Today, I managed to run my microservices in docker environment successfully.
Table of Contents
Build the microservices
I have written four microservices using Spring Boot. One is Eureka Server and the other three are Eureka Clients.
| Docker Tag Name | Description | Port | Source Code Path |
|---|---|---|---|
| ms-server-eureka | Spring Boot Application acting as Eureka Discovery Server. | 8001 | $MS_SRC_BASE/ms.server.eureka/ |
| ms-client-user | Spring Boot Client Application connecting to MongoDB. | 8002 | $MS_SRC_BASE/ms.client.user/ |
| ms-client-product | Spring Boot Client Application connecting to MongoDB. | 8003 | $MS_SRC_BASE/ms.client.product/ |
| ms-client-cart | Spring Boot Client Application connecting to MongoDB. | 8004 | $MS_SRC_BASE/ms.client.cart/ |
| ms-mongodb | MongoDB | 27017 | NIL |
Firstly, create Dockerfile for each of the microservice.
Here below is the example for the User Microservice.
FROM openjdk:17-ea-22
COPY target/ms.client.user-0.0.1-SNAPSHOT.jar ms.client.user-SNAPSHOT.jar
EXPOSE 8001
ENTRYPOINT ["java","-jar","/ms.client.user-SNAPSHOT.jar"]
Secondly, build each of the Spring Boot Applications and package to JAR files.
./mvnw -Dmaven.test.skip=true clean package
Thirdly, build docker image of each of the Spring Boot Applications.
*Make sure Docker Engine is running on your development host.
cd $MS_SRC_BASE/ms.server.eureka/
docker build --tag=ms-server-eureka:latest .
cd $MS_SRC_BASE/ms.client.user/
docker build --tag=ms-client-user:latest .
cd $MS_SRC_BASE/ms.client.product/
docker build --tag=ms-client-product:latest .
cd $MS_SRC_BASE/ms.client.cart/
docker build --tag=ms-client-cart:latest .
Deployment
- In order that the containers can find each other, use
--network container:[containerName]to bind to a master container. In this case, I use ms-server-eureka as the master container. - All ports are exposed by publishing the ports on the master container.
docker run --name ms-server-eureka -p 8000-8003:8000-8003 -p 27017:27017 ms-server-eureka:latest
docker run --name ms-mongodb --network container:ms-server-eureka -d mongo
docker run --name ms-client-user --network container:ms-server-eureka ms-client-user:latest
docker run --name ms-client-product --network container:ms-server-eureka ms-client-product:latest
docker run --name ms-client-cart --network container:ms-server-eureka ms-client-cart:latest
Verification
- Check the Eureka Server status by opening
http://localhost:8000/in a web browser.
- Get data from the User Microservice by opening
http://localhost:8001/user/search/findByLastName?name=Administratorin a web browser.
Top comments (2)
Great. would be great if you could have made it as a series by explaining each of the microservices as well in a post!
Great idea! This is also what I want to do in near future.