如果在Kubernetes中将MaxUnavailable设置为0，则不会替换Pod

我想要我的pod的回滚部署。我正在set ImageCI环境中更新我的pod 。当我将Deployment / web文件中的maxUnavailable设置为1时，我会停机。但是当我将maxUnavailable设置为0时，pod不会被替换，容器/ app也不会重新启动。

此外，我在Kubernetes集群中有一个节点，这是它的信息

Allocated resources:
  (Total limits may be over 100 percent, i.e., overcommitted.)
  CPU Requests  CPU Limits  Memory Requests  Memory Limits
  ------------  ----------  ---------------  -------------
  881m (93%)    396m (42%)  909712Ki (33%)   1524112Ki (56%)
Events:         <none>

这是完整的YAML文件。我确实准备好了探针套装。

        apiVersion: extensions/v1beta1
        kind: Deployment
        metadata:
          annotations:
            deployment.kubernetes.io/revision: "10"
            kompose.cmd: C:\ProgramData\chocolatey\lib\kubernetes-kompose\tools\kompose.exe
              convert
            kompose.version: 1.14.0 (fa706f2)
            kubectl.kubernetes.io/last-applied-configuration: |
              {"apiVersion":"extensions/v1beta1","kind":"Deployment","metadata":{"annotations":{"kompose.cmd":"C:\\ProgramData\\chocolatey\\lib\\kubernetes-kompose\\tools\\kompose.exe convert","kompose.version":"1.14.0 (fa706f2)"},"creationTimestamp":null,"labels":{"io.kompose.service":"dev-web"},"name":"dev-web","namespace":"default"},"spec":{"replicas":1,"strategy":{},"template":{"metadata":{"labels":{"io.kompose.service":"dev-web"}},"spec":{"containers":[{"env":[{"name":"JWT_KEY","value":"ABCD"},{"name":"PORT","value":"2000"},{"name":"GOOGLE_APPLICATION_CREDENTIALS","value":"serviceaccount/quick-pay.json"},{"name":"mongoCon","value":"mongodb://quickpayadmin:quickpay1234@ds121343.mlab.com:21343/quick-pay-db"},{"name":"PGHost","value":"173.255.206.177"},{"name":"PGUser","value":"postgres"},{"name":"PGDatabase","value":"quickpay"},{"name":"PGPassword","value":"z33shan"},{"name":"PGPort","value":"5432"}],"image":"gcr.io/quick-pay-208307/quickpay-dev-node:latest","imagePullPolicy":"Always","name":"dev-web-container","ports":[{"containerPort":2000}],"readinessProbe":{"failureThreshold":3,"httpGet":{"path":"/","port":2000,"scheme":"HTTP"},"initialDelaySeconds":5,"periodSeconds":5,"successThreshold":1,"timeoutSeconds":1},"resources":{"requests":{"cpu":"20m"}}}]}}}}
          creationTimestamp: 2018-12-24T12:13:48Z
          generation: 12
          labels:
            io.kompose.service: dev-web
          name: dev-web
          namespace: default
          resourceVersion: "9631122"
          selfLink: /apis/extensions/v1beta1/namespaces/default/deployments/web
          uid: 5e66f7b3-0775-11e9-9653-42010a80019d
        spec:
          progressDeadlineSeconds: 600
          replicas: 2
          revisionHistoryLimit: 10
          selector:
            matchLabels:
              io.kompose.service: web
          strategy:
            rollingUpdate:
              maxSurge: 1
              maxUnavailable: 0
            type: RollingUpdate
          template:
            metadata:
              creationTimestamp: null
              labels:
                io.kompose.service: web
            spec:
              containers:
              - env:
                - name: PORT
                  value: "2000"

                image: gcr.io/myimagepath/web-node
                imagePullPolicy: Always
                name: web-container
                ports:
                - containerPort: 2000
                  protocol: TCP
                readinessProbe:
                  failureThreshold: 10
                  httpGet:
                    path: /
                    port: 2000
                    scheme: HTTP
                  initialDelaySeconds: 10
                  periodSeconds: 10
                  successThreshold: 1
                  timeoutSeconds: 10
                resources:
                  requests:
                    cpu: 10m
                terminationMessagePath: /dev/termination-log
                terminationMessagePolicy: File
              dnsPolicy: ClusterFirst
              restartPolicy: Always
              schedulerName: default-scheduler
              securityContext: {}
              terminationGracePeriodSeconds: 30
        status:
          availableReplicas: 2
          conditions:
          - lastTransitionTime: 2019-01-03T05:49:46Z
            lastUpdateTime: 2019-01-03T05:49:46Z
            message: Deployment has minimum availability.
            reason: MinimumReplicasAvailable
            status: "True"
            type: Available
          - lastTransitionTime: 2018-12-24T12:13:48Z
            lastUpdateTime: 2019-01-03T06:04:24Z
            message: ReplicaSet "dev-web-7bd498fc74" has successfully progressed.
            reason: NewReplicaSetAvailable
            status: "True"
            type: Progressing
          observedGeneration: 12
          readyReplicas: 2
          replicas: 2
          updatedReplicas: 2

我试过1副本，它仍然无法正常工作。