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乱读天书，不求甚解

Kubernetes 02.50 Deployment

2023-05-17 02:21:58 40 0 0

admin

> APIresource: Deployment

# 列子
```yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    tag: deployment-tag
  name: deployment-name
spec:
  replicas: 10
  strategy:    
    type: RollingUpdate   #也可以是Recreate,杀死所有容器后再启动
    rollingUpdate:        #只有在RollingUpdate的时候需要
      maxSurge: 100%      #超过pod 期望副本的最大值，可以是百分比或者数字
      maxUnavailable: 0   #不可用容器的最大值，可以百分比或者数字
  selector:
    matchLabels:
      tag: pod-tag    
  template: # pod info
    metadata:
      labels:
        tag: pod-tag
    spec:
      containers:
        - image: centos:latest
          name: my-pod-container
          command: ['/bin/sleep','86400']
```
```
# 撤除这个deployment
kubectl delete deployment deployment-name
```

# 一些理解
deployment 包装了replicaSet（RS)， RS包装了pod       
RS 负责pod 的扩容 缩容， deployment 负责版本升级会滚       
```
kubectl get deployment
kubectl get rs
kubectl get pod

#列出历史版本
kubectl rollout history deployment/deployment-name
#查看某一版本
kubectl rollout history deployment/deployment-name --revision=2
#回滚上一版本
kubectl rollout undo deployment/deployment-name
#回滚到指定版本
kubectl rollout undo deployment/deployment-name --to-revision=3

#暂停某一deployment的部署（修改deployment 不触发部署，用在大量修改的时候）
kubectl rollout pause deployment/deployment-name
#修改deployment 镜像
kubectl set image deployment/deployment-name container_name=new_image

#扩容缩容
kubectl scale deployment deployment-name --replicas 5
```

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