add autoscaler for kube-state-metrics

Author: chenxingyu

kubernetes/kube-state-metrics-cluster-role.yaml

@@ -5,8 +5,11 @@ metadata:
 rules:
 - apiGroups: [""]
   resources:
-  - nodes
   - pods
+  verbs: ["list", "watch", "get"]
+- apiGroups: [""]
+  resources:
+  - nodes
   - services
   - resourcequotas
   - replicationcontrollers
@@ -15,8 +18,11 @@ rules:
   verbs: ["list", "watch"]
 - apiGroups: ["extensions"]
   resources:
-  - daemonsets
   - deployments
+  verbs: ["list", "watch", "get", "update"]
+- apiGroups: ["extensions"]
+  resources:
+  - daemonsets
   - replicasets
   verbs: ["list", "watch"]
 - apiGroups: ["apps"]

kubernetes/kube-state-metrics-deployment.yaml

@@ -4,7 +4,7 @@ metadata:
   name: kube-state-metrics
   namespace: kube-system
 spec:
-  replicas: 2
+  replicas: 1
   template:
     metadata:
       labels:
@@ -30,4 +30,30 @@ spec:
           limits:
             memory: 50Mi
             cpu: 200m
-
+      - name: pod-nanny
+        image: gcr.io/google_containers/addon-resizer:1.0
+        resources:
+          limits:
+            cpu: 100m
+            memory: 30Mi
+          requests:
+            cpu: 100m
+            memory: 30Mi
+        env:
+          - name: MY_POD_NAME
+            valueFrom:
+              fieldRef:
+                fieldPath: metadata.name
+          - name: MY_POD_NAMESPACE
+            valueFrom:
+              fieldRef:
+                fieldPath: metadata.namespace
+        command:
+          - /pod_nanny
+          - --container=kube-state-metrics
+          - --cpu=100m
+          - --extra-cpu=1m
+          - --memory=30Mi
+          - --extra-memory=2Mi
+          - --threshold=5
+          - --deployment=kube-state-metrics