kube-prometheus: simplify service monitors

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

 apiVersion: monitoring.coreos.com/v1alpha1
 kind: ServiceMonitor
 metadata:
-  labels:
-    alertmanager: main
   name: alertmanager
+  labels:
+    app: alertmanager
 spec:
+  selector:
+    matchLabels:
+      alertmanager: main
+  namespaceSelector:
+    matchNames:
+    - monitoring
   endpoints:
   - port: web
-  selector:
-    matchExpressions:
-    - {key: alertmanager, operator: In, values: [main]}
+    interval: 30s

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

@@ -3,9 +3,9 @@ kind: ServiceMonitor
 metadata:
   name: kube-apiserver
   labels:
-    k8s-apps: https
+    k8s-app: apiserver
 spec:
-  jobLabel: provider
+  jobLabel: component
   selector:
     matchLabels:
       component: apiserver
@@ -15,7 +15,7 @@ spec:
     - default
   endpoints:
   - port: https
-    interval: 15s
+    interval: 30s
     scheme: https
     tlsConfig:
       caFile: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt

manifests/prometheus/prometheus-k8s-service-monitor-k8s-apps-http.yaml → manifests/prometheus/prometheus-k8s-service-monitor-kube-controller-manager.yaml

 apiVersion: monitoring.coreos.com/v1alpha1
 kind: ServiceMonitor
 metadata:
-  name: k8s-apps-http
-  namespace: monitoring
+  name: kube-controller-manager
   labels:
-    k8s-apps: http
+    k8s-app: kube-controller-manager
 spec:
   jobLabel: k8s-app
+  endpoints:
+  - port: http-metrics
+    interval: 30s
   selector:
-    matchExpressions:
-    - {key: k8s-app, operator: Exists}
-    - {key: k8s-app, operator: NotIn, values: [kubelet]}
+    matchLabels:
+      k8s-app: kube-controller-manager
   namespaceSelector:
     matchNames:
     - kube-system
-  endpoints:
-  - port: http-metrics
-    interval: 15s
-  - port: http-metrics-dnsmasq
-    interval: 15s
-  - port: http-metrics-skydns
-    interval: 15s

manifests/prometheus/prometheus-k8s-service-monitor-kube-scheduler.yaml

+apiVersion: monitoring.coreos.com/v1alpha1
+kind: ServiceMonitor
+metadata:
+  name: kube-scheduler
+  labels:
+    k8s-app: kube-scheduler
+spec:
+  jobLabel: k8s-app
+  endpoints:
+  - port: http-metrics
+    interval: 30s
+  selector:
+    matchLabels:
+      k8s-app: kube-scheduler
+  namespaceSelector:
+    matchNames:
+    - kube-system

manifests/prometheus/prometheus-k8s-service-monitor-kube-state-metrics.yaml

@@ -2,9 +2,8 @@ apiVersion: monitoring.coreos.com/v1alpha1
 kind: ServiceMonitor
 metadata:
   name: kube-state-metrics
-  namespace: monitoring
   labels:
-    k8s-apps: http
+    k8s-app: kube-state-metrics
 spec:
   jobLabel: k8s-app
   selector:
@@ -15,5 +14,5 @@ spec:
     - monitoring
   endpoints:
   - port: http-metrics
-    interval: 15s
+    interval: 30s
     honorLabels: true

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

@@ -3,16 +3,16 @@ kind: ServiceMonitor
 metadata:
   name: kubelet
   labels:
-    k8s-apps: http
+    k8s-app: kubelet
 spec:
   jobLabel: k8s-app
+  endpoints:
+  - port: http-metrics
+    interval: 30s
+    honorLabels: true
   selector:
     matchLabels:
       k8s-app: kubelet
   namespaceSelector:
     matchNames:
     - kube-system
-  endpoints:
-  - port: http-metrics
-    interval: 15s
-    honorLabels: true

manifests/prometheus/prometheus-k8s-service-monitor-node-exporter.yaml

@@ -2,9 +2,8 @@ apiVersion: monitoring.coreos.com/v1alpha1
 kind: ServiceMonitor
 metadata:
   name: node-exporter
-  namespace: monitoring
   labels:
-    k8s-apps: http
+    k8s-app: node-exporter
 spec:
   jobLabel: k8s-app
   selector:
@@ -15,4 +14,4 @@ spec:
     - monitoring
   endpoints:
   - port: http-metrics
-    interval: 15s
+    interval: 30s

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

@@ -3,10 +3,14 @@ kind: ServiceMonitor
 metadata:
   name: prometheus
   labels:
-    prometheus: k8s
+    app: prometheus
 spec:
+  selector:
+    matchLabels:
+      prometheus: k8s
+  namespaceSelector:
+    matchNames:
+    - monitoring
   endpoints:
   - port: web
-  selector:
-    matchExpressions:
-    - {key: prometheus, operator: In, values: [k8s]}
+    interval: 30s