nixos/prometheux-exporters/rasdaemon: init

(cherry picked from commit f6f1feb)

nixos/modules/services/monitoring/prometheus/exporters.nix

@@ -73,6 +73,7 @@ let
     "process"
     "pve"
     "py-air-control"
+    "rasdaemon"
     "redis"
     "restic"
     "rspamd"

nixos/modules/services/monitoring/prometheus/exporters/rasdaemon.nix

@@ -0,0 +1,67 @@
+{
+  config,
+  lib,
+  pkgs,
+  utils,
+  ...
+}:
+
+let
+  inherit (lib)
+    getExe
+    mkOption
+    types
+    ;
+
+  inherit (utils) escapeSystemdExecArgs;
+
+  cfg = config.services.prometheus.exporters.rasdaemon;
+in
+{
+  port = 10029;
+  extraOpts = with types; {
+    databasePath = mkOption {
+      type = path;
+      default = "/var/lib/rasdaemon/ras-mc_event.db";
+      description = ''
+        Path to the RAS daemon machine check event database.
+      '';
+    };
+
+    enabledCollectors = mkOption {
+      type = listOf (enum [
+        "aer"
+        "mce"
+        "mc"
+        "extlog"
+        "devlink"
+        "disk"
+      ]);
+      default = [
+        "aer"
+        "mce"
+        "mc"
+      ];
+      description = ''
+        List of error types to collect from the event database.
+      '';
+    };
+  };
+  serviceOpts = {
+    serviceConfig = {
+      ExecStart = escapeSystemdExecArgs (
+        [
+          (getExe pkgs.prometheus-rasdaemon-exporter)
+          "--address"
+          cfg.listenAddress
+          "--port"
+          (toString cfg.port)
+          "--db"
+          cfg.databasePath
+        ]
+        ++ map (collector: "--collector-${collector}") cfg.enabledCollectors
+        ++ cfg.extraFlags
+      );
+    };
+  };
+}