kube-prometheus: add prometheus-operator as target

manifests/prometheus-operator/prometheus-operator-service.yaml

+apiVersion: v1
+kind: Service
+metadata:
+  name: prometheus-operator
+  labels:
+    k8s-app: prometheus-operator
+spec:
+  type: ClusterIP
+  ports:
+  - name: http
+    port: 8080
+    targetPort: http
+    protocol: TCP
+  selector:
+    k8s-app: prometheus-operator

manifests/prometheus-operator/prometheus-operator.yaml

@@ -3,13 +3,13 @@ kind: Deployment
 metadata:
   name: prometheus-operator
   labels:
-    operator: prometheus
+    k8s-app: prometheus-operator
 spec:
   replicas: 1
   template:
     metadata:
       labels:
-        operator: prometheus
+        k8s-app: prometheus-operator
     spec:
       serviceAccountName: prometheus-operator
       containers:
@@ -18,6 +18,9 @@ spec:
         args:
         - "--kubelet-service=kube-system/kubelet"
         - "--config-reloader-image=quay.io/coreos/configmap-reload:v0.0.1"
+        ports:
+        - name: http
+          containerPort: 8080
         resources:
           requests:
             cpu: 100m

manifests/prometheus/prometheus-k8s-service-monitor-prometheus-operator.yaml

+apiVersion: monitoring.coreos.com/v1alpha1
+kind: ServiceMonitor
+metadata:
+  name: prometheus-operator
+  labels:
+    k8s-app: prometheus-operator
+spec:
+  endpoints:
+  - port: http
+  selector:
+    matchLabels:
+      k8s-app: prometheus-operator