Create Pods in Kubernetes Cluster

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Start:         2023-03-18 00:46:23
Finished:   2023-03-18 00:50:37

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• Create Pods in Kubernetes Cluster
  • Requirements
  • Prerequisites
  • Steps
  • Verification
  • Resources

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Requirements

The Nautilus DevOps team has started practicing some pods and services deployment on Kubernetes platform as they are planning to migrate most of their applications on Kubernetes platform. Recently one of the team members has been assigned a task to create a pod as per details mentioned below:

Create a pod named pod-nginx using the image nginx 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.

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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 pod.yml for the resource definitions.

apiVersion: v1
kind: Pod
metadata:
    name: pod-nginx
    labels:
      app: nginx_app
spec:
    containers:
    - name: nginx-container
      image: nginx:latest

Apply.

kubectl apply -f pod.yml

Check the pods. Make sure they are running.

$ kubectl get pods
NAME        READY   STATUS    RESTARTS   AGE
pod-nginx   1/1     Running   0          11s 

$ kubectl logs -f pod-nginx
/docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration
/docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/
/docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh
10-listen-on-ipv6-by-default.sh: info: Getting the checksum of /etc/nginx/conf.d/default.conf
10-listen-on-ipv6-by-default.sh: info: Enabled listen on IPv6 in /etc/nginx/conf.d/default.conf
/docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh
/docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh
/docker-entrypoint.sh: Configuration complete; ready for start up
2023/03/17 16:49:45 [notice] 1#1: using the "epoll" event method
2023/03/17 16:49:45 [notice] 1#1: nginx/1.23.3
2023/03/17 16:49:45 [notice] 1#1: built by gcc 10.2.1 20210110 (Debian 10.2.1-6) 
2023/03/17 16:49:45 [notice] 1#1: OS: Linux 5.4.0-1101-gcp
2023/03/17 16:49:45 [notice] 1#1: getrlimit(RLIMIT_NOFILE): 1048576:1048576
2023/03/17 16:49:45 [notice] 1#1: start worker processes
2023/03/17 16:49:45 [notice] 1#1: start worker process 80
2023/03/17 16:49:45 [notice] 1#1: start worker process 81 

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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