Namespace ¶

Scenario:

Get namespace list
Create new namespace
Label a namespace
Delete a namespace

Demo:

Get list of Namespace

kubectl get namespace

Get list of Namespace with Label information.

kubectl get ns --show-labels

Create a Namespace

kubectl create namespace cka

Label the new created Namespace cka.

kubectl label ns cka cka=true

Create Nginx Deployment in Namespace cka.

kubectl create deploy nginx --image=nginx --namespace cka

Check Deployments and Pods running in namespace cka.

kubectl get deploy,pod -n cka

Result is below.

NAME                    READY   UP-TO-DATE   AVAILABLE   AGE
deployment.apps/nginx   1/1     1            1           2m14s

NAME                         READY   STATUS    RESTARTS   AGE
pod/nginx-85b98978db-bmkhf   1/1     Running   0          2m14s

Delete namespace cka. All resources in the namespaces will be gone.

kubectl delete ns cka

Tip:

Kubernetes Namespaces stuck in Terminating status.

kubectl get namespace $NAMESPACE -o json | sed -e 's/"kubernetes"//' | kubectl replace --raw "/api/v1/namespaces/$NAMESPACE/finalize" -f -