nixos: add chronos service

1 files changed, 54 insertions, 0 deletions

diff --git a/nixos/modules/services/scheduling/chronos.nix b/nixos/modules/services/scheduling/chronos.nix
new file mode 100644
index 000000000000..277cdd632809
--- /dev/null
+++ b/nixos/modules/services/scheduling/chronos.nix
@@ -0,0 +1,54 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.chronos;
+
+in {
+
+  ###### interface
+
+  options.services.chronos = {
+    enable = mkOption {
+      description = "Whether to enable graphite web frontend.";
+      default = false;
+      type = types.uniq types.bool;
+    };
+
+    httpPort = mkOption {
+      description = "Chronos listening port";
+      default = 8080;
+      type = types.int;
+    };
+
+    master = mkOption {
+      description = "Chronos mesos master zookeeper address";
+      default = "zk://${head cfg.zookeeperHosts}/mesos";
+      type = types.str;
+    };
+
+    zookeeperHosts = mkOption {
+      description = "Chronos mesos zookepper addresses";
+      default = [ "localhost:2181" ];
+      type = types.listOf types.str;
+    };
+  };
+
+  ###### implementation
+
+  config = mkIf cfg.enable {
+    systemd.services.chronos = {
+      description = "Chronos Service";
+      wantedBy = [ "multi-user.target" ];
+      after = [ "network-interfaces.target" "zookeeper.service" ];
+
+      serviceConfig = {
+        ExecStart = "${pkgs.chronos}/bin/chronos --master ${cfg.master} --zk_hosts ${concatStringsSep "," cfg.zookeeperHosts} --http_port ${toString cfg.httpPort}";
+        User = "chronos";
+      };
+    };
+
+    users.extraUsers.chronos.uid = config.ids.uids.chronos;
+  };
+}