Spring-Cloud-Eureka-Server

Eureka服务器配置与多实例交互

最新推荐文章于 2024-01-03 20:41:33 发布

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本文档展示了如何配置Eureka服务器进行独立部署、双实例交互以及多个实例的分裂模式交互。通过修改`application.yml`文件，设置Eureka实例的注册、发现及服务URL，实现不同模式下的服务注册与发现。同时，`prefer-ip-address`属性可以调整为true，使服务使用IP地址而非主机名进行广告宣传。

Eureka-server

pom

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>spring-clould-Official</artifactId>
        <groupId>com.wx</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

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

</project>

EurekaServerApplication.java(启动程序)

package com.wx;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;

@SpringBootApplication
@EnableEurekaServer
public class EurekaServerApplication {

    public static void main(String[] args) {
        SpringApplication.run(EurekaServerApplication.class,args);
    }
}

application.yml（独立部署模式）

server:
  port: 8761

eureka:
  instance:
    hostname: localhost
  client:
    registerWithEureka: false
    fetchRegistry: false
    serviceUrl:
      defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/

独立部署demo

在这里插入图片描述

application.yml（两个交互模式模式）

The First one >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

server:
  port: 8761


eureka:
  instance:
    hostname: localhost

  client:
#    registerWithEureka: false
#    fetchRegistry: false
    serviceUrl:
      defaultZone: http://${eureka.instance.hostname}:8762/eureka/
spring:
  application:
    name: eureka-server

The Second one >>>>>>>>>>>>>>>>>>

server:
  port: 8762

eureka:
  instance:
    hostname: localhost
  client:
#    registerWithEureka: false
#    fetchRegistry: false
    serviceUrl:
      defaultZone: http://${eureka.instance.hostname}:8761/eureka/
spring:
  application:
    name: eureka-server-01

两个交互demo

在这里插入图片描述

application.yml（多个交互分裂模式模式）

The First one >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

server:
  port: 8761


eureka:
  instance:
    hostname: localhost

  client:
#    registerWithEureka: false
#    fetchRegistry: false
    serviceUrl:
      defaultZone:  http://${eureka.instance.hostname}:8761/eureka/,http://${eureka.instance.hostname}:8762/eureka/,http://${eureka.instance.hostname}:8763/eureka/
spring:
  application:
    name: eureka-server

The Second one >>>>>>>>>>>>>>>>>>

server:
  port: 8762

eureka:
  instance:
    hostname: localhost
  client:
#    registerWithEureka: false
#    fetchRegistry: false
    serviceUrl:
      defaultZone:  http://${eureka.instance.hostname}:8761/eureka/,http://${eureka.instance.hostname}:8762/eureka/,http://${eureka.instance.hostname}:8763/eureka/
spring:
  application:
    name: eureka-server-01

The Third one >>>>>>>>>>>>>>>>>>>>>>>

server:
  port: 8763

eureka:
  instance:
    hostname: localhost
  client:
    serviceUrl:
      defaultZone: http://${eureka.instance.hostname}:8761/eureka/,http://${eureka.instance.hostname}:8762/eureka/,http://${eureka.instance.hostname}:8763/eureka/
spring:
  application:
    name: eureka-server-02

多个交互分裂模式模式demo

在这里插入图片描述

When to Prefer IP Address

In some cases, it is preferable for Eureka to advertise the IP addresses of services rather than the hostname. Set eureka.instance.preferIpAddress to true and, when the application registers with eureka, it uses its IP address rather than its hostname.