Uage:   kubectl create -f filename.yaml
        kubectl create resourece [options]
Man:    根据清单文件或者指定的资源参数创建资源

[root@hdss7-21 ~]# kubectl create namespace app     # 创建名称空间
[root@hdss7-21 ~]# kubectl get ns app
NAME   STATUS   AGE
app    Active   10s
[root@hdss7-21 ~]# kubectl create deployment app-deploy --image=harbor.od.com/public/nginx:latest -n app # 创建deployment
[root@hdss7-21 ~]# kubectl get all -n app
NAME                             READY   STATUS    RESTARTS   AGE
pod/app-deploy-5b5649fc4-plbxg   1/1     Running   0          13s
NAME                         READY   UP-TO-DATE   AVAILABLE   AGE
deployment.apps/app-deploy   1/1     1            1           13s
NAME                                   DESIRED   CURRENT   READY   AGE
replicaset.apps/app-deploy-5b5649fc4   1         1         1       13s