scollector: New NixOS module

nixos/modules/misc/ids.nix

@@ -167,6 +167,7 @@
       docker-registry = 157;
       hbase = 158;
       opentsdb = 159;
+      scollector = 160;
 
       # When adding a uid, make sure it doesn't match an existing gid. And don't use uids above 399!
 
@@ -298,6 +299,7 @@
       systemd-resolve = 153;
       systemd-timesync = 154;
       liquidsoap = 155;
+      scollector = 156;
 
       # When adding a gid, make sure it doesn't match an existing uid. And don't use gids above 399!
 

nixos/modules/module-list.nix

@@ -198,6 +198,7 @@
   ./services/monitoring/nagios.nix
   ./services/monitoring/riemann.nix
   ./services/monitoring/riemann-dash.nix
+  ./services/monitoring/scollector.nix
   ./services/monitoring/smartd.nix
   ./services/monitoring/statsd.nix
   ./services/monitoring/systemhealth.nix

nixos/modules/services/monitoring/scollector.nix

@@ -0,0 +1,88 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.scollector;
+
+in {
+
+  options = {
+
+    services.scollector = {
+
+      enable = mkOption {
+        type = types.bool;
+        default = false;
+        description = ''
+          Whether to run scollector.
+        '';
+      };
+
+      package = mkOption {
+        type = types.package;
+        default = pkgs.scollector;
+        example = literalExample "pkgs.scollector";
+        description = ''
+          scollector binary to use.
+        '';
+      };
+
+      user = mkOption {
+        type = types.string;
+        default = "scollector";
+        description = ''
+          User account under which scollector runs.
+        '';
+      };
+
+      group = mkOption {
+        type = types.string;
+        default = "scollector";
+        description = ''
+          Group account under which scollector runs.
+        '';
+      };
+
+      opentsdbHost = mkOption {
+        type = types.string;
+        default = "localhost:4242";
+        description = ''
+          Host and port of the OpenTSDB database that will store the collected
+          data.
+        '';
+      };
+
+    };
+
+  };
+
+  config = mkIf config.services.scollector.enable {
+
+    systemd.services.scollector = {
+      description = "scollector metrics collector (part of Bosun)";
+      wantedBy = [ "multi-user.target" ];
+
+      path = [ pkgs.coreutils pkgs.iproute ];
+
+      serviceConfig = {
+        PermissionsStartOnly = true;
+        User = cfg.user;
+        Group = cfg.group;
+        ExecStart = ''
+          ${cfg.package}/bin/scollector -h=${cfg.opentsdbHost}
+        '';
+      };
+    };
+
+    users.extraUsers.scollector = {
+      description = "scollector user";
+      group = "scollector";
+      uid = config.ids.uids.scollector;
+    };
+
+    users.extraGroups.scollector.gid = config.ids.gids.scollector;
+
+  };
+
+}