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# Conflicts: # cluster-autoscaler/cloudprovider/aws/ec2_instance_types.go
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| # Cluster Autoscaler on Azure | ||
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| The cluster autoscaler on Azure scales worker nodes within any specified autoscaling group. It will run as a `Deployment` in your cluster. This README will go over some of the necessary steps required to get the cluster autoscaler up and running. | ||
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| ## Kubernetes Version | ||
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| Cluster autoscaler must run on Kubernetes with Azure VMSS support ([kubernetes#43287](https://github.com/kubernetes/kubernetes/issues/43287)). It is planed in Kubernetes v1.10. | ||
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| ## Permissions | ||
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| Get azure credentials by running the following command | ||
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| ```sh | ||
| # replace <subscription-id> with yours. | ||
| az ad sp create-for-rbac --role="Contributor" --scopes="/subscriptions/<subscription-id>" --output json | ||
| ``` | ||
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| And fill the values with the result you got into the configmap | ||
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| ```yaml | ||
| apiVersion: v1 | ||
| data: | ||
| ClientID: <client-id> | ||
| ClientSecret: <client-secret> | ||
| ResourceGroup: <resource-group> | ||
| SubscriptionID: <subscription-id> | ||
| TenantID: <tenand-id> | ||
| ScaleSetName: <scale-set-name> | ||
| kind: ConfigMap | ||
| metadata: | ||
| name: cluster-autoscaler-azure | ||
| namespace: kube-system | ||
| ``` | ||
| Create the configmap by running | ||
| ```sh | ||
| kubectl create -f cluster-autoscaler-azure-configmap.yaml | ||
| ``` | ||
|
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| ## Deployment | ||
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| ```yaml | ||
| apiVersion: extensions/v1beta1 | ||
| kind: Deployment | ||
| metadata: | ||
| name: cluster-autoscaler | ||
| namespace: kube-system | ||
| labels: | ||
| app: cluster-autoscaler | ||
| spec: | ||
| replicas: 1 | ||
| selector: | ||
| matchLabels: | ||
| app: cluster-autoscaler | ||
| template: | ||
| metadata: | ||
| labels: | ||
| app: cluster-autoscaler | ||
| spec: | ||
| containers: | ||
| - image: feisky/cluster-autoscaler:dev | ||
| name: cluster-autoscaler | ||
| resources: | ||
| limits: | ||
| cpu: 100m | ||
| memory: 300Mi | ||
| requests: | ||
| cpu: 100m | ||
| memory: 300Mi | ||
| env: | ||
| - name: ARM_SUBSCRIPTION_ID | ||
| valueFrom: | ||
| configMapKeyRef: | ||
| name: cluster-autoscaler-azure | ||
| key: SubscriptionID | ||
| - name: ARM_RESOURCE_GROUP | ||
| valueFrom: | ||
| configMapKeyRef: | ||
| name: cluster-autoscaler-azure | ||
| key: ResourceGroup | ||
| - name: ARM_TENANT_ID | ||
| valueFrom: | ||
| configMapKeyRef: | ||
| name: cluster-autoscaler-azure | ||
| key: TenantID | ||
| - name: ARM_CLIENT_ID | ||
| valueFrom: | ||
| configMapKeyRef: | ||
| name: cluster-autoscaler-azure | ||
| key: ClientID | ||
| - name: ARM_CLIENT_SECRET | ||
| valueFrom: | ||
| configMapKeyRef: | ||
| name: cluster-autoscaler-azure | ||
| key: ClientSecret | ||
| - name: ARM_SCALE_SET_NAME | ||
| valueFrom: | ||
| configMapKeyRef: | ||
| name: cluster-autoscaler-azure | ||
| key: ScaleSetName | ||
| command: | ||
| - ./cluster-autoscaler | ||
| - --v=4 | ||
| - --cloud-provider=azure | ||
| - --skip-nodes-with-local-storage=false | ||
| - --nodes="1:10:$(ARM_SCALE_SET_NAME)" | ||
| volumeMounts: | ||
| - name: ssl-certs | ||
| mountPath: /etc/ssl/certs/ca-certificates.crt | ||
| readOnly: true | ||
| imagePullPolicy: "Always" | ||
| volumes: | ||
| - name: ssl-certs | ||
| hostPath: | ||
| path: "/etc/ssl/certs/ca-certificates.crt" | ||
| ``` | ||
| ## Deploy in master node | ||
| To run a CA pod in master node - CA deployment should tolerate the master `taint` and `nodeSelector` should be used to schedule the pods in master node. | ||
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| ```yaml | ||
| apiVersion: extensions/v1beta1 | ||
| kind: Deployment | ||
| metadata: | ||
| name: cluster-autoscaler | ||
| namespace: kube-system | ||
| labels: | ||
| app: cluster-autoscaler | ||
| spec: | ||
| replicas: 1 | ||
| selector: | ||
| matchLabels: | ||
| app: cluster-autoscaler | ||
| template: | ||
| metadata: | ||
| labels: | ||
| app: cluster-autoscaler | ||
| spec: | ||
| tolerations: | ||
| - effect: NoSchedule | ||
| key: node-role.kubernetes.io/master | ||
| nodeSelector: | ||
| kubernetes.io/role: master | ||
| containers: | ||
| - image: feisky/cluster-autoscaler:dev | ||
| name: cluster-autoscaler | ||
| resources: | ||
| limits: | ||
| cpu: 100m | ||
| memory: 300Mi | ||
| requests: | ||
| cpu: 100m | ||
| memory: 300Mi | ||
| env: | ||
| - name: ARM_SUBSCRIPTION_ID | ||
| valueFrom: | ||
| configMapKeyRef: | ||
| name: cluster-autoscaler-azure | ||
| key: SubscriptionID | ||
| - name: ARM_RESOURCE_GROUP | ||
| valueFrom: | ||
| configMapKeyRef: | ||
| name: cluster-autoscaler-azure | ||
| key: ResourceGroup | ||
| - name: ARM_TENANT_ID | ||
| valueFrom: | ||
| configMapKeyRef: | ||
| name: cluster-autoscaler-azure | ||
| key: TenantID | ||
| - name: ARM_CLIENT_ID | ||
| valueFrom: | ||
| configMapKeyRef: | ||
| name: cluster-autoscaler-azure | ||
| key: ClientID | ||
| - name: ARM_CLIENT_SECRET | ||
| valueFrom: | ||
| configMapKeyRef: | ||
| name: cluster-autoscaler-azure | ||
| key: ClientSecret | ||
| - name: ARM_SCALE_SET_NAME | ||
| valueFrom: | ||
| configMapKeyRef: | ||
| name: cluster-autoscaler-azure | ||
| key: ScaleSetName | ||
| command: | ||
| - ./cluster-autoscaler | ||
| - --v=4 | ||
| - --cloud-provider=azure | ||
| - --skip-nodes-with-local-storage=false | ||
| - --nodes="1:10:$(ARM_SCALE_SET_NAME)" | ||
| volumeMounts: | ||
| - name: ssl-certs | ||
| mountPath: /etc/ssl/certs/ca-certificates.crt | ||
| readOnly: true | ||
| imagePullPolicy: "Always" | ||
| volumes: | ||
| - name: ssl-certs | ||
| hostPath: | ||
| path: "/etc/ssl/certs/ca-certificates.crt" | ||
| ``` |
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