feat(helm): ServiceMonitor + PodMonitor for Prometheus Operator (default enabled)

Author: syscod3

charts/imp/templates/agent/daemonset.yaml

@@ -43,6 +43,10 @@ spec:
               fieldPath: spec.nodeName
         - name: FC_KERNEL
           value: {{ .Values.agent.env.kernelPath | required "agent.env.kernelPath is required" | quote }}
+        ports:
+        - name: metrics
+          containerPort: 9090
+          protocol: TCP
         resources:
           {{- toYaml .Values.agent.resources | nindent 10 }}
         securityContext:

charts/imp/templates/agent/podmonitor.yaml

@@ -0,0 +1,21 @@
+{{- if .Values.metrics.serviceMonitor.enabled }}
+apiVersion: monitoring.coreos.com/v1
+kind: PodMonitor
+metadata:
+  name: {{ include "imp.fullname" . }}-agent
+  namespace: {{ .Release.Namespace }}
+  labels:
+    {{- include "imp.labels" . | nindent 4 }}
+    app.kubernetes.io/component: agent
+spec:
+  selector:
+    matchLabels:
+      {{- include "imp.selectorLabels" . | nindent 6 }}
+      app.kubernetes.io/component: agent
+  podMetricsEndpoints:
+    - port: metrics
+      interval: {{ .Values.metrics.serviceMonitor.interval }}
+  namespaceSelector:
+    matchNames:
+      - {{ .Release.Namespace }}
+{{- end }}

charts/imp/templates/operator/servicemonitor.yaml

@@ -0,0 +1,21 @@
+{{- if .Values.metrics.serviceMonitor.enabled }}
+apiVersion: monitoring.coreos.com/v1
+kind: ServiceMonitor
+metadata:
+  name: {{ include "imp.fullname" . }}-operator
+  namespace: {{ .Release.Namespace }}
+  labels:
+    {{- include "imp.labels" . | nindent 4 }}
+    app.kubernetes.io/component: operator
+spec:
+  selector:
+    matchLabels:
+      {{- include "imp.selectorLabels" . | nindent 6 }}
+      app.kubernetes.io/component: operator
+  endpoints:
+    - port: metrics
+      interval: {{ .Values.metrics.serviceMonitor.interval }}
+  namespaceSelector:
+    matchNames:
+      - {{ .Release.Namespace }}
+{{- end }}

charts/imp/tests/metrics_test.yaml

@@ -0,0 +1,38 @@
+suite: metrics resources
+templates:
+  - templates/operator/servicemonitor.yaml
+  - templates/agent/podmonitor.yaml
+tests:
+  - it: creates ServiceMonitor by default
+    template: templates/operator/servicemonitor.yaml
+    asserts:
+      - isKind:
+          of: ServiceMonitor
+      - equal:
+          path: spec.endpoints[0].port
+          value: metrics
+
+  - it: skips ServiceMonitor when disabled
+    template: templates/operator/servicemonitor.yaml
+    set:
+      metrics.serviceMonitor.enabled: false
+    asserts:
+      - hasDocuments:
+          count: 0
+
+  - it: creates PodMonitor by default
+    template: templates/agent/podmonitor.yaml
+    asserts:
+      - isKind:
+          of: PodMonitor
+      - equal:
+          path: spec.podMetricsEndpoints[0].port
+          value: metrics
+
+  - it: skips PodMonitor when disabled
+    template: templates/agent/podmonitor.yaml
+    set:
+      metrics.serviceMonitor.enabled: false
+    asserts:
+      - hasDocuments:
+          count: 0

charts/imp/values.yaml

@@ -51,3 +51,8 @@ webhook:
     issuerRef: {}
     duration: 8760h
     renewBefore: 720h
+
+metrics:
+  serviceMonitor:
+    enabled: true
+    interval: 30s