganeti      ganeti-mond-configuration-ganeti         ;file-like
               (default ganeti))
  (port        ganeti-mond-configuration-port           ;integer
               (default 1815))
  (address     ganeti-mond-configuration-address        ;string
               (default "0.0.0.0"))
  (debug?      ganeti-mond-configuration-debug?         ;Boolean
               (default #f)))

(define ganeti-mond-service
  (match-lambda
    (($ <ganeti-mond-configuration> ganeti port address debug?)
     (list (shepherd-service
            (documentation "Run the Ganeti monitoring daemon.")
            (provision '(ganeti-mond))
            (requirement '(user-processes networking))
            (respawn? #f)
            (start #~(make-forkexec-constructor
                      (list #$(file-append ganeti "/sbin/ganeti-mond")
                            #$(string-append "--port=" (number->string port))
                            #$(string-append "--bind=" address)
                            #$@(if debug?
                                   #~("--debug")
                                   #~()))
                      #:pid-file "/var/run/ganeti/ganeti-mond.pid"))
            (stop #~(make-kill-destructor)))))))

(define ganeti-mond-service-type
  (service-type (name 'ganeti-mond)
                (extensions
                 (list (service-extension shepherd-root-service-type
                                          ganeti-mond-service)))
                (default-value (ganeti-mond-configuration))
                (description
                 "@command{ganeti-mond} is a daemon providing monitoring
functionality.  It is responsible for running the data collectors and to
provide the collected information through a HTTP interface.")))

(define-record-type* <ganeti-metad-configuration>
  ganeti-metad-configuration make-ganeti-metad-configuration
  ganeti-metad-configuration?
  (ganeti      ganeti-metad-configuration-ganeti        ;file-like
               (default ganeti))
  (port        ganeti-metad-configuration-port          ;integer
               (default 80))
  (address     ganeti-metad-configuration-address       ;string | #f
               (default #f))
  (debug?      ganeti-metad-configuration-debug?        ;Boolean
               (default #f)))

(define ganeti-metad-service
  (match-lambda
    (($ <ganeti-metad-configuration> ganeti port address debug?)
     (list (shepherd-service
            (documentation "Run the Ganeti metadata daemon.")
            (provision '(ganeti-metad))
            (requirement '(user-processes networking))

            ;; This service is started on demand.
            (auto-start? #f)
            (respawn? #f)

            (start #~(make-forkexec-constructor
                      (list #$(file-append ganeti "/sbin/ganeti-metad")
                            #$(string-append "--port=" (number->string port))
                            #$@(if address
                                   #~((string-append "--bind=" #$address))
                                   #~())
                            #$@(if debug?
                                   #~("--debug")
                                   #~()))
                      #:pid-file "/var/run/ganeti/ganeti-metad.pid"))
            (stop #~(make-kill-destructor)))))))

(define ganeti-metad-service-type
  (service-type (name 'ganeti-metad)
                (extensions
                 (list (service-extension shepherd-root-service-type
                                          ganeti-metad-service)))
                (default-value (ganeti-metad-configuration))
                (description
                 "@command{ganeti-metad} is a daemon that can be used to pass
information to OS install scripts or instances.")))

(define-record-type* <ganeti-watcher-configuration>
  ganeti-watcher-configuration make-ganeti-watcher-configuration
  ganeti-watcher-configuration?
  (ganeti        ganeti-watcher-configuration-ganeti        ;file-like
                 (default ganeti))
  (schedule      ganeti-watcher-configuration-schedule      ;list | string
                 (default '(next-second-from
                            ;; Run every five minutes.
                            (next-minute (range 0 60 5)))))
  (rapi-ip       ganeti-watcher-configuration-rapi-ip       ;#f | string
                 (default #f))
  (job-age       ganeti-watcher-configuration-job-age       ;integer
                 (default (* 6 3600)))
  (verify-disks? ganeti-watcher-configuration-verify-disks? ;Boolean
                 (default #t))
  (debug?        ganeti-watcher-configuration-debug?        ;Boolean
                 (default #f)))

(define ganeti-watcher-command
  (match-lambda
    (($ <ganeti-watcher-configuration> ganeti _ rapi-ip job-age verify-disks?
                                       debug?)
     #~(lambda ()
         (system* #$(file-append ganeti "/sbin/ganeti-watcher")
                  #$@(if rapi-ip
                         #~((string-append "--rapi-ip=" #$rapi-ip))
                         #~())
                  #$(string-append "--job-age=" (number->string job-age))
                  #$@(if verify-disks?
                         #~()
                         #~("--no-verify-disks"))
                  #$@(if debug?
                         #~("--debug")
                         #~()))))))

(define (ganeti-watcher-jobs config)
  (match config
    (($ <ganeti-watcher-configuration> _ schedule)
     (list
      #~(job #$@(match schedule
                  ((? string?)
                   #~(#$schedule))
                  ((? list?)
                   #~('#$schedule)))
             #$(ganeti-watcher-command config))))))

(define ganeti-watcher-service-type
  (service-type (name 'ganeti-watcher)
                (extensions
                 (list (service-extension mcron-service-type
                                          ganeti-watcher-jobs)))
                (default-value (ganeti-watcher-configuration))
                (description
                 "@command{ganeti-watcher} is a periodically run script that
performs a number of maintenance actions on the cluster.  It will automatically
restart instances that are marked as ERROR_down, i.e., instances that should be
running, but are not; and it will also try to repair DRBD links in case a
secondary node has rebooted.  In addition it is responsible for archiving old
cluster jobs, and it will restart any down Ganeti daemons that are appropriate
for the current node.  If the cluster parameter @code{maintain_node_health} is
enabled, the watcher will also shutdown instances and DRBD devices if the node
is declared offline by known master candidates.")))

(define-record-type* <ganeti-cleaner-configuration>
  ganeti-cleaner-configuration make-ganeti-cleaner-configuration
  ganeti-cleaner-configuration?
  (ganeti          ganeti-cleaner-configuration-ganeti          ;file-like
                   (default ganeti))
  (master-schedule ganeti-cleaner-configuration-master-schedule ;list | string
                   ;; Run the master cleaner at 01:45 every day.
                   (default "45 1 * * *"))
  (node-schedule ganeti-cleaner-configuration-node-schedule     ;list | string
                   ;; Run the node cleaner at 02:45 every day.
                   (default "45 2 * * *")))

(define ganeti-cleaner-jobs
  (match-lambda
    (($ <ganeti-cleaner-configuration> ganeti master-schedule node-schedule)
     (list
      #~(job #$@(match master-schedule
                  ((? string?)
                   #~(#$master-schedule))
                  ((? list?)
                   #~('#$master-schedule)))
             (lambda ()
              (system* #$(file-append ganeti "/sbin/ganeti-cleaner")
                       "master")))
      #~(job #$@(match node-schedule
                  ((? string?)
                   #~(#$node-schedule))
                  ((? list?)
                   #~('#$node-schedule)))
             (lambda ()
               (system* #$(file-append ganeti "/sbin/ganeti-cleaner")
                        "node")))))))

(define ganeti-cleaner-service-type
  (service-type (name 'ganeti-cleaner)
                (extensions
                 (list (service-extension mcron-service-type
                                          ganeti-cleaner-jobs)))
                (default-value (ganeti-cleaner-configuration))
                (description
                 "@command{ganeti-cleaner} is a script that removes old files
from the cluster.  When called with @code{node} as argument it removes expired
X509 certificates and keys from @file{/var/run/ganeti/crypto}, as well as
outdated @command{ganeti-watcher} information.

When called with @code{master} as argument, it instead removes files older
than 21 days from @file{/var/lib/ganeti/queue/archive}.")))

(define-record-type* <ganeti-configuration>
  ganeti-configuration make-ganeti-configuration
  ganeti-configuration?
  (ganeti                 ganeti-configuration-ganeti
                          (default ganeti))
  (noded-configuration    ganeti-configuration-noded-configuration
                          (default (ganeti-noded-configuration)))
  (confd-configuration    ganeti-configuration-confd-configuration
                          (default (ganeti-confd-configuration)))
  (wconfd-configuration   ganeti-configuration-wconfd-configuration
                          (default (ganeti-wconfd-configuration)))
  (luxid-configuration    ganeti-configuration-luxid-configuration
                          (default (ganeti-luxid-configuration)))
  (rapi-configuration     ganeti-configuration-rapi-configuration
                          (default (ganeti-rapi-configuration)))
  (kvmd-configuration     ganeti-configuration-kvmd-configuration
                          (default (ganeti-kvmd-configuration)))
  (mond-configuration     ganeti-configuration-mond-configuration
                          (default (ganeti-mond-configuration)))
  (metad-configuration    ganeti-configuration-metad-configuration
                          (default (ganeti-metad-configuration)))
  (watcher-configuration  ganeti-configuration-watcher-configuration
                          (default (ganeti-watcher-configuration)))
  (cleaner-configuration  ganeti-configuration-cleaner-configuration
                          (default (ganeti-cleaner-configuration)))
  (file-storage-paths     ganeti-configuration-file-storage-paths ;list of strings | gexp
                          (default '()))
  (os                     ganeti-configuration-os  ;list of <ganeti-os>
                          (default '())))

(define (ganeti-activation config)
  (with-imported-modules '((guix build utils))
    #~(begin
        (use-modules (guix build utils))
        (for-each mkdir-p
                  '("/var/log/ganeti"
                    "/var/log/ganeti/kvm"
                    "/var/log/ganeti/os"
                    "/var/lib/ganeti/rapi"
                    "/var/lib/ganeti/queue"
                    "/var/lib/ganeti/queue/archive"
                    "/var/run/ganeti/bdev-cache"
                    "/var/run/ganeti/crypto"
                    "/var/run/ganeti/socket"
                    "/var/run/ganeti/instance-disks"
                    "/var/run/ganeti/instance-reason"
                    "/var/run/ganeti/livelocks")))))

(define ganeti-shepherd-services
  (match-lambda
    (($ <ganeti-configuration> _ noded confd wconfd luxid rapi kvmd mond metad)
     (append (ganeti-noded-service noded)
             (ganeti-confd-service confd)
             (ganeti-wconfd-service wconfd)
             (ganeti-luxid-service luxid)
             (ganeti-rapi-service rapi)
             (ganeti-kvmd-service kvmd)
             (ganeti-mond-service mond)
             (ganeti-metad-service metad)))))

(define ganeti-mcron-jobs
  (match-lambda
    (($ <ganeti-configuration> _ _ _ _ _ _ _ _ _ watcher cleaner)
     (append (ganeti-watcher-jobs watcher)
             (ganeti-cleaner-jobs cleaner)))))

(define-record-type* <ganeti-os>
  ganeti-os make-ganeti-os ganeti-os?
  (name ganeti-os-name)                     ;string
  (extension ganeti-os-extension)           ;string
  (variants ganeti-os-variants              ;list of <ganeti-os-variant>
            (default '())))

(define-record-type* <ganeti-os-variant>
  ganeti-os-variant make-ganeti-os-variant ganeti-os-variant?
  (name ganeti-os-variant-name)                       ;string
  (configuration ganeti-os-variant-configuration))    ;<file-like>

(define %debootstrap-interfaces-hook
  (file-append ganeti-instance-debootstrap
               "/share/doc/ganeti-instance-debootstrap/examples/interfaces"))

;; The GRUB hook shipped with instance-debootstrap does not work with GRUB2.
;; For convenience, provide one that work with modern Debians here.
;; Note: it would be neat to reuse Guix' bootloader infrastructure instead.
(define %debootstrap-grub-hook
  (plain-file "grub"
              "#!/usr/bin/env bash
CLEANUP=( )
cleanup() {
  if [ ${#CLEANUP[*]} -gt 0 ]; then
    LAST_ELEMENT=$((${#CLEANUP[*]}-1))
    REVERSE_INDEXES=$(seq ${LAST_ELEMENT} -1 0)
    for i in $REVERSE_INDEXES; do
      ${CLEANUP[$i]}
    done
  fi
}

trap cleanup EXIT

mount -t proc proc $TARGET/proc
CLEANUP+=(\"umount $TARGET/proc\")
mount -t sysfs sysfs $TARGET/sys
CLEANUP+=(\"umount $TARGET/sys\")
mount -o bind /dev $TARGET/dev
CLEANUP+=(\"umount $TARGET/dev\")

echo '
GRUB_TIMEOUT_STYLE=menu
GRUB_CMDLINE_LINUX_DEFAULT=\"console=ttyS0,115200 net.ifnames=0\"
GRUB_TERMINAL=\"serial\"
GRUB_SERIAL_COMMAND=\"serial --unit=0 --speed=115200\"
' >> $TARGET/etc/default/grub

# This PATH is propagated into the chroot and necessary to make grub-install
# and related commands visible.
export PATH=\"/usr/sbin:/usr/bin:/sbin:/bin:$PATH\"

chroot \"$TARGET\" grub-install $BLOCKDEV
chroot \"$TARGET\" update-grub

cleanup
trap - EXIT
"))

(define %default-debootstrap-hooks
  `((10-interfaces . ,%debootstrap-interfaces-hook)
    (90-grub . ,%debootstrap-grub-hook)))

(define %default-debootstrap-extra-pkgs
  ;; Packages suitable for a fully virtualized KVM guest.
  '("acpi-support-base" "udev" "linux-image-amd64" "openssh-server"
    "locales-all" "grub-pc"))

(define-record-type* <debootstrap-configuration>
  debootstrap-configuration make-debootstrap-configuration
  debootstrap-configuration?
  (hooks debootstrap-configuration-hooks                     ;#f | gexp | '((name . gexp))
         (default %default-debootstrap-hooks))
  (proxy debootstrap-configuration-proxy (default #f))       ;#f | string
  (mirror debootstrap-configuration-mirror                   ;#f | string
          (default #f))
  (arch debootstrap-configuration-arch (default #f))         ;#f | string
  (suite debootstrap-configuration-suite                     ;#f | string
         (default "stable"))
  (extra-pkgs debootstrap-configuration-extra-pkgs           ;list of strings
              (default %default-debootstrap-extra-pkgs))
  (components debootstrap-configuration-components           ;list of strings
              (default '()))
  (generate-cache? debootstrap-configuration-generate-cache? ;Boolean
                   (default #t))
  (clean-cache debootstrap-configuration-clean-cache         ;#f | integer
               (default 14))
  (partition-style debootstrap-configuration-partition-style ;#f | symbol | string
                   (default 'msdos))
  (partition-alignment debootstrap-configuration-partition-alignment ;#f | integer
                       (default 2048)))

(define (hooks->directory hooks)
  (match hooks
    ((? file-like?)
     hooks)
    ((? list?)
     (let ((names (map car hooks))
           (files (map cdr hooks)))
       (with-imported-modules '((guix build utils))
         (computed-file "hooks-union"
                        #~(begin
                            (use-modules (guix build utils)
                                         (ice-9 match))
                            (mkdir-p #$output)
                            (with-directory-excursion #$output
                              (for-each (match-lambda
                                          ((name hook)
                                           (let ((file-name (string-append
                                                             #$output "/"
                                                             (symbol->string name))))
                                             ;; Copy to the destination to ensure
                                             ;; the file is executable.
                                             (copy-file hook file-name)
                                             (chmod file-name #o555))))
                                        '#$(zip names files))))))))
    (_ #f)))

(define-gexp-compiler (debootstrap-configuration-compiler
                       (file <debootstrap-configuration>) system target)
  (match file
    (($ <debootstrap-configuration> hooks proxy mirror arch suite extra-pkgs
                                    components generate-cache? clean-cache
                                    partition-style partition-alignment)
     (let ((customize-dir (hooks->directory hooks)))
       (gexp->derivation
        "debootstrap-variant"
        #~(call-with-output-file (ungexp output "out")
            (lambda (port)
              (display
               (string-append
                (ungexp-splicing
                 `(,@(if proxy
                          `("PROXY=" ,proxy "\n")
                          '())
                    ,@(if mirror
                          `("MIRROR=" ,mirror "\n")
                          '())
                    ,@(if arch
                          `("ARCH=" ,arch "\n")
                          '())
                    ,@(if suite
                          `("SUITE=" ,suite "\n")
                          '())
                    ,@(if (not (null? extra-pkgs))
                          `("EXTRA_PKGS=" ,(string-join extra-pkgs ",") "\n")
                          '())
                    ,@(if (not (null? components))
                          `("COMPONENTS=" ,(string-join components ",") "\n")
                          '())
                    ,@(if customize-dir
                          `("CUSTOMIZE_DIR=" ,customize-dir "\n")
                          '())
                    ,@(if generate-cache?
                          '("GENERATE_CACHE=yes\n")
                          '("GENERATE_CACHE=no\n"))
                    ,@(if clean-cache
                          `("CLEAN_CACHE=" ,(number->string clean-cache) "\n")
                          '())
                    ,@(if partition-style
                          (if (symbol? partition-style)
                              `("PARTITION_STYLE="
                                ,(symbol->string partition-style) "\n")
                              `("PARTITION_STYLE=" ,partition-style "\n"))
                          '())
                    ,@(if partition-alignment
                          `("PARTITION_ALIGNMENT="
                            ,(number->string partition-alignment) "\n")
                          '()))))
               port)))
        #:local-build? #t)))))

(define (ganeti-os->directory os)
  "Return the derivation to build the configuration directory to be installed
in /etc/ganeti/instance-$os for OS."
  (let* ((name      (ganeti-os-name os))
         (extension (ganeti-os-extension os))
         (variants  (ganeti-os-variants os))
         (names     (map ganeti-os-variant-name variants))
         (configs   (map ganeti-os-variant-configuration variants)))
    (with-imported-modules '((guix build utils))
      (define builder
        #~(begin
            (use-modules (guix build utils)
                         (ice-9 format)
                         (ice-9 match)
                         (srfi srfi-1))
            (mkdir-p #$output)
            (unless (null? '#$names)
              (let ((variants-dir (string-append #$output "/variants")))
                (mkdir-p variants-dir)
                (call-with-output-file (string-append variants-dir "/variants.list")
                  (lambda (port)
                    (format port "~a~%"
                            (string-join '#$names "\n"))))
                (for-each (match-lambda
                            ((name file)
                             (symlink file
                                      (string-append variants-dir "/" name
                                                     #$extension))))

                          '#$(zip names configs))))))

      (computed-file (string-append name "-os") builder))))

(define (ganeti-directory file-storage-file os)
  (let ((dirs (map ganeti-os->directory os))
        (names (map ganeti-os-name os)))
    (define builder
      #~(begin
          (use-modules (ice-9 match))
          (mkdir #$output)
          (when #$file-storage-file
            (symlink #$file-storage-file
                     (string-append #$output "/file-storage-paths")))
          (for-each (match-lambda
                      ((name dest)
                       (symlink dest
                                (string-append #$output "/instance-" name))))
                    '#$(zip names dirs))))
    (computed-file "etc-ganeti" builder)))

(define (file-storage-file paths)
  (match paths
    ((? null?) #f)
    ((? list?) (plain-file
                "file-storage-paths"
                (string-join paths "\n")))
    (_ paths)))

(define (ganeti-etc-service config)
  (list `("ganeti" ,(ganeti-directory
                     (file-storage-file
                      (ganeti-configuration-file-storage-paths config))
                     (ganeti-configuration-os config)))))

(define (debootstrap-os variants)
  (ganeti-os
   (name "debootstrap")
   (extension ".conf")
   (variants variants)))

(define (debootstrap-variant name configuration)
  (ganeti-os-variant
   (name name)
   (configuration configuration)))

(define %default-debootstrap-variants
  (list (debootstrap-variant
         "default"
         (debootstrap-configuration))))

(define (guix-os variants)
  (ganeti-os
   (name "guix")
   (extension ".scm")
   (variants variants)))

(define (guix-variant name configuration)
  (ganeti-os-variant
   (name name)
   (configuration configuration)))

(define %default-guix-variants
  (list (guix-variant
         "default"
         (file-append ganeti-instance-guix
                      "/share/doc/ganeti-instance-guix/examples/dynamic.scm"))))

;; The OS configurations usually come with a default OS.  To make them work
;; out of the box, follow suit.
(define %default-ganeti-os
  (list (debootstrap-os %default-debootstrap-variants)
        (guix-os %default-guix-variants)))

(define ganeti-service-type
  (service-type (name 'ganeti)
                (extensions
                 (list (service-extension activation-service-type
                                          ganeti-activation)
                       (service-extension shepherd-root-service-type
                                          ganeti-shepherd-services)
                       (service-extension etc-service-type
                                          ganeti-etc-service)
                       (service-extension profile-service-type
                                          (compose list ganeti-configuration-ganeti))
                       (service-extension mcron-service-type
                                          ganeti-mcron-jobs)))
                (default-value (ganeti-configuration (os %default-ganeti-os)))
                (description
                 "Ganeti is a family of services that are designed to run
on a fleet of machines and facilitate deployment and maintenance of virtual
servers (@dfn{instances}).  It can migrate instances between nodes, automatically
restart failed instances, evacuate nodes, and much more.")))