Add a new metrics stack

hosts/ildkule/services/metrics/grafana.nix

@@ -0,0 +1,29 @@
+{ config, pkgs, ... }:
+
+{
+  services.grafana = {
+    enable = true;
+    settings.server = {
+      domain = "ildkule.pvv.ntnu.no";
+      http_port = 2342;
+      http_addr = "127.0.0.1";
+    };
+  };
+
+  services.nginx.virtualHosts.${config.services.grafana.domain} = {
+    locations = {
+      "/" = {
+        proxyPass = "http://${config.services.grafana.addr}:${toString config.services.grafana.port}";
+        proxyWebsockets = true;
+        extraConfig = ''
+          proxy_buffers 8 1024k;
+          proxy_buffer_size 1024k;
+          proxy_set_header Host $host;
+          proxy_set_header X-Real-IP $remote_addr;
+          proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+          proxy_set_header X-Forwarded-Proto $scheme;
+        '';
+      };
+    };
+  };
+}