docs: Add controller metrics guide and Grafana dashboard for Redis Operator (#1438)

* feat(monitoring): expose existing controller metrics via operator pod and add docs/dashboard

Signed-off-by: Fatih Sarhan <[email protected]>

* docs(metrics): add spacing for improved readability in auto-generated metrics docs

Signed-off-by: Fatih Sarhan <[email protected]>

* custom port

Signed-off-by: yangw <[email protected]>

* upgrade

Signed-off-by: yangw <[email protected]>

---------

Signed-off-by: Fatih Sarhan <[email protected]>
Signed-off-by: yangw <[email protected]>
Co-authored-by: yangw <[email protected]>

Author: f9n

charts/redis-operator/Chart.yaml

@@ -1,11 +1,12 @@
 ---
 apiVersion: v2
-version: 0.21.1
+version: 0.21.2
 appVersion: "0.21.0"
 description: Provides easy redis setup definitions for Kubernetes services, and deployment.
 engine: gotpl
 maintainers:
   - name: iamabhishek-dubey
+  
   - name: sandy724
   - name: shubham-cmyk
 name: redis-operator

charts/redis-operator/templates/operator-deployment.yaml

@@ -50,13 +50,21 @@ spec:
         {{- if .Values.redisOperator.pprof.enabled }}
         - --pprof-bind-address={{ .Values.redisOperator.pprof.bindAddress }}
         {{- end }}
+        {{- if .Values.redisOperator.metrics.enabled }}
+        - --metrics-bind-address={{ .Values.redisOperator.metrics.bindAddress }}
+        {{- end }}
         {{- range $arg := .Values.redisOperator.extraArgs }}
         - {{ $arg }}
         {{- end }}
         ports:
         - containerPort: 8081
           name: probe
           protocol: TCP
+      {{- if .Values.redisOperator.metrics.enabled }}
+        - containerPort: {{ .Values.redisOperator.metrics.bindAddress | regexFind ":[0-9]+" | trimPrefix ":" }}
+          name: metrics
+          protocol: TCP
+      {{- end }}
       {{- if .Values.redisOperator.pprof.enabled }}
         - containerPort: {{ .Values.redisOperator.pprof.bindAddress | regexFind ":[0-9]+" | trimPrefix ":" }}
           name: pprof

charts/redis-operator/values.yaml

@@ -31,6 +31,13 @@ redisOperator:
     # The address the pprof endpoint binds to
     bindAddress: ":6060"
 
+  # metrics configuration for monitoring
+  metrics:
+    # Enable metrics server
+    enabled: true
+    # The address the metrics endpoint binds to
+    bindAddress: ":8080"
+
 resources:
   limits:
     cpu: 500m