Working With Kubernetes Namespaces

Kubernetes supports multiple virtual clusters backed by the same physical cluster. These virtual clusters are called namespaces.

1. Get pod details of other namespace using:

   kubectl get pods --namespace=dev

2. By below command you will get pod details of default namespace

   kubectl get pods

3. You can change default namespace by using:

   kubectl config set-context ${kubectl config current-context} --namespace=dev

4. Now for getting pod details of default you need to use

   kubectl get pods --namespace=default

5. Get all pods details across namespaces using:

   kubectl get pods --all-namespaces

6. Creating a namespace using yml definition, please refer this link:

   kubectl create -f namespace-dev.yml

7. Mentioning namespace in pod:

   kubectl create -f pod-definition.yml --namespace=dev

8. Get list of system pods using:

   kubectl get pods --namespace=kube-system

9. You can set resource limits on namespaces, here an example yml for same, please refer this link:

   kubectl create -f compute-quota.yml