命令行运行 nginx

运行 deployment
$ kubectl create deployment nginx-deployment --image=nginx
deployment.apps/nginx-deployment created
扩容 deployment
$ kubectl scale deployments/nginx-deployment --replicas=2
deployment.apps/nginx-deployment scaled
查看 deployment
$ kubectl get deployments
NAME               READY   UP-TO-DATE   AVAILABLE   AGE
nginx-deployment   2/2     2            2           7m43s

查看更详细信息

$ kubectl describe deployment nginx-deployment

1590477319462

查看 replicaset
$ kubectl get rs
$ kubectl get replicaset
NAME                          DESIRED   CURRENT   READY   AGE
nginx-deployment-5969c7f455   2         2         2       9m25s
查看 pod
$ kubectl get pod
NAME                                READY   STATUS    RESTARTS   AGE
nginx-deployment-5969c7f455-dcn65   1/1     Running   0          11m
nginx-deployment-5969c7f455-grp5s   1/1     Running   0          4m16s

查看 pod 详情

$ kubectl describe pod | egrep "^Name:|Controlled"
Name:         nginx-deployment-5969c7f455-dcn65
Controlled By:  ReplicaSet/nginx-deployment-5969c7f455
Name:         nginx-deployment-5969c7f455-grp5s
Controlled By:  ReplicaSet/nginx-deployment-5969c7f455

Controlled By 指明此 Pod 是由 ReplicaSet/nginx-deployment-5969c7f455 创建的。

删除 deployment
$ kubectl delete deployment nginx-deployment
deployment.apps "nginx-deployment" deleted

组件关系总结

  1. 用户通过 kubectl 创建 Deployment（deployments/nginx-deployment）。
  2. Deployment 创建 ReplicaSet（ReplicaSet/nginx-deployment-5969c7f455）。
  3. ReplicaSet 创建 Pod（nginx-deployment-5969c7f455-dcn65 和 nginx-deployment-5969c7f455-grp5s）。

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