feat(modules): Add random-alerts module

Author: MartinNikov

modules/default.nix

@@ -5,5 +5,6 @@
     ./pyroscope
     ./folder-size-metrics
     ./shard-split
+    ./random-alerts
   ];
 }

modules/random-alerts/default.nix

@@ -0,0 +1,77 @@
+{ withSystem, ... }:
+{
+  flake.modules.nixos.random-alerts =
+    {
+      pkgs,
+      config,
+      lib,
+      ...
+    }:
+    let
+      cfg = config.services.random-alerts;
+      pkg = withSystem pkgs.stdenv.hostPlatform.system ({ config, ... }: config.packages.random-alerts);
+    in
+    {
+      options.services.random-alerts = with lib; {
+        enable = mkEnableOption (lib.mdDoc "Random Alerts");
+        args = {
+          url = mkOption {
+            type = types.str;
+            example = "http://localhost:9093";
+            description = ''Alertmanager URL'';
+          };
+
+          min-wait-time = mkOption {
+            type = types.int;
+            default = 3600;
+            example = 360;
+            description = ''Minimum wait time before alert in seconds'';
+          };
+
+          max-wait-time = mkOption {
+            type = types.int;
+            default = 14400;
+            example = 6000;
+            description = ''Maximum wait time before alert in seconds'';
+          };
+
+          alert-duration = mkOption {
+            type = types.int;
+            default = 3600;
+            example = 360;
+            description = ''Time after alerts ends in seconds'';
+          };
+
+          log-level = mkOption {
+            type = types.enum [
+              "info"
+              "trace"
+              "error"
+            ];
+            default = "info";
+          };
+        };
+      };
+
+      config =
+        let
+          concatMapAttrsStringSep =
+            sep: f: attrs:
+            lib.concatStringsSep sep (lib.attrValues (lib.mapAttrs f attrs));
+
+          args = concatMapAttrsStringSep " " (n: v: "--${n}=${toString v}") cfg.args;
+        in
+        lib.mkIf cfg.enable {
+          systemd.services.random-alerts = {
+            description = "Random Alerts";
+
+            wantedBy = [ "multi-user.target" ];
+            serviceConfig = {
+              DynamicUser = lib.mkDefault true;
+              Restart = lib.mkDefault "on-failure";
+              ExecStart = "${lib.getExe pkg} ${args}";
+            };
+          };
+        };
+    };
+}