Initial grafana setup

applications/grafana.nix

@@ -0,0 +1,63 @@
+{lib, ...}:
+with lib; let
+  name = "grafana-server";
+  cfg = config.server.grafana;
+in {
+  imports = [
+    ./acme.nix
+    ./dns.nix
+  ];
+
+  options.services.skynet.grafana = {
+    enable = mkEnableOption "Grafana Server";
+
+    host = {
+      ip = mkOption {
+        type = types.str;
+      };
+      name = mkOption {
+        type = types.str;
+      };
+    };
+
+    ip = mkOption {
+      type = types.str;
+      default = cfg.host.ip;
+    };
+
+    port = mkOption {
+      type = types.port;
+      default = 4444;
+    };
+  };
+
+  config = {
+    services.grafana = {
+      enable = true;
+      domain = "grafana.skynet.ie";
+      port = cfg.port;
+      addr = cfg.host.ip;
+    };
+
+    services.nginx.virtualHosts."${name}.skynet.ie" = {
+      forceSSL = true;
+      useACMEHost = "skynet";
+      locations."/" = {
+        proxyPass = "https://localhost:${toString cfg.port}";
+        proxyWebsockets = true;
+      };
+    };
+
+    skynet_dns.records = [
+      {
+        record = "${name}";
+        r_type = "CNAME";
+        value = cfg.host.name;
+      }
+    ];
+
+    skynet_acme.domains = [
+      "${name}.skynet.ie"
+    ];
+  };
+}

machines/_base.nix

@@ -116,6 +116,17 @@ in {
       ];
     };
 
+    services.prometheus = {
+      exporters = {
+        node = {
+          enable = true;
+          # most of the collectors should be on by default
+          enabledCollectors = ["systemd"];
+          port = 9002;
+        };
+      };
+    };
+
     # time on vendetta is strangely out of sync
     networking.timeServers = options.networking.timeServers.default ++ ["ie.pool.ntp.org"];
     services.ntp.enable = true;

machines/marvin.nix

@@ -25,6 +25,7 @@ Notes:
   groups_trusted = map (x: "@${x}") groups;
 in {
   imports = [
+    ../applications/grafana.nix
   ];
 
   deployment = {
@@ -49,6 +50,15 @@ in {
     sudo_groups = groups;
   };
 
+  services.skynet.grafana = {
+    enable = true;
+
+    host = {
+      ip = ip_pub;
+      name = name;
+    };
+  };
+
   skynet_dns.records = [
     {
       record = name;