Using Microservices in Kubernetes

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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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Lab Info

Level

Intermediate

Last updated

Sep 02, 2025

Duration

30m

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.

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