feat(kubelet): Add metrics

manifests/kubelet-servicemonitor.yaml

@@ -0,0 +1,12 @@
+apiVersion: monitoring.coreos.com/v1
+kind: ServiceMonitor
+metadata:
+  name: kubelet-metrics
+  namespace: kube-system
+spec:
+  selector:
+    matchLabels:
+      app.kubernetes.io/name: kubelet
+  endpoints:
+    - port: http-metrics
+      path: /metrics

manifests/kustomization.yaml

@@ -11,3 +11,4 @@ resources:
   - grafana
   - node-exporter
   - kube-state-metrics
+  - kubelet-servicemonitor.yaml