Deploy Lagom microservices to OpenShift

We will use the Lagom Shopping Cart example application for this tutorial. It is available for both Java and Scala, and uses a PostgreSQL database. Shopping Cart just provides a REST API, not a user interface, so we will interact with it using curl.

The following shows the build artifacts and runtime deployment architecture for Shopping Cart. The Shopping Cart example has two microservices; one that manages shopping carts, and one that tracks inventory levels. The shopping cart microservice communicates with the inventory microservice using Kafka. When a user completes the purchase, the shopping cart microservice sends a message to the inventory microservice.

Shopping Cart artifacts and deployment architecture

What’s next

Before you start this tutorial, be sure to complete the General Setup instructions. Shopping Cart tutorial procedures include:

  1. Example-specific prerequisites

  2. Downloading the example app and getting started

  3. Setting up PostgreSQL

  4. Setting up Kafka

  5. Configuring Shopping Cart

  6. Configuring an Akka Cluster

  7. Building Shopping Cart

  8. Deploying Shopping Cart

First, take care of the Example-specific prerequisites.