feat: Add ServiceMonitor to the redis-operator helm chart

Signed-off-by: Mario Trangoni <[email protected]>

Author: mjtrangoni

charts/redis-operator/README.md

@@ -115,8 +115,14 @@ kubectl create secret tls <webhook-server-cert> --key tls.key --cert tls.crt -n
 | redisOperator.imagePullPolicy | string | `"Always"` |  |
 | redisOperator.imagePullSecrets | list | `[]` |  |
 | redisOperator.imageTag | string | `""` |  |
-| redisOperator.metrics.bindAddress | string | `":8080"` |  |
-| redisOperator.metrics.enabled | bool | `true` |  |
+| redisOperator.metrics.bindAddress | string | `":8080"` | The address the metrics endpoint binds to |
+| redisOperator.metrics.enabled | bool | `true` | Enable metrics server |
+| redisOperator.metrics.port | string | `"8080"` | The port the metrics endpoint binds to |
+| redisOperator.metrics.serviceMonitor.enabled | bool | `false` |  |
+| redisOperator.metrics.serviceMonitor.extraLabels | object | `{}` | extraLabels are added to the servicemonitor when enabled set to true |
+| redisOperator.metrics.serviceMonitor.interval | string | `"30s"` |  |
+| redisOperator.metrics.serviceMonitor.namespace | string | `""` | Namespace where servicemonitor resource will be created, if empty it will be created in the same namespace as the operator |
+| redisOperator.metrics.serviceMonitor.scrapeTimeout | string | `"10s"` |  |
 | redisOperator.name | string | `"redis-operator"` |  |
 | redisOperator.podAnnotations | object | `{}` |  |
 | redisOperator.podLabels | object | `{}` |  |

charts/redis-operator/templates/service-metrics.yaml

@@ -0,0 +1,23 @@
+{{ if .Values.redisOperator.metrics.enabled }}
+apiVersion: v1
+kind: Service
+metadata:
+  labels:
+    app.kubernetes.io/name : {{ .Values.redisOperator.name | default .Release.Name }}-metrics
+    helm.sh/chart : {{ .Chart.Name }}-{{ .Chart.Version | replace "+" "_" }}
+    app.kubernetes.io/managed-by : {{ .Release.Service }}
+    app.kubernetes.io/instance : {{ .Release.Name }}
+    app.kubernetes.io/version : {{ .Chart.AppVersion }}
+    app.kubernetes.io/component: metrics
+    app.kubernetes.io/part-of : {{ .Release.Name }}
+  name: {{ .Values.redisOperator.name | default .Release.Name }}-metrics
+  namespace:  {{ .Release.Namespace }}
+spec:
+  ports:
+    - name: redis-operator-metrics
+      port: 8080
+      protocol: TCP
+      targetPort: {{ .Values.redisOperator.metrics.port }}
+  selector:
+    name: {{ .Values.redisOperator.name }}
+{{ end }}

charts/redis-operator/templates/servicemonitor.yaml

@@ -0,0 +1,30 @@
+{{- if eq .Values.redisOperator.metrics.serviceMonitor.enabled true }}
+---
+apiVersion: monitoring.coreos.com/v1
+kind: ServiceMonitor
+metadata:
+  name: {{ .Values.redisOperator.name | default .Release.Name }}-prometheus-monitoring
+  namespace: {{ .Values.redisOperator.metrics.serviceMonitor.namespace | default .Release.Namespace }}
+  labels:
+    app.kubernetes.io/name: {{ .Values.redisOperator.name | default .Release.Name }}
+    helm.sh/chart: {{ .Chart.Name }}-{{ .Chart.Version | replace "+" "_" }}
+    app.kubernetes.io/managed-by: {{ .Release.Service }}
+    app.kubernetes.io/instance: {{ .Values.redisOperator.name | default .Release.Name }}
+    app.kubernetes.io/version: {{ .Chart.AppVersion }}
+    app.kubernetes.io/component: middleware
+    {{- with .Values.redisOperator.metrics.serviceMonitor.extraLabels }}
+    {{- toYaml . | nindent 4 }}
+    {{- end }}
+spec:
+  selector:
+    matchLabels:
+      app.kubernetes.io/name : {{ .Values.redisOperator.name | default .Release.Name }}-metrics
+      app.kubernetes.io/component: metrics
+  endpoints:
+  - port: redis-operator-metrics
+    interval: {{ .Values.redisOperator.metrics.serviceMonitor.interval }}
+    scrapeTimeout: {{ .Values.redisOperator.metrics.serviceMonitor.scrapeTimeout }}
+  namespaceSelector:
+    matchNames:
+    - {{ .Release.Namespace }}
+{{- end }}

charts/redis-operator/values.yaml

@@ -33,10 +33,23 @@ redisOperator:
 
   # metrics configuration for monitoring
   metrics:
-    # Enable metrics server
+    # -- Enable metrics server
     enabled: true
-    # The address the metrics endpoint binds to
+    # -- The address the metrics endpoint binds to
     bindAddress: ":8080"
+    # -- The port the metrics endpoint binds to
+    port: "8080"
+    # serviceMonitor configuration
+    serviceMonitor:
+      enabled: false
+      interval: 30s
+      scrapeTimeout: 10s
+      # -- Namespace where servicemonitor resource will be created, if empty it will be created in the same namespace as the operator
+      namespace: ""
+      # -- extraLabels are added to the servicemonitor when enabled set to true
+      extraLabels: {}
+        # foo: bar
+        # team: devops
 
 resources:
   limits: