feat(grafana): provision node-exporter dashboard

hosts/flora-6/apps/grafana.nix

@@ -21,6 +21,14 @@
     owner = "grafana";
   };
 
+  environment.etc = {
+    "grafana-dashboards/node-exporter-full_rev33.json" = {
+      source = ./grafana-dashboards/node-exporter-full_rev33.json;
+      group = "grafana";
+      user = "grafana";
+    };
+  };
+
   services.grafana = {
     enable = true;
     settings = {
@@ -64,5 +72,37 @@
         allow_assign_grafana_admin = true;
       };
     };
+    provision = {
+      enable = true;
+      datasources = {
+        settings = {
+          datasources = [
+            {
+              name = "Prometheus";
+              type = "prometheus";
+              access = "proxy";
+              url = "http://127.0.0.1:${toString config.services.prometheus.port}";
+              isDefault = true;
+            }
+            {
+              name = "Loki";
+              type = "loki";
+              access = "proxy";
+              url = "http://127.0.0.1:${toString config.services.loki.configuration.server.http_listen_port}";
+            }
+          ];
+        };
+      };
+      dashboards = {
+        settings = {
+          providers = [
+            {
+              name = "pub.solar Dashboards";
+              options.path = "/etc/grafana-dashboards";
+            }
+          ];
+        };
+      };
+    };
   };
 }

hosts/flora-6/apps/prometheus.nix

@@ -20,6 +20,9 @@
         job_name = "flora-6";
         static_configs = [{
           targets = [ "127.0.0.1:${toString config.services.prometheus.exporters.node.port}" ];
+          labels = {
+            instance = "flora-6";
+          };
         }];
       }
     ];