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  1.  
  2. { config, lib, pkgs, ... }:
  4. with lib;
  6. let
  7. sheepdog = pkgs.sheepdog;
  8. cfg = config.services.sheepdog;
  9. stateDir = "/var/lib/sheepdog";
  10. pidFile = "${stateDir}/run/sheep.pid";
  11. in
  12. {
  13. ###### interface
  15. options = {
  16. services.sheepdog = {
  17. enable = mkEnableOption "Sheepdog Daemon";
  19. config = mkOption {
  20. type = types.lines;
  21. default = "--cluster local --log dst=syslog --upgrade";
  22. description = ''
  23. Configuration directives that should be added to
  24. <literal>sheep commandline</literal>.
  25. '';
  26. };
  28. pidFile = mkOption {
  29. type = types.string;
  30. default = "${pidFile}";
  31. description = ''
  32. Where to write the pidfile
  33. '';
  34. };
  36. stateDir = mkOption {
  37. type = types.string;
  38. default = "${stateDir}";
  39. description = ''
  40. Where to store the cluster metadata and objects
  41. '';
  42. };
  43. };
  44. };
  46. ###### implementation
  48. config = mkIf config.services.sheepdog.enable {
  49. users.extraUsers = singleton {
  50. name = "sheepdog";
  51. uid = config.ids.uids.sheepdog;
  52. description = "Sheepdog daemon user";
  53. };
  55. users.extraGroups = singleton {
  56. name = "sheepdog";
  57. gid = config.ids.gids.sheepdog;
  58. };
  60. systemd.services.sheepdog = {
  61. description = "Sheepdog daemon";
  62. after = [ "network.target" "systemd-resolved.service" ];
  63. wants = [ "syslog.target" ];
  64. wantedBy = [ "multi-user.target" ];
  65. path = [ sheepdog ];
  66. preStart = ''
  67. if [ ! -d ${cfg.stateDir} ]; then
  68. mkdir -m 755 -p ${cfg.stateDir}
  69. chown -R sheepdog:sheepdog ${cfg.stateDir}
  70. fi
  72. pidFileDir=$(dirname ${cfg.pidFile})
  73. if [ ! -d ''${pidFileDir} ]; then
  74. mkdir -m 755 -p ''${pidFileDir}
  75. chown -R sheepdog:sheepdog ''${pidFileDir}
  76. fi
  77. '';
  79. serviceConfig = {
  80. Type = "forking";
  81. ExecStart = "${sheepdog}/bin/sheep --pidfile ${cfg.pidFile} ${cfg.config} ${cfg.stateDir}";
  82. PIDFile = "${stateDir}/run/sheep.pid";
  83. PermissionsStartOnly = true;
  84. User = "sheepdog";
  85. Group = "sheepdog";
  86. };
  87. };
  88. };
  89. }
  90.  
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