kubernetes deployment维护常用命令

deployment样本文件

$ cat hello-world.yaml

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: hello-world
  namespace: dev
  labels:
    app: hello-world
spec:
  replicas: 3
  strategy:
    rollingUpdate:
      maxSurge: 1
      maxUnavailable: 1
  template:
    metadata:
      labels:
        app: hello-world
    spec:
      containers:
      - name: hello-world
        image: hello-world:v1
        imagePullPolicy: IfNotPresent

说明：
maxSurge: 1 表示滚动升级前先启动1个pod
maxUnavailable: 1 表示滚动升级时允许的最大Unavailable的pod个数，一次升级数量

maxSurge >= maxUnavailable

创建deployment

$ kubectl create -f hello-world.yaml

查看deployment

$ kubectl describe deployment hello-world -n dev

Name:                   hello-world
Namespace:              dev
CreationTimestamp:      Fri, 09 Mar 2018 10:09:15 +0800
Labels:                 app=hello-world
Annotations:            deployment.kubernetes.io/revision=1
Selector:               app=hello-world
Replicas:               3 desired | 3 updated | 3 total | 3 available | 0 unavailable
StrategyType:           RollingUpdate
MinReadySeconds:        0
RollingUpdateStrategy:  1 max unavailable, 1 max surge
Pod Template:
  Labels:  app=hello-world
  Containers:
   hello-world:
    Image:        hello-world:v1
    Port:         <none>
    Environment:  <none>
    Mounts:       <none>
  Volumes:        <none>
Conditions:
  Type           Status  Reason
  ----           ------  ------
  Available      True    MinimumReplicasAvailable
OldReplicaSets:  <none>
NewReplicaSet:   hello-world-5cc47c955f (3/3 replicas created)
Events:
  Type    Reason             Age   From                   Message
  ----    ------             ----  ----                   -------
  Normal  ScalingReplicaSet  4s    deployment-controller  Scaled up replica set hello-world-5cc47c955f to 3

升级deployment

$ kubectl set image deployment hello-world hello-world=hello-world:v2 -n dev

或者

$ kubectl edit deployment hello-world -n dev

终止升级

$ kubectl rollout pause deployment hello-world -n dev

继续升级

$ kubectl rollout resume deployment hello-world -n dev

回滚上一个版本

$ kubectl rollout unto deployment hello-world -n dev

查看deployment版本

$ kubectl rollout history deployment hello-world -n dev
deployments "hello-world"
REVISION  CHANGE-CAUSE
1         <none>
2         <none>

回滚指定版本

kubectl rollout undo deployment hello-world --to-revision=1 -n dev

查看升级部署状态

$ kubectl rollout status deployment hello-world -n dev

原文地址：http://blog.51cto.com/2759492/2084484