From 471a94d3e59983a1c577ee8cb4763e29156afedc Mon Sep 17 00:00:00 2001
From: Johannes Rothe <mail@johannes-rothe.de>
Date: Mon, 17 Mar 2025 22:02:49 +0100
Subject: [PATCH] Enable dalinar monitoring with prometheus and grafana

---
 hosts/dalinar/default.nix | 46 ++++++++++++++++++++++++++++++++++++++-
 1 file changed, 45 insertions(+), 1 deletion(-)

diff --git a/hosts/dalinar/default.nix b/hosts/dalinar/default.nix
index 4fb2e4f..0b3e9b1 100644
--- a/hosts/dalinar/default.nix
+++ b/hosts/dalinar/default.nix
@@ -30,6 +30,9 @@
   networking.firewall = {
     enable = true;
     allowedUDPPorts = [ 53 ];
+    allowedTCPPorts = [
+      config.services.grafana.settings.server.http_port
+    ];
   };
   networking.useNetworkd = true;
   services.resolved = {
@@ -100,7 +103,7 @@
     enable = true;
     settings = {
       upstreams.groups.default = [
-        "127.0.0.1:${builtins.toString config.services.unbound.settings.server.port}"
+        "127.0.0.1:${toString config.services.unbound.settings.server.port}"
       ];
       blocking = {
         denylists.ads = [
@@ -128,6 +131,47 @@
     # TODO set data dir
   };
 
+  services.prometheus = {
+    enable = true;
+    retentionTime = "60d";
+    globalConfig.scrape_interval = "15s";
+    scrapeConfigs = [
+      {
+        job_name = "node";
+        static_configs = [{
+          targets = [ "localhost:${toString config.services.prometheus.exporters.node.port}" ];
+        }];
+      }
+      {
+        job_name = "blocky";
+        static_configs = [{
+          targets = [ "localhost:${toString config.services.blocky.settings.ports.http}" ];
+        }];
+      }
+    ];
+    exporters.node = {
+      enable = true;
+      enabledCollectors = [
+        "systemd"
+      ];
+      disabledCollectors = [
+        "textfile"
+      ];
+      port = 9100;
+    };
+  };
+
+  services.grafana = {
+    enable = true;
+    settings = {
+      server = {
+        http_addr = "0.0.0.0";
+        http_port = 3000;
+        domain = "dalinar";
+      };
+    };
+  };
+
   # This option defines the first version of NixOS you have installed on this particular machine,
   # and is used to maintain compatibility with application data (e.g. databases) created on older NixOS versions.
   #