Lab
A Cloud Guru

Using Microservices in Kubernetes

One of the greatest strengths of Kubernetes is how it simplifies networking from the perspective of an application designer. In this lab, you will have the chance to explore microservice design in Kubernetes by wiring an application to its backing services. You will also be able to smoothly perform a rolling update on this application using the architecture you have built.

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Path Info

Level

Intermediate

Duration

30m

Published

Sep 10, 2021

Challenge

Implement the Backing Service

The application relies on a backing web service. The Pod(s) for the backing service are already running in the cluster, and they have the label app=pirate-day-backend. The backing service application listens on port 3000. Create a NodePort Service called pirate-day-backend-svc for this backing service with the nodePort 30081.
Challenge

Set Up the Kubernetes Deployment

Create a Deployment called pirate-day-dep to run the app with 3 replicas. Include the label app=pirate-day-frontend on each Pod. An existing NodePort Service will allow access to the app using this label at http://<K8s_SERVER_PUBLIC_IP>:30080.

Use the image linuxacademycontent/pirate-day:0.0.2.

A ConfigMap already exists in the cluster called pirate-config. This ConfigMap contains a top-level key called .env that represents the configuration file for the app. Mount this config data as a file to the containers at /usr/src/app/.env. This will ensure the frontend points to the correct URL for the backing service.
Challenge

Perform a Rolling Update

Perform a rolling update to update the app to a new version. Change the Deployment to use the image linuxacademycontent/pirate-day:0.0.3.

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.