all: add prometheus

modules/nixos/prometheus.nix

@@ -1,4 +1,3 @@
-
 { config, pkgs, lib, ... }:
 
 with lib;
@@ -17,13 +16,38 @@ in
           description = "Enable Prometheus exporter on every supported services";
         };
       };
+      grafana = {
+        enable = mkEnableOption "Grafana Cloud";
+        password_file = mkOption {
+          type = types.path;
+        };
+      };
     };
   };
 
-  config = {
+  config = mkMerge [{
+    services.caddy.globalConfig = ''
+      servers {
+        metrics
+      }
+    '';
+    services.restic.server.prometheus = cfg.enable;
+    services.gotosocial.settings = {
+      metrics-enable = true;
+    };
     services.prometheus = mkIf cfg.enable {
       enable = true;
       port = 9091;
+      globalConfig.external_labels = { hostname = config.networking.hostName; };
+      remoteWrite = mkIf cfg.grafana.enable [
+        { name = "grafana";
+          url = "https://prometheus-prod-24-prod-eu-west-2.grafana.net/api/prom/push";
+          basic_auth = {
+            username = "1340065";
+            password_file = cfg.grafana.password_file;
+          };
+        }
+      ];
       exporters = {
         node = {
           enable = true;
@@ -44,5 +68,28 @@ in
         }
       ];
     };
-  };
-}
+  }
+  {
+    services.prometheus.scrapeConfigs = [
+      ( mkIf config.services.caddy.enable {
+        job_name = "caddy";
+        static_configs = [
+          { targets = [ "localhost:2019" ]; }
+        ];
+      })
+      ( mkIf config.services.restic.server.enable {
+        job_name = "restic";
+        static_configs = [
+          { targets = [ config.services.restic.server.listenAddress ]; }
+        ];
+      })
+      ( mkIf config.services.gotosocial.enable {
+        job_name = "gotosocial";
+        static_configs = [
+          { targets = [ "localhost:${toString config.services.gotosocial.settings.port}" ]; }
+        ];
+      })
+    ];
+  }
+  ];
+}