3.2 Docker Environment

Setting up your local docker environment for this lab.

Environment Setup

With completing this section the environment is configured. However, in the next few steps we will build the order microservice and its container. After this section you will not be able to start the environment as this container is still missing. You will be able to start it later.

Changes to the docker-compose file

To split the monolith in two microservices we need to change our docker-compose.yaml file.

Monolith Split

Microservice container specification

First we deleted the application and application-db specification which belonged to our monolith. Then we created a specification for the two microservices order and stock.

As we are building the order service by ourselves we reference a local container image. The stock service uses a pre-built image from the quay.io/acend registry.

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  order:
    image: microservices-lab-rest-order:latest
    hostname: order
    container_name: rest-order
    ports:
      - 8080:8080
    networks:
      - rest
    depends_on:
      - order-db
    environment:
      - QUARKUS_HTTP_PORT=8080
      - QUARKUS_DATASOURCE_JDBC_URL=jdbc:tracing:postgresql://order-db:5432/admin
      - APPLICATION_ARTICLESTOCK_API_URL=http://stock:8080/

  stock:
    image: quay.io/acend/microservices-lab-rest-stock:latest
    hostname: stock
    container_name: rest-stock
    ports:
      - 8081:8080
    networks:
      - rest
    depends_on:
      - stock-db
    environment:
      - QUARKUS_HTTP_PORT=8080
      - QUARKUS_DATASOURCE_JDBC_URL=jdbc:tracing:postgresql://stock-db:5432/admin

As both microservices need their own postgres database we added two databases to our docker-compose.yaml.

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  order-db:
    image: docker.io/postgres:13
    hostname: order-db
    container_name: rest-order-db
    volumes:
      - order-db-data:/var/lib/postgresql/data/
    networks:
      - rest
    environment:
      - POSTGRES_USER=admin
      - POSTGRES_PASSWORD=1234
    ports:
      - 5432:5432

  stock-db:
    image: docker.io/postgres:13
    hostname: stock-db
    container_name: rest-stock-db
    volumes:
      - stock-db-data:/var/lib/postgresql/data/
    networks:
      - rest
    environment:
      - POSTGRES_USER=admin
      - POSTGRES_PASSWORD=1234
    ports:
      - 5433:5432

Task 3.2.1 - Inspecting the docker environment

Have a look at the /code/rest/docker folder and get familiar with the docker environment specified in docker-compose.yaml.

Last modified February 12, 2024: fix debezium lab version (9e6013e)