向部署添加一些标签？

Question

kubectl run monnginx --image nginx --labels "env=prod,group=front"
kubectl run monnginx2 --image nginx --labels "env=dev,group=front"
kubectl run monnginx3 --image nginx --labels "env=prod,group=back"

root@kubmaster:# kubectl get deployments
NAME            READY        UP-TO-DATE AVAILABLE      AGE
monnginx         1/1             1          1          46s
monnginx2        1/1             1          1          22s
monnginx3        1/1             1          1          10s
      

root@kubmaster:# kubectl get deployments --show-labels
NAME            READY        UP-TO-DATE AVAILABLE      AGE   LABELS
monnginx         1/1             1          1          46s   env=prod,group=front
monnginx2        1/1             1          1          22s   env=dev,group=front 
monnginx3        1/1             1          1          10s   env=prod,group=back
      

root@kubermaster:~ kubectl run mynginx --image nginx --labels "env=prod,group=front"
pod/mynginx created

root@kubermaster:~ kubectl run mynginx2 --image nginx --labels "env=dev,group=front"
pod/mynginx2 created

root@kubermaster:~ kubectl run mynginx3 --image nginx --labels "env=dev,group=back"
pod/mynginx3 created

No resources found in default namespace.

NAME       READY   STATUS    RESTARTS   AGE     LABELS
mynginx    1/1     Running   0          2m39s   env=prod,group=front
mynginx2   1/1     Running   0          2m32s   env=dev,group=front
mynginx3   1/1     Running   0          2m25s   env=dev,group=back

Error: unknown flag: --labels

有人来解释为什么我有这个错误，怎么贴标签？

多谢！

Answer 1

因为$kubectl create deployment不支持--labels标志。但是可以使用$kubectl label向部署添加标签。

例子：

# Update deployment 'my-deployment' with the label 'unhealthy' and the value 'true'.
$ kubectl label deployment my-deployment unhealthy=true
  
# Update deployment 'my-deployment' with the label 'status' and the value 'unhealthy', overwriting any existing value.
$ kubectl label --overwrite deployment my-deployment status=unhealthy

它也适用于其他Kubernetes对象。