Eureka组件使用

eureka是一款spring系列监控进程的

1. 初始化eureka

创建一个eureka模块，加入依赖，配置application.yml，启动类添加@EnableEurekaServer

依赖:

<dependencies>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
    </dependency>
</dependencies>

application.yml：

spring:
  application:
    name: myeureka
server:
  port: 8088
eureka:
  client:
    service-url:
      defaultZone: http://localhost:8088/eureka
    fetch-registry: false
    register-with-eureka: false

到这里eureka就完成了，可以打开http://localhost:8088/查看

2. 给项目添加eureka

给项目（子模块）添加eureka，让eureka监控你的项目进程

1. 添加依赖
2. 启动类添加@EnableEurekaClient注解
3. 配置application.yml
4. 完成！如需负载均衡《配合eureka使用ribbon负载均衡》

依赖：

 <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
    </dependency>

application.yml：

eureka:
  client:
    service-url:
      defaultZone: http://localhost:8088/eureka
  instance:
    prefer-ip-address: true
    instance-id: ${spring.cloud.client.ip-address}:${server.port}
    lease-renewal-interval-in-seconds: 5
    lease-expiration-duration-in-seconds: 10

注意：需要先启动eureka后，才能启动已经添加eureka监控的项目