Add pod monitor for Prometheus

.github/workflows/main.yaml

@@ -64,6 +64,11 @@ jobs:
       - name: Setup k3s/k3d
         run: c2cciutils-k8s-install
 
+      - name: Install prometheus CRD
+        run: |
+          curl https://raw.githubusercontent.com/prometheus-operator/prometheus-operator/main/jsonnet/prometheus-operator/podmonitors-crd.json --output /tmp/podmonitors-crd.json
+          kubectl apply -f /tmp/podmonitors-crd.json
+
       - name: Apply
         run: kubectl apply -f tests/expected.yaml
 

templates/podmonitor.yaml

@@ -0,0 +1,24 @@
+{{- range $serviceName, $serviceDefinition := .Values.services }}
+{{- if hasKey $serviceDefinition "podMonitor" }}
+{{- if eq $serviceDefinition.podMonitor.enabled true }}
+---
+apiVersion: monitoring.coreos.com/v1
+kind: PodMonitor
+metadata:
+{{- if hasKey $serviceDefinition.service "name" }}
+  name: {{ $serviceDefinition.service.name }}
+{{- else }}
+  name: {{ include "common.fullname" ( dict "root" $ "service" $serviceDefinition "serviceName" $serviceName ) }}
+{{- end }}
+{{- $svcDict := deepCopy $serviceDefinition }}
+{{- $svcDict := merge $svcDict (dict "annotations" $serviceDefinition.service.annotations "labels" $serviceDefinition.service.labels) }}
+{{- include "common.metadata" ( dict "root" $ "service" $svcDict "serviceName" $serviceName ) | nindent 2 }}
+spec:
+  selector: {{- include "common.selectorLabels" ( dict "root" $ "service" $serviceDefinition "serviceName" $serviceName ) | nindent 4 }}
+  {{- with $serviceDefinition.podMonitor.endpoint }}
+  podMetricsEndpoints:
+    - {{ . | toYaml | nindent 6 }}
+  {{- end }}
+{{- end }}
+{{- end }}
+{{- end }}

tests/expected.yaml

@@ -619,3 +619,30 @@ spec:
                 name: hardcoded-service-name
                 port:
                   number: 8080
+---
+# Source: custom-pod/templates/podmonitor.yaml
+apiVersion: monitoring.coreos.com/v1
+kind: PodMonitor
+metadata:
+  name: custom-custom-pod-with-service-name
+  labels:
+    helm.sh/chart: custom-pod
+    app.kubernetes.io/version: "1.0"
+    app.kubernetes.io/managed-by: Helm
+    app.kubernetes.io/name: custom-pod
+    app.kubernetes.io/instance: custom
+    app.kubernetes.io/component: with-service-name
+    one-custom-label: hello-world
+  annotations:
+    one-custom-annotation: abc
+    two-custom-annotations: xyz
+spec:
+  selector:
+    app.kubernetes.io/name: custom-pod
+    app.kubernetes.io/instance: custom
+    app.kubernetes.io/component: with-service-name
+  podMetricsEndpoints:
+    -
+      honorLabels: true
+      interval: 10s
+      port: prometheus

tests/values.yaml

@@ -30,10 +30,16 @@ ingress:
 
 services:
   example1:
+    enabled: true
     ingress:
       enabled: true
       path: /one
-    enabled: true
+    podMonitor:
+      enabled: true
+      endpoint:
+        port: prometheus
+        interval: 10s
+        honorLabels: true
     replicaCount: 1
     nodeSelector: {}
     affinity: {}