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Welcome to Spring Microservices in Action, Chapter 10. Chapter 10 is the end of the book and demonstrates how to create a build and deployment pipeline. We walkthrough how to build this pipeline and then deploy all of the services to Amazon's Elastic Container Service (ECS).

By the time you are done reading this chapter you will have built and/or deployed:

  1. A Spring Cloud Config server that is deployed as Docker container and can manage a services configuration information using a file system or GitHub-based repository.
  2. A Eureka server running as a Spring-Cloud based service. This service will allow multiple service instances to register with it. Clients that need to call a service will use Eureka to lookup the physical location of the target service.
  3. A Zuul API Gateway. All of our microservices can be routed through the gateway and have pre, response and post policies enforced on the calls.
  4. A organization service that will manage organization data used within EagleEye.
  5. A new version of the organization service. This service is used to demonstrate how to use the Zuul API gateway to route to different versions of a service.
  6. A special routes services that the the API gateway will call to determine whether or not it should route a user's service call to a different service then the one they were originally calling. This service is used in conjunction with the orgservice-new service to determine whether a call to the organization service gets routed to an old version of the organization service vs. a new version of the service.
  7. A licensing service that will manage licensing data used within EagleEye.
  8. A Kafka message bus to transport messages between services.

Our PostgreSQL database and Redis service have now been moved to Amazon services.

Software needed

  1. [Apache Maven] ( I used version 3.3.9 of the Maven. I chose Maven because, while other build tools like Gradle are extremely popular, Maven is still the pre-dominate build tool in use in the Java ecosystem. All of the code examples in this book have been compiled with Java version 1.8.
  2. [Docker] ( I built the code examples in this book using Docker V1.12 and above. I am taking advantage of the embedded DNS server in Docker that came out in release V1.11. New Docker releases are constantly coming out so it's release version you are using may change on a regular basis.
  3. [Git Client] ( All of the source code for this book is stored in a GitHub repository. For the book, I used version 2.8.4 of the git client.

Building the Docker Images for Chapter 10

To build the code examples for Chapter 10 as a docker image, open a command-line window change to the directory where you have downloaded the Chapter 9 source code.

Run the following maven command. This command will execute the Spotify docker plugin defined in the pom.xml file.

mvn clean package docker:build

If everything builds successfully you should see a message indicating that the build was successful.

Running the services in Chapter 10

Now we are going to use docker-compose to start the actual image. To start the docker image, change to the directory containing your chapter 10 source code. Issue the following docker-compose command:

docker-compose -f docker/common/docker-compose.yml up

If everything starts correctly you should see a bunch of Spring Boot information fly by on standard out. At this point all of the services needed for the chapter code examples will be running.


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