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How to achieve service registration and discovery in Eureka, many novices are not very clear about this. In order to help you solve this problem, the following editor will explain it in detail. People with this need can come and learn. I hope you can get something.

Initialize the project from Spring Initializr

Visit http://start.spring.io/ to initialize the project. We named the project micro-weather-eureka-server.

Change configuration

Follow the guidelines of the following two blogs to configure and speed up the construction of the project.

Gradle Wrapper refers to the local release package: https://waylau.com/change-gradle-wrapper-distribution-url-to-local-file/

Use Maven Mirror: https://waylau.com/use-maven-mirrors/

Enable Eureka Server

To enable EurekaServer, add the @ EnableEurekaServer annotation to Application.

@ SpringBootApplication@EnableEurekaServerpublic class Application {public static void main (String [] args) {SpringApplication.run (Application.class, args);}} modify project configuration

Modify application.properties to add the following configuration.

Server.port: 8761eureka.instance.hostname: localhosteureka.client.registerWithEureka: falseeureka.client.fetchRegistry: falseeureka.client.serviceUrl.defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/

Where:

Server.port: indicates the port number on which the application is started

Eureka.instance.hostname: the host name of the application

Eureka.client.registerWithEureka: a value of false means that it is only a server, not a client

Eureka.client.fetchRegistry: a value of false means you don't need to register yourself

Eureka.client.serviceUrl.defaultZone: indicates the URL of the application

Start Eureka Server

Start the application, visit http://localhost:8761/, and you can see the UI management interface that comes with Eureka Server.

Create Eureka Client

Based on micro-weather-eureka-server, we will create a micro-weather-eureka-client as a client and demonstrate how to register itself with the registration server so that it can be invoked by other services.

Change configuration

Add the following configuration:

Dependencies {/ /... Compile ('org.springframework.cloud:spring-cloud-starter-netflix-eureka-client') / /.} the simplest Eureka Client@SpringBootApplication@EnableDiscoveryClient@RestControllerpublic class Application {@ RequestMapping ("/ hello") public String home () {return "Hello world";} public static void main (String [] args) {SpringApplication.run (Application.class, args);}}

@ EnableDiscoveryClient enables service discovery, and as long as Eureka Client is started, it can be perceived by Eureka Server.

Project configuration:

Spring.application.name: micro-weather-eureka-clienteureka.client.serviceUrl.defaultZone: http://localhost:8761/eureka/ run

Client examples are launched on 8081 and 8082, respectively.

Java-jar micro-weather-eureka-client-1.0.0.jar-server.port=8081java-jar micro-weather-eureka-client-1.0.0.jar-server.port=8082

You can see the information about these two entities on Eureka Server.

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