feat: expose gitea metrics (#340)

- add a gitea-metrics service to consul
- tag as metrics for victoria metrics
- check the /metrics endpoint (bypass nginx)

Reviewed-on: https://git.query.consul/unkinben/puppet-prod/pulls/340

hieradata/roles/infra/git/server.yaml

@@ -32,10 +32,27 @@ consul::services:
         tls_skip_verify: true
         interval: '10s'
         timeout: '1s'
+  gitea-metrics:
+    service_name: 'gitea-metrics'
+    address: "%{facts.networking.ip}"
+    port: 3000
+    tags:
+      - metrics
+    checks:
+      - id: 'gitea_metrics_http_check'
+        name: 'Gitea Metrics HTTP Check'
+        http: "http://%{facts.networking.fqdn}:3000/metrics"
+        method: 'GET'
+        tls_skip_verify: true
+        interval: '10s'
+        timeout: '1s'
 profiles::consul::client::node_rules:
   - resource: service
     segment: git
     disposition: write
+  - resource: service
+    segment: gitea-metrics
+    disposition: write
 
 # manage the gitea user
 profiles::gitea::user::manage: true