Setup prometheus with node

nixos/viridian/services/prometheus.nix

@@ -0,0 +1,33 @@
+{ config, ... }:
+
+{
+  services.prometheus = {
+    enable = true;
+    port = 9001;  # Port to listen on.
+
+    # Valid in all configuration contexts, defaults for other configuration sections.
+    globalConfig = {
+      scrape_interval = "15s";
+    };
+
+    # Collect specific metrics, format them, and expose them through HTTP endpoints for prometheus to scrape.
+    exporters = {
+      node = {
+        enable = true;
+        enabledCollectors = [ "systemd" "processes" ];
+        port = 9100;
+      };
+    };
+
+    # Specify a set of targets and parameters describing how to scrape them.
+    scrapeConfigs = [
+      {
+        job_name = "node";
+        static_configs = [{
+          targets = [ "127.0.0.1:${toString config.services.prometheus.exporters.node.port}" ];
+        }];
+      }
+    ];
+  };
+}
+