Upgraded snowfall lib

modules/nixos/services/prometheus/default.nix

@@ -0,0 +1,59 @@
+{
+  options,
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+with lib; let
+  cfg = config.aa.services.prometheus;
+  exporters = config.services.prometheus.exporters;
+in {
+  options.aa.services.prometheus = with types; {
+    enable = mkEnableOption "prometheus";
+    enableServer = mkOption {
+      type = bool;
+      default = false;
+      description = "Whether or not to enable the prometheus server";
+    };
+    enableNodeExporter = mkOption {
+      type = bool;
+      default = true;
+      description = "Whether or not to enable the node exporter";
+    };
+  };
+
+  config = mkIf cfg.enable {
+    services.prometheus = {
+      enable = cfg.enableServer;
+      exporters = {
+        node = {
+          enable = cfg.enableNodeExporter;
+          enabledCollectors = ["systemd"];
+          port = 9002;
+          openFirewall = true;
+        };
+      };
+      scrapeConfigs = mkIf cfg.enableServer [
+        {
+          job_name = "node";
+          static_configs = [
+            {
+              # TODO: How to automatically generate this whenever an exporter
+              # is configured
+              targets = [
+                "node:${toString exporters.node.port}"
+                "gospel:${toString exporters.node.port}"
+                "pi4:${toString exporters.node.port}"
+              ];
+            }
+          ];
+        }
+      ];
+    };
+
+    networking.firewall = mkIf cfg.enableServer {
+      allowedTCPPorts = [config.services.prometheus.port];
+    };
+  };
+}