home lab init

nixos/hosts/monitoring/prometheus.nix

@@ -0,0 +1,70 @@
+{ config, pkgs, modulesPath, lib, ... }:
+
+let
+  monitor_ip = "monitor.local";
+  traefik_ip = "traefik.local";
+  sandbox_ip = "sandbox.local";
+  forgejo_ip = "forgejo.local";
+
+  prometheus_exporter_port = 9100;
+  promtail_port = 9080;
+  traefik_monitor_port = 8082;
+  forgejo_monitor_port = 3000;
+in {
+  networking.firewall.allowedTCPPorts = [ 9090 ];
+
+  services.prometheus = {
+    enable = true;
+    retentionTime = "7d";
+    globalConfig = {
+      scrape_timeout = "10s";
+      scrape_interval = "30s";
+    };
+    scrapeConfigs = [
+      {
+        job_name = "node";
+        static_configs = [
+          {
+            targets = [
+              "${monitor_ip}:${toString prometheus_exporter_port}"
+              "${traefik_ip}:${toString prometheus_exporter_port}"
+              "${sandbox_ip}:${toString prometheus_exporter_port}"
+              "${forgejo_ip}:${toString prometheus_exporter_port}"
+            ];
+          }
+        ];
+      }
+      {
+        job_name = "traefik";
+        static_configs = [
+          { targets = [ "${traefik_ip}:${toString traefik_monitor_port}" ]; }
+        ];
+      }
+      {
+        job_name = "gitea";
+        static_configs = [
+          { targets = [ "${forgejo_ip}:${toString forgejo_monitor_port}" ]; }
+        ];
+      }
+      {
+        job_name = "postgres";
+        static_configs = [
+          { targets = [ "${forgejo_ip}:9187" ]; }
+        ];
+      }
+      {
+        job_name = "promtail";
+        static_configs = [
+          {
+            targets = [
+              "${monitor_ip}:${toString promtail_port}"
+              "${traefik_ip}:${toString promtail_port}"
+              "${sandbox_ip}:${toString promtail_port}"
+              "${forgejo_ip}:${toString promtail_port}"
+            ];
+          }
+        ];
+      }
+    ];
+  };
+}