KubernetesKubernetes中通过声明式对象配置的方式管理对象

编辑deployment.yaml文件&＃xff0c;内容如下&＃xff1a;

apiVersion: v1
kind: Namespace
metadata:name: dev
---
apiVersion: apps/v1
kind: Deployment
metadata:name: nginxnamespace: dev
spec:replicas: 3selector:matchLabels:run: nginxtemplate:metadata:labels:run: nginxspec:containers:- image: nginx:1.17.3name: nginxports:- containerPort: 80protocol: TCP


使用如下命令创建对象

[root&＃64;master object_manage]# kubectl apply -f deployment.yaml
namespace/dev created
deployment.apps/nginx created
[root&＃64;master object_manage]#

二、查看对象

使用如下命令即可查看创建的对象

[root&＃64;master object_manage]# kubectl get -f deployment.yaml
NAME STATUS AGE
namespace/dev Active 55sNAME READY UP-TO-DATE AVAILABLE AGE
deployment.apps/nginx 3/3 3 3 55s
[root&＃64;master object_manage]#

三、更新对象

更新deployment.yaml文件&＃xff0c;将副本数修改为1&＃xff0c;同时将nginx的镜像的tag降为1.17.1&＃xff0c;如下&＃xff1a;

apiVersion: v1
kind: Namespace
metadata:name: dev
---
apiVersion: apps/v1
kind: Deployment
metadata:name: nginxnamespace: dev
spec:replicas: 1selector:matchLabels:run: nginxtemplate:metadata:labels:run: nginxspec:containers:- image: nginx:1.17.1name: nginxports:- containerPort: 80protocol: TCP


然后使用如下命令更新

[root&＃64;master object_manage]# kubectl apply -f deployment.yaml
namespace/dev unchanged
deployment.apps/nginx configured
[root&＃64;master object_manage]#


这里注意&＃xff0c;如果yaml文件没有修改&＃xff0c;apply命令也是可以执行的&＃xff0c;只是不会做任何操作&＃xff0c;如下&＃xff1a;

[root&＃64;master object_manage]# kubectl apply -f deployment.yaml
namespace/dev unchanged
deployment.apps/nginx unchanged
[root&＃64;master object_manage]#

四、删除对象

使用如下命令即可完成对象删除

[root&＃64;master object_manage]# kubectl delete -f deployment.yaml
namespace "dev" deleted
deployment.apps "nginx" deleted
[root&＃64;master object_manage]#