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. Know more

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://blog.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: v1kind: Namespacemetadata: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.