feat: Expose Metrics Port & prometheus scrape annotations(#86)

eklesel · web-flow · commit 1f60282a7d1b · 2025-07-11T11:07:10.000+02:00
diff --git a/charts/lakekeeper/Changelog.md b/charts/lakekeeper/Changelog.md
@@ -10,6 +10,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Changed
 
 ### Added
+* Expose Metrics Port 9000 for Catalog Pods
+* Add boolean `catalog.prometheus.setScrapeAnnotations` configuration option to set prometheus scrape labels
 
 ### Fixed
 
diff --git a/charts/lakekeeper/README.md b/charts/lakekeeper/README.md
@@ -97,6 +97,7 @@ For potential additional steps that are required for upgrades, please check the
 | catalog.podDisruptionBudget.minAvailable | string | `""` | the minimum available pods/percentage for the catalog |
 | catalog.podLabels | object | `{}` | Pod labels for the catalog Deployment |
 | catalog.podSecurityContext | <html><a href="https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.29/#podsecuritycontext-v1-core">podsecuritycontext-v1-core</a></html> | `{}` |  security context for the catalog Pods. `runAsUser` and `runAsGroup` are ignored for the catalog container, please set with `catalog.image.uid` and `catalog.image.gid` |
+| catalog.prometheus.setScrapeAnnotations | bool | `false` | Adds the prometheus.io/port and prometheus.io/scrape annotations to the catalog Pods. |
 | catalog.readinessProbe.enabled | bool | `true` | if the readiness probes of the catalog Pods are enabled |
 | catalog.readinessProbe.failureThreshold | int | `5` |  |
 | catalog.readinessProbe.initialDelaySeconds | int | `1` |  |
diff --git a/charts/lakekeeper/templates/catalog/catalog-deployment.yaml b/charts/lakekeeper/templates/catalog/catalog-deployment.yaml
@@ -30,6 +30,10 @@ spec:
         {{- if .Values.catalog.safeToEvict }}
         cluster-autoscaler.kubernetes.io/safe-to-evict: "true"
         {{- end }}
+        {{- if .Values.catalog.prometheus.setScrapeAnnotations }}
+        prometheus.io/port: "9000"
+        prometheus.io/scrape: "true"
+        {{- end }}
       labels:
         {{- include "iceberg-catalog.labels" . | nindent 8 }}
         app.kubernetes.io/component: catalog
@@ -82,6 +86,9 @@ spec:
             - name: http
               containerPort: 8181
               protocol: TCP
+            - name: metrics
+              containerPort: 9000
+              protocol: TCP
           {{- if .Values.catalog.command }}
           command:
             {{- toYaml .Values.catalog.command | nindent 12 }}
diff --git a/charts/lakekeeper/values.yaml b/charts/lakekeeper/values.yaml
@@ -297,6 +297,10 @@ catalog:
       # -- the name of a pre-created Secret containing a TLS private key and certificate
       secretName: ""
 
+  prometheus:
+    # -- Adds the prometheus.io/port and prometheus.io/scrape annotations to the catalog Pods.
+    setScrapeAnnotations: false
+
 serviceAccount:
   # -- Specifies whether a service account should be created.
   # If `false`, you must create the you must create the service account outside this chart with name: `serviceAccount.name`
