SpringCloud搭建高可用EurekaServer集群
创建三个springboot项目,并引入eureka-server依赖,这里不细说了,可以到https://start.spring.io上面去自动生成项目
pom.xml
<?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">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.4.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>demo</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<spring.cloud.version>2.1.0.RELEASE</spring.cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
</dependency>
<!-- eureka依赖 -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
<version>${spring.cloud.version}</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
创建三个项目,demo、eureka2、eureka3,这里贴出demo代码,其他两个,改下名字就可以了
application.yml
#记住每个属性和值之间,要在冒号后面加一个空格
#指定启用端口
server:
port: 8761
#fetchRegistry:表示是否从eureka server获取注册信息,如果是单一节点,不需要同步其他eureka server节点,就设置为false
#此处为集群,应该设置为true,可以不设置,默认是true。
#registerWithEureka:表示表示是否把自己注册为eureka server,此处为集群,把自己注册到eureka server并通知群众
#所以应该开启,默认为true。可不显示设置。serviceurl是eureka server注册地址
#defaultZone:可以设置多个注册区域
#eviction-interval-timer-in-ms:关闭注册中心自我保护机制
#eviction-interval-timer-in-ms:注册中心清理间隔,单位毫秒
eureka:
instance:
hostname: peer1
client:
registerWithEureka: true
fetchRegistry: true
serviceurl:
defaultZone: http://peer2:8762/eureka/
#server:
#enable-self-preservation: false
#eviction-interval-timer-in-ms: 10000
#设置应用名称
spring:
application:
name: eureka-server
Applciation
package com.example.demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
import org.springframework.context.annotation.ComponentScan;
@SpringBootApplication
@ComponentScan(basePackages={"com.example.*"})
@EnableEurekaServer
public class DemoApplication {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}
修改本地host
访问三个EurekaServer,如下图
这里我们可以看到DS Replicas集群信息和Applciation微服务注册列表,还有通用信息