Steps To Run A POD In A Selected Node In The Kubernetes

In this blog, we will show you the steps to run a POD in a Selected Node in the kubernetes environment.

REQUIREMENTS

2 Node Cluster ( 1 Master VM with 2 Nodes)
Kubernetes Components

INFRASTRUCTURE OVERVIEW

We have already installed and configured the 2 Node cluster in our demo environment.
Please check the URL https://blog.assistanz.com/steps-to-install-kubernetes-cluster-manually-using-centos-7/ for more information.

ADDING LABEL TO A NODE USING KUBECTL

Use show labels option to view the node’s labels.

kubectl get nodes --show-labels

Use the label command to set a label for a node.

Syntax: kubectl label <object type> <object name> <label values>

Example: kubectl lable node k8s-node2 type=hdd

Command executed successfully.

We can verify the label information using show labels option.

CREATING A POD IN THE SELECTED NODE

Create a new file and paste the below coding.

apiVersion: v1
kind: Pod
metadata:
name: node-pod
labels:
app: web
env: test
spec:
nodeSelector:
type: "hdd"
containers:
- name: node-cont
image: nginx

Save and close the file.

Create a new POD using the YAML file.

Command executed successfully.

Verify the pod status using wide option. We can see our new POD is assigned to node2 using the node labels.

DELETE A LABEL FROM THE NODE

Use the below command to delete a label from a node.

Syntax: kubectl label <object type> <object name> <label value>-

Example: kubectl label node k8s-node2 type-

Command executed successfully.

Verify the changes.

VIDEO

Thanks for reading this blog. We hope it was useful for you to run a POD in a selected node in the kubernetes environment.