Steps to create Custom Namespace in the Kubernetes

In this blog, We will show you the steps to create Custom Namespace in the Kubernetes Environment.

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REQUIREMENTS

• 2 Node Cluster ( 1 Master VM with 2 Nodes)

• Kubernetes Components

INFRASTRUCTURE OVERVIEW

• We have already installed and configured the 2 Node clusters in our demo environment.

• Please check the URL https://www.assistanz.com/steps-to-install-kubernetes-cluster-manually-using-centos-7/ for more information.

CREATE A CUSTOM NAMESPACE THROUGH KUBECTL

• Log in to the master server through putty.

• Use this command to list all the available namespaces in your environment.

kubectl get namespaces

• To create a namespace, use kubectl create command.

Syntax: kubectl create namespace

Example: kubectl create namespace aznamespace

• Command executed successfully.

• Verify the new namespace.

CREATE A CUSTOM NAMESPACE THROUGH YAML

• Create a new file and add the below coding.

api Version: v1
kind: Namespace
metadata:
name: custom-namespace

• Save and close the file.

• Use the below command to create a namespace using YAML file.

kubectl apply -f ns.yml

• Command executed successfully.

• Verify the new custom namespace.

CREATE A NEW POD IN CUSTOM NAMESPACE

• Use the kubectl command to create a POD

Syntax: kubectl run --image= --port= --generator=run-pod/v1 -n

Example: kubectl run ns-pod --image=nginx --port=80 --generator=run-pod/v1 -n aznamespace

• Command executed successfully.

• Verify the pod details using the below command.

Syntax: kubecl get pods --namespace

Example: kubectl get pods --namespace aznamespace

Note: Kubernetes will always list the pods from the default namespace. you need to specify the namespace name to display the objects in it.

DELETING THE NAMESPACE

• To delete all the pods in a namespace.

Syntax: kubectl delete pods --all --namespace

Example: kubectl delete pods --all --namespace aznamespace

• Verify the POD availability in your custom namespace.

• To delete a namespace.

Syntax: kubectl delete namespace

Example: kubectl delete namespace aznamespace

• Verify the available namespaces in your environment.

EXTERNAL LINKS

https://kubernetes.io/docs/concepts/overview/working-with-objects/namespaces/

VIDEO

Thanks for reading this blog. We hope it was useful for you to learn about custom namespaces in Kubernetes.