Does this command display all the pods in the cluster that are labeled as ‘env: development’?

Does this command display all the pods in the cluster that are labeled as ‘env: development’?

Solution: ‘kubectl get pods –all-namespaces -I env=development’
A . Yes
B . No

View Answer

Answer: B

Explanation:

The command ‘kubectl get pods –all-namespaces -I env=development’ does not display all the pods in the cluster that are labeled as ‘env: development’. The reason is that the flag -I is not a valid option for kubectl get pods. The correct flag to use is –selector or -l, which allows you to filter pods by labels1. Labels are key-value pairs that can be attached to Kubernetes objects to identify, group, or select them2. For example, to label a pod with env=development, one can run:

kubectl label pods my-pod env=development

To display all the pods that have the label env=development, one can run:

kubectl get pods –selector env=development

or

kubectl get pods -l env=development

The –all-namespaces flag can be used to list pods across all namespaces3. Therefore, the correct command to display all the pods in the cluster that are labeled as ‘env: development’ is:

kubectl get pods –all-namespaces –selector env=development

or

kubectl get pods –all-namespaces -l env=development

Reference: kubectl Cheat Sheet | Kubernetes

Labels and Selectors | Kubernetes

kubectl get | Kubernetes