nixos/prometheus: add configText option for alertmanager

The reason being less mental overhead when reading upstream documentation. Examples can be pasted right into the configuration instead of translating to Nix attrset first.
NixOS · Jan 14, 2017 · d241394 · d241394
1 parent 7d75dd7
commit d241394
Showing 1 changed file with 16 additions and 1 deletion.
diff --git a/nixos/modules/services/monitoring/prometheus/alertmanager.nix b/nixos/modules/services/monitoring/prometheus/alertmanager.nix
@@ -5,6 +5,10 @@ with lib;
 let
   cfg = config.services.prometheus.alertmanager;
   mkConfigFile = pkgs.writeText "alertmanager.yml" (builtins.toJSON cfg.configuration);
+  alertmanagerYml =
+    if cfg.configText != null then
+      pkgs.writeText "alertmanager.yml" cfg.configText
+    else mkConfigFile;
 in {
   options = {
     services.prometheus.alertmanager = {
@@ -34,6 +38,17 @@ in {
         '';
       };
 
+      configText = mkOption {
+        type = types.nullOr types.lines;
+        default = null;
+        description = ''
+          Alertmanager configuration as YAML text. If non-null, this option
+          defines the text that is written to alertmanager.yml. If null, the
+          contents of alertmanager.yml is generated from the structured config
+          options.
+        '';
+      };
+
       logFormat = mkOption {
         type = types.nullOr types.str;
         default = null;
@@ -96,7 +111,7 @@ in {
       after    = [ "network.target" ];
       script = ''
         ${pkgs.prometheus-alertmanager.bin}/bin/alertmanager \
-        -config.file ${mkConfigFile} \
+        -config.file ${alertmanagerYml} \
         -web.listen-address ${cfg.listenAddress}:${toString cfg.port} \
         -log.level ${cfg.logLevel} \
         ${optionalString (cfg.webExternalUrl != null) ''-web.external-url ${cfg.webExternalUrl} \''}