From 099eabb49017fab343731f94033723552a41e722 Mon Sep 17 00:00:00 2001
From: Jaka Hudoklin <jakahudoklin@gmail.com>
Date: Wed, 3 Dec 2014 15:49:14 +0100
Subject: [PATCH] nixos: add chronos service

---
 nixos/modules/misc/ids.nix                    |  1 +
 nixos/modules/module-list.nix                 |  1 +
 nixos/modules/services/scheduling/chronos.nix | 54 +++++++++++++++++++
 3 files changed, 56 insertions(+)
 create mode 100644 nixos/modules/services/scheduling/chronos.nix

diff --git a/nixos/modules/misc/ids.nix b/nixos/modules/misc/ids.nix
index 687e26279e60..2f166f9ccd76 100644
--- a/nixos/modules/misc/ids.nix
+++ b/nixos/modules/misc/ids.nix
@@ -171,6 +171,7 @@
       bosun = 161;
       kubernetes = 162;
       peerflix = 163;
+      chronos = 164;
 
       # When adding a uid, make sure it doesn't match an existing gid. And don't use uids above 399!
 
diff --git a/nixos/modules/module-list.nix b/nixos/modules/module-list.nix
index 9f4f33d137f6..e94cfeaf8d3b 100755
--- a/nixos/modules/module-list.nix
+++ b/nixos/modules/module-list.nix
@@ -292,6 +292,7 @@
   ./services/networking/znc.nix
   ./services/printing/cupsd.nix
   ./services/scheduling/atd.nix
+  ./services/scheduling/chronos.nix
   ./services/scheduling/cron.nix
   ./services/scheduling/fcron.nix
   ./services/search/elasticsearch.nix
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;
+  };
+}