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Lab 003: Create Namespaces in Kubernetes Cluster

Requirements​

The Nautilus DevOps team is planning to deploy some micro services on Kubernetes platform. The team has already set up a Kubernetes cluster and now they want set up some namespaces, deployments etc. Based on the current requirements, the team has shared some details as below:

Create a namespace named dev and create a POD under it; name the pod dev-nginx-pod and use nginx image with latest tag only and remember to mention tag i.e nginx:latest.

Note: The kubectl utility on jump_host has been configured to work with the kubernetes cluster.

Note

This document focuses on the implementation approach. The task statement in Requirements is preserved as the source requirement.

Prerequisites​

  • Access to the configured Kubernetes cluster from jump_host.
  • kubectl is configured and points to the correct context.
  • Use the task-specified namespace, resource names, and images exactly.

Steps​

Create the nginx.yml based on the requirements.

apiVersion: v1
kind: Namespace
metadata:
  name: dev
---
apiVersion: v1
kind: Pod
metadata:
  name: dev-nginx-pod
  namespace: dev
spec:
  containers:
    - name: nginx
      image: nginx:latest

Apply.

kubectl apply -f .

Verify.

thor@jump_host ~$ kubectl get ns
NAME                 STATUS   AGE
default              Active   5m24s
dev                  Active   90s
kube-node-lease      Active   5m25s
kube-public          Active   5m25s
kube-system          Active   5m25s
local-path-storage   Active   5m15s
thor@jump_host ~$ 
thor@jump_host ~$ kubectl get all -n dev
NAME                READY   STATUS    RESTARTS   AGE
pod/dev-nginx-pod   1/1     Running   0          97s
thor@jump_host ~$ 
thor@jump_host ~$ kubectl describe -n dev pod dev-nginx-pod | grep Image:
    Image:          nginx:latest

Verification​

  • Confirm the required pods/services/deployments/jobs are in the expected state.
  • Run kubectl get commands for the affected resource types and namespace.

Resources​