From 817927b7e25d4a3cf764dce8a146c8d3f16fa5fa Mon Sep 17 00:00:00 2001
From: notohh <github@notohh.dev>
Date: Tue, 6 Jun 2023 00:08:22 -0400
Subject: [PATCH] sakura: init basic grafana / prometheus

---
 hosts/sakura/services/default.nix    |  2 ++
 hosts/sakura/services/grafana.nix    | 34 ++++++++++++++++++++++++++++
 hosts/sakura/services/prometheus.nix | 23 +++++++++++++++++++
 hosts/sakura/services/traefik.nix    |  8 +++++++
 4 files changed, 67 insertions(+)
 create mode 100644 hosts/sakura/services/grafana.nix
 create mode 100644 hosts/sakura/services/prometheus.nix

diff --git a/hosts/sakura/services/default.nix b/hosts/sakura/services/default.nix
index e32b7ba..e8762d7 100644
--- a/hosts/sakura/services/default.nix
+++ b/hosts/sakura/services/default.nix
@@ -9,5 +9,7 @@
     ./forgejo.nix
     ./jellyfin.nix
     ./rustypaste.nix
+    ./grafana.nix
+    ./prometheus.nix
   ];
 }
diff --git a/hosts/sakura/services/grafana.nix b/hosts/sakura/services/grafana.nix
new file mode 100644
index 0000000..6e095b3
--- /dev/null
+++ b/hosts/sakura/services/grafana.nix
@@ -0,0 +1,34 @@
+{...}: {
+  services.grafana = {
+    enable = true;
+    settings = {
+      server = {
+        root_url = "https://metrics.notohh.dev";
+        domain = "metrics.notohh.dev";
+        enforce_domain = true;
+        http_addr = "0.0.0.0";
+        http_port = 3100;
+      };
+      auth = {
+        disable_login_form = false;
+      };
+      users = {
+        allow_signup = false;
+        auto_assign_org = true;
+        auto_assign_org_role = "Viewer";
+      };
+    };
+    provision = {
+      datasources.settings = {
+        datasources = [
+          {
+            name = "Prometheus";
+            type = "prometheus";
+            url = "http://127.0.0.0:9090";
+            orgId = 1;
+          }
+        ];
+      };
+    };
+  };
+}
diff --git a/hosts/sakura/services/prometheus.nix b/hosts/sakura/services/prometheus.nix
new file mode 100644
index 0000000..f5e70c9
--- /dev/null
+++ b/hosts/sakura/services/prometheus.nix
@@ -0,0 +1,23 @@
+{...}: {
+  services.prometheus = {
+    enable = true;
+    scrapeConfigs = [
+      {
+        job_name = "prometheus";
+        scrape_interval = "30s";
+        static_configs = [{targets = ["127.0.0.0:9090"];}];
+      }
+      {
+        job_name = "node";
+        scrape_interval = "30s";
+        static_configs = [{targets = ["127.0.0.0:9100"];}];
+      }
+    ];
+    exporters = {
+      node = {
+        enable = true;
+        enabledCollectors = ["systemd" "cpu"];
+      };
+    };
+  };
+}
diff --git a/hosts/sakura/services/traefik.nix b/hosts/sakura/services/traefik.nix
index 58ac533..471abc8 100644
--- a/hosts/sakura/services/traefik.nix
+++ b/hosts/sakura/services/traefik.nix
@@ -68,6 +68,13 @@
             tls.domains = [{main = "*.notohh.dev";}];
             tls.certresolver = "production";
           };
+          grafana = {
+            rule = "Host(`metrics.notohh.dev`)";
+            entrypoints = ["websecure"];
+            service = "grafana";
+            tls.domains = [{main = "*.notohh.dev";}];
+            tls.certresolver = "production";
+          };
         };
         services = {
           homepage.loadBalancer.servers = [{url = "http://localhost:3005";}];
@@ -78,6 +85,7 @@
           foundryvtt.loadBalancer.servers = [{url = "http://localhost:30000";}];
           gitea.loadBalancer.servers = [{url = "http://localhost:3000";}];
           rustypaste.loadBalancer.servers = [{url = "http://localhost:8000";}];
+          grafana.loadBalancer.servers = [{url = "http://localhost:3100";}];
         };
       };
     };