Simple implementations of some of Spring Cloud services

• Each service calls config-service to get their configuration files.
• Each service register itself with Netflix Eureka.
• The gateway-service adds proxy and load balancing to greeting services registered with Eureka.
• The admin-server brings up an easy way to consult actuator services.

This project has no extra external dependencies, you just need to import as a maven project and then run in the root project:

mvn clean install

To start the project, you have two options:

The boot order is:

1. config-service
2. eureka-service
3. greeting-instance
4. gateway-service
5. admin-service

First, initialize the Swarm mode:

docker swarm init

Then create the overlay network:

docker network create -d overlay spring-cloud-network

In the first run and after a project re-build, use:

docker-compose up --build --force-recreate --scale greeting-instance=3

After that, you can just use:

docker-compose up --scale greeting-instance=3

The --scale greeting-instance=3 option will start tree instances of that service, you can choose the number you want.

Greeting service can be called through gateway-service at localport 8080

curl http://localhost:8080/greeting

Greeting service has a basic auth system:

To see the currently registered services you can navigate in your preferred browser to the address:

http://localhost:8761

Eureka portal has a basic auth system:

The admin portal will show you all the info from the exposed actuator services. In this sample they all are exposed with no security. (Never replicate this in a production scenario).

Admin portal has a basic auth system:

In your preferred browser, navigate to:

http://localhost:8500

All the services here are simple examples of its on projects, configured to work together. More services, tests, and examples will come.