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Deploying and Configuring Apps in Kubernetes

Kubernetes is a great tool for running applications. In this lab, you will have a chance to get hands-on with the process of deploying and configuring Kubernetes applications all the way from code to K8s. You will create a Git repository for your code, build a container image for the application using Docker, and run and configure the application in a Kubernetes cluster.

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Path Info

Level

Intermediate

Duration

30m

Published

Sep 10, 2021

Challenge

Create a Codebase Using Git

Clone the application GitHub repository to the lab server under /home/cloud_user.

The repository is located at https://github.com/linuxacademy/content-k8sapps-is-it-pirate-day.

Optionally, you can create your own fork in GitHub (requires a GitHub account) and clone that instead.
Challenge

Build a Docker Image for the App with All Needed Dependencies

The source code already includes a Dockerfile, but it is not configured to include the necessary serve package that will be used to serve the static app content.

Edit the Dockerfile to run the command yarn global add serve during the image build process in order to install this package within the resulting image.

Then, build a Docker image for the app called <YOUR_DOCKER_HUB_USERNAME>/pirate-day:0.0.1. Push the image to Docker Hub.
Challenge

Deploy the Application to Kubernetes with the Necessary Config
Create a ConfigMap called pirate-config with the following data:
```
data:
  .env: |
    REACT_APP_PIRATE_MESSAGE='No!'
```
Feel free to customize the message value if you wish.

Create a Pod called pirate-day to run the container image for the app.
- Attach the label app=pirate-day to the Pod.
- Mount the pirate-config ConfigMap data to a file within the container at /usr/src/app/.env. This should make the app display the message defined in the ConfigMap data.
There is a pre-existing Service that will allow you to access the app for testing. Using the Public IP address of the K8s Server, you should be able to access the app in a browser at http://<K8S_SERVER_PUBLIC_IP>:30080 for testing.

Author

A Cloud Guru

The Cloud Content team comprises subject matter experts hyper focused on services offered by the leading cloud vendors (AWS, GCP, and Azure), as well as cloud-related technologies such as Linux and DevOps. The team is thrilled to share their knowledge to help you build modern tech solutions from the ground up, secure and optimize your environments, and so much more!

What's a lab?

Hands-on Labs are real environments created by industry experts to help you learn. These environments help you gain knowledge and experience, practice without compromising your system, test without risk, destroy without fear, and let you learn from your mistakes. Hands-on Labs: practice your skills before delivering in the real world.