kubectl 常用命令

1. 查看镜像定义的内容

docker image inspeck 镜像名:版本

2. 查看可回滚历史

# myapp-deploy 指定哪个 deployment  
kubectl rollout history deployment myapp-deploy

3. 回滚到上一个版本

# rollout undo 回滚到上一版本的 deployment
kubectl rollout undo deployment myapp-deploy

4. 指定某个版本回滚

# --to-revision=1  指定某个版本号
kubectl rollout undo deployment myapp-deploy --to-revision=1

5. 查看deploy信息

kubectl get deploy

6. 查看 service 信息，可以看更新历史

kubectl get rs -o wide

7. 查看 指定 deploy 的详细信息

kubectl describe deploy myapp-deploy

8. 查看pods 更新状态，并实时监控状态变换

# -l 过滤指定的标签 app=myapp
# -w 实时监控状态
kubectl get pods -l app=myapp -w

9. 通过patch 更改镜像

# patch  打补丁形式更新
# -p 指定更新内容
kubectl patch deployment myapp-deploy -p '{"spec":{"template":{"spec":{"containers":{"name":{"image":"xxxxxxvvvv2"}}}}}}'

10. 通过 set 更改当前正在运行deployment的镜像

# kubectl set image deployment    固定语句
# myapp-deploy                    指定 deployment
# myapp=ikubernetes/myapp:v3      指定 pod 为 myapp的镜像改为 ikubernetes/myapp:v3
kubectl set image deployment myapp-deploy myapp=ikubernetes/myapp:v3

11. 暂停更新过程

# rollout pause 暂停更新 deployment
kubectl rollout pause deployment myapp-deploy

12. 继续更新

# rollout resume 继续更新 deployment
kubectl rollout resume deployment myapp-deploy

13. 监控更新过程

kubectl rollout status deployment myapp-deploy

14. 查看pod中有哪些标签

# --show-labels 查看pods 的标签信息
kubectl get pods --show-labels

15. 给指定的 pod 添加标签

kubectl label pods pod-demo app=zyuser

16. 查看运行中pod 的配置清单

[zyjenkins@server1 ~]$ kubectl get pods -n zy-dev ty-youlia  d859-ckr4t  -o yaml
apiVersion: v1
kind: Pod
metadata:annotations:... ...

node操作

1. 给node节点添加 label标签

[zyjenkins@server1 target]$ kubectl label nodes host1  host2 host3 host4 server_type=worker   
node/host1 labeled
node/host2 labeled
node/host3 labeled
node/host4 labeled

2. 查询出node 有server_type 标签的

[zyjenkins@server1 ~]$ kubectl get node -l server_type
NAME                                 STATUS   ROLES    AGE   VERSION
host1                                Ready    <none>   78d   v1.12.6-aliyun.1
host2                                Ready    <none>   60d   v1.12.6-aliyun.1
host3                                Ready    <none>   76d   v1.12.6-aliyun.1
host4                                Ready    <none>   98d   v1.12.6-aliyun.1