From 7ca9bf89751d2027a6c093f09cfa54adfe30c9df Mon Sep 17 00:00:00 2001
From: Katharina Heidenreich <katharina.heidenreich@stud.tu-darmstadt.de>
Date: Sat, 11 Apr 2026 13:17:18 +0200
Subject: [PATCH] feat: add prometheus config

---
 config/services.nix     | 18 ++++++++++++++++++
 services/default.nix    |  1 +
 services/prometheus.nix | 24 ++++++++++++++++++++++++
 3 files changed, 43 insertions(+)
 create mode 100644 services/prometheus.nix

diff --git a/config/services.nix b/config/services.nix
index d62ce92..c73f456 100644
--- a/config/services.nix
+++ b/config/services.nix
@@ -11,4 +11,22 @@ rec {
       "processes"
     ];
   };
+
+  prometheus = {
+    port = 9090;
+    scrapeConfigs = {
+      node = {
+        scrape_interval = "60s";
+        metrics_path = "/metrics";
+        static_configs = [
+          {
+            targets = [ 
+              "localhost:9100"
+              "pi.home:9100"
+            ];
+          }
+        ];
+      };
+    };
+  };
 }
diff --git a/services/default.nix b/services/default.nix
index 1e9cfb5..a87a956 100644
--- a/services/default.nix
+++ b/services/default.nix
@@ -4,5 +4,6 @@
     ./openssh.nix
     ./forgejo.nix
     ./node-exporter.nix
+    ./prometheus.nix
   ];
 }
diff --git a/services/prometheus.nix b/services/prometheus.nix
new file mode 100644
index 0000000..1c028c3
--- /dev/null
+++ b/services/prometheus.nix
@@ -0,0 +1,24 @@
+{lib, ...}:
+let 
+  serv = import ../config/services.nix;
+  conf = lib.attrsets.mapAttrsToList (name: cfg: {
+    job_name = name;
+
+    scrape_interval = cfg.scrape_interval;
+
+    metrics_path = cfg.metrics_path;
+    
+    static_configs = cfg.static_configs;
+  }) serv.prometheus.scrapeConfigs;
+in
+{
+  services.prometheus = {
+    enable = true;
+
+    scrapeConfigs = conf;
+
+    port = serv.prometheus.port;
+  };
+
+  networking.firewall.allowedTCPPorts = [ serv.prometheus.port ];
+}
\ No newline at end of file