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Chendrayan Venkatesan

MVP | MCTS | MCP | ITIL

Chendrayan Venkatesan

2-Minute Read

PODS

Introduction

In my previous blog, we described the pod deployment and exposing the app to the internet. Now, let me walk through the steps to release a new version of the application. We have two application versions in the Docker repository and they are listed below

  1. Version 1
  2. Version 2

Steps (High Level)

  1. Build an HTML static web application – Content is of your choice
  2. Dockerize the application
  3. Tag and publish to the Docker hub
  4. Deploy the containerized application in the AKS
  5. Release a newer version of the application in the AKS

HTML Code & Dockerfile Content

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>AKS</title>
    <link rel="stylesheet" href="https://cdn.metroui.org.ua/v4.3.2/css/metro-all.min.css">
    <link href='https://fonts.googleapis.com/css?family=Montserrat' rel='stylesheet'>
    <style>
        body {
            font-family: 'Montserrat';
            font-size: 22px;
        }
    </style>
</head>

<body>
    <hr>
    <h3 style="text-align: center;">AKS | NGINX | VERSION </h3>
    <hr>
    <!-- <p style="text-align: center;">Application Version 1.0.0 | Docker tag 1.0.0</p>
    <div data-role="cube" data-cells="10" data-margin="2"></div> -->
    
    <p style="text-align: center;">Application Version 2.0.0 | Docker tag 2.0.0</p>
    <div data-role="cube" data-color="bg-cyan bd-darkCyan" data-flash-color="#aa00ff"></div>
    <script src="https://cdn.metroui.org.ua/v4/js/metro.min.js"></script>
</body>

</html>
FROM nginx

COPY home.html /usr/share/nginx/html

Build & Tag (Version 1.0)

PS C:\Projects\Collabrains.Cloud> docker build -t chenv/collabrains-cloud:1.0.0 .

Push to Docker Hub - V1

PS C:\Projects\Collabrains.Cloud> docker push chenv/collabrains-cloud:1.0.0

Build & Tag (Version 2.0)

PS C:\Projects\Collabrains.Cloud> docker build -t chenv/collabrains-cloud:2.0.0 .

Push to Docker Hub - V2

PS C:\Projects\Collabrains.Cloud> docker push chenv/collabrains-cloud:2.0.0

Create Deployment

PS C:\Projects\Collabrains.Cloud> kubectl create deployment collabrains-cloud --image=chenv/collabrains-cloud:1.0.0

Expose

PS C:\Projects\Collabrains.Cloud> kubectl expose deployment collabrains-cloud --type=LoadBalancer --port=80 --target-port=80 --name=collabrains-cloud-service

New Version (2.0.0)

PS C:\Projects\Collabrains.Cloud> kubectl set image deployment/collabrains-cloud collabrains-cloud=chenv/collabrains-cloud:2.0.0 --record=true

Summary

Awesome, now that we know the basics of Pods, updating deployments. There are lot more coming up in future, please feel free to subscribe to my YouTube channel - iAutomate and follow me on twitter ChendrayanV

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