cluster autoscaler addon

addons/cluster-autoscaler/README.md

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+# Cluster Autoscaler Addon
+
+```bash
+CLOUD_PROVIDER=aws
+IMAGE=gcr.io/google_containers/cluster-autoscaler:v0.3.0
+MIN_NODES=1
+MAX_NODES=5
+AWS_REGION=us-east-1
+GROUP_NAME="k8s-worker"
+SSL_CERT_PATH="/etc/ssl/certs/ca-certificates.crt" # (/etc/ssl/certs for gce)
+
+addon=cluster-autoscaler.yml
+wget -O ${addon} https://raw.githubusercontent.com/kubernetes/kops/master/addons/cluster-autoscaler/v1.4.0.yaml
+
+sed -i -e "s@{{CLOUD_PROVIDER}}@${CLOUD_PROVIDER}@g" "${addon}"
+sed -i -e "s@{{IMAGE}}@${IMAGE}@g" "${addon}"
+sed -i -e "s@{{MIN_NODES}}@${MIN_NODES}@g" "${addon}"
+sed -i -e "s@{{MAX_NODES}}@${MAX_NODES}@g" "${addon}"
+sed -i -e "s@{{GROUP_NAME}}@${GROUP_NAME}@g" "${addon}"
+sed -i -e "s@{{AWS_REGION}}@${AWS_REGION}@g" "${addon}"
+sed -i -e "s@{{SSL_CERT_PATH}}@${SSL_CERT_PATH}@g" "${addon}"
+
+kubectl apply -f ${addon}
+```

addons/cluster-autoscaler/addon.yml

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+kind: Addons
+metadata:
+  name: cluster-autoscaler
+spec:
+  addons:
+  - version: 1.4.0
+    selector:
+      k8s-addon: cluster-autoscaler.addons.k8s.io
+    manifest: v1.4.0.yaml

addons/cluster-autoscaler/v1.4.0.yaml

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+---
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: cluster-autoscaler
+  labels:
+    k8s-app: cluster-autoscaler
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      k8s-app: cluster-autoscaler
+  template:
+    metadata:
+      labels:
+        k8s-app: cluster-autoscaler
+    spec:
+        containers:
+          - image:
+            name: {{IMAGE}}
+            resources:
+              limits:
+                cpu: 100m
+                memory: 300Mi
+              requests:
+                cpu: 100m
+                memory: 300Mi
+            command:
+              - ./cluster-autoscaler
+              - --cloud-provider={{CLOUD_PROVIDER}}
+              - --nodes={{MIN_NODES}}:{{MAX_NODES}}:{{GROUP_NAME}}
+            env:
+              - name: AWS_REGION
+                value: {{AWS_REGION}}
+            volumeMounts:
+              - name: ssl-certs
+                mountPath: {{SSL_CERT_PATH}}
+                readOnly: true
+        volumes:
+          - name: ssl-certs
+            hostPath:
+              path: {{SSL_CERT_PATH}}