add prometheus monitoring

apps/media/ingress.yaml

@@ -26,7 +26,7 @@ spec:
   entryPoints:
     - websecure
   routes:
-    - match: Host(`media-backend.kluster.moll.re`)
+    - match: Host(`media-backend.kluster.moll.re`) && !Path(`/metrics`)
       middlewares:
         - name: jellyfin-websocket
         - name: jellyfin-server-headers

apps/media/jellyfin.servicemonitor.yaml

@@ -0,0 +1,14 @@
+apiVersion: monitoring.coreos.com/v1
+kind: ServiceMonitor
+metadata:
+  name: jellyfin
+spec:
+  selector:
+    matchLabels:
+      app: jellyfin-server
+  endpoints:
+  - port: 8096
+
+# this exposes metrics on port 8096 as enabled in the jellyfin config
+# https://jellyfin.org/docs/general/networking/monitoring/
+# the metrics are available at /metrics but blocked by the ingress

apps/media/kustomization.yaml

@@ -10,6 +10,7 @@ resources:
   - web.deployment.yaml
   - web.service.yaml
   - ingress.yaml
+  - jellyfin.servicemonitor.yaml
 
 images:
   - name: jellyfin/jellyfin