自学k8s-k8s中对资源命名时注意不能使用下划线

错误样例

[root@kubemaster ~]# cat cw_test.yaml 
apiVersion: v1
kind: Pod
metadata:
  name: pod_demo_cw
  namespace: default
  labels:
    app: ngix_test_pod
spec:
  containers:
    - name: ngix_test_cw
      image: 10.37.218.29:5000/suning/wildfly_oraclejdk1.7_110:20181220   

执行的过程中，提示如下错误：

[root@kubemaster ~]# kubectl create -f ./cw_test.yaml 
The Pod "pod_demo_cw" is invalid: 
* metadata.name: Invalid value: "pod_demo_cw": a DNS-1123 subdomain must consist of lower case alphanumeric characters, '-' or '.', and must start and end with an alphanumeric character (e.g. 'example.com', regex used for validation is '[a-z0-9]([-a-z0-9]*[a-z0-9])?(.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*')
* spec.containers[0].name: Invalid value: "ngix_test_cw": a DNS-1123 label must consist of lower case alphanumeric characters or '-', and must start and end with an alphanumeric character (e.g. 'my-name',  or '123-abc', regex used for validation is '[a-z0-9]([-a-z0-9]*[a-z0-9])?')　

修改成中划线

apiVersion: v1
kind: Pod
metadata:
  name: pod-demo-cw
  namespace: default
  labels:
    app: ngix-test-pod
spec:
  containers:
    - name: ngix-test-cw
      image: 10.37.218.29:5000/suning/wildfly_oraclejdk1.7_110:20181220

验证

[root@kubemaster ~]# kubectl get pod
NAME                            READY   STATUS    RESTARTS   AGE
pod-demo-cw                     1/1     Running   0          7s
redhat-nginx-59fc448665-9bqmr   1/1     Running   0          21d
redhat-nginx-59fc448665-fntgt   1/1     Running   0          28d
redhat-nginx-59fc448665-sxt64   1/1     Running   0          21d
[root@kubemaster ~]# vim cw_test.yaml +3
[root@kubemaster ~]# kubectl get pod pod-demo-cw
NAME          READY   STATUS    RESTARTS   AGE
pod-demo-cw   1/1     Running   0          3m36s
[root@kubemaster ~]#