2017-06-15 109 views
0

我有一個部署運行:Kubernetes - 更新部署配置文件使用命令行

# kubectl get deployments 
NAME     DESIRED CURRENT UP-TO-DATE AVAILABLE AGE 
kubernetes-dashboard 4   4   4   4   131d 

我可以使用查看當前部署的配置:

# kubectl get deployments kubernetes-dashboard -o yaml 
apiVersion: extensions/v1beta1 
kind: Deployment 
metadata: 
    annotations: 
    deployment.kubernetes.io/revision: "2" 
    creationTimestamp: 2017-02-03T16:04:04Z 
    generation: 5 
    labels: 
    app: kubernetes-dashboard 
    name: kubernetes-dashboard 
    namespace: default 
    resourceVersion: "33197158" 
    selfLink: /apis/extensions/v1beta1/namespaces/default/deployments/kubernetes-dashboard 
    uid: 627d92b2-ea2a-11e6-a152-0050569b714e 
spec: 
    replicas: 4 
    selector: 
    matchLabels: 
     app: kubernetes-dashboard 
    strategy: 
    rollingUpdate: 
     maxSurge: 1 
     maxUnavailable: 1 
    type: RollingUpdate 
    template: 
    metadata: 
     annotations: 
     scheduler.alpha.kubernetes.io/tolerations: | 
      [ 
      { 
       "key": "dedicated", 
       "operator": "Equal", 
       "value": "master", 
       "effect": "NoSchedule" 
      } 
      ] 
     creationTimestamp: null 
     labels: 
     app: kubernetes-dashboard 
    spec: 
     containers: 
     - args: 
     - --apiserver-host=http://172.29.219.6:8080 
     image: gcr.io/google_containers/kubernetes-dashboard-amd64:v1.5.0 
     imagePullPolicy: Always 
     livenessProbe: 
      failureThreshold: 3 
      httpGet: 
      path:/
      port: 9090 
      scheme: HTTP 
      initialDelaySeconds: 30 
      periodSeconds: 10 
      successThreshold: 1 
      timeoutSeconds: 30 
     name: kubernetes-dashboard 
     ports: 
     - containerPort: 9090 
      protocol: TCP 
     resources: {} 
     terminationMessagePath: /dev/termination-log 
     dnsPolicy: ClusterFirst 
     restartPolicy: Always 
     securityContext: {} 
     terminationGracePeriodSeconds: 30 
status: 
    availableReplicas: 4 
    observedGeneration: 5 
    replicas: 4 
    updatedReplicas: 4 

現在我想在飛行中編輯replicas: 4。我知道一種方法是:

kubectl edit deployment kubernetes-dashboard 

但上述方法打開一個文件,然後我需要手動更新。這對我來說成了一個問題,因爲我想用諸如腳本或Ansible之類的外部工具自動編輯這些部署。

我希望用這樣的:

kubectl set replicas deployment/kubernetes-dashboard replicas=2 

但是好像不支持這樣的命令。 看起來像這樣的命令僅支持image標記。

有什麼辦法可以更新副本或任何其他屬性,如果部署,但只是發出命令(不涉及任何編輯器)?

回答

1

您可以使用此命令部署實現這一點:在docs

kubectl scale deployment my-deployment --replicas 4

更多信息。

一個更通用的解決這個問題,如果你正好想換一條不同配置的,就是用:

kubectl patch deployment my-deployment -p '{"spec": {"replicas": 4}}'

這可以用來申請任意的部分配置更新任何資源。 Docs