Add basic prometheus/grafana setup

bert/services/monitoring.nix

@@ -0,0 +1,41 @@
+{
+  services.prometheus = {
+    enable = true;
+    scrapeConfigs = [
+      {
+        job_name = "caddy";
+        static_configs = [{
+          targets = [
+            "localhost:2019"
+          ];
+        }];
+      }
+      {
+        job_name = "node";
+        static_configs = [{
+          targets = [
+            "localhost:9100"
+          ];
+        }];
+      }
+    ];
+    exporters.node = {
+      enable = true;
+      # https://github.com/NixOS/nixpkgs/blob/nixos-24.05/nixos/modules/services/monitoring/prometheus/exporters.nix
+      enabledCollectors = [ "systemd" ];
+      # /nix/store/zgsw0yx18v10xa58psanfabmg95nl2bb-node_exporter-1.8.1/bin/node_exporter  --help
+      # extraFlags = [ "--collector.ethtool" "--collector.softirqs" "--collector.tcpstat" "--collector.wifi" ];
+    };
+  };
+
+  services.grafana = {
+    enable = true;
+    settings = {
+      server = {
+        root_url = "https://home.chandlerswift.com/grafana/";
+        serve_from_sub_path = true;
+      };
+    };
+  };
+
+}