SpringCloud eureka 集群搭建

 进入https://spring.io/tools3/sts/all/ 下载配套的spring tool ，yml 可以有提示功能。

1、eureka 是springCloud 服务的注册中心。

   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>2.1.8.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.fandong.it.springCloudDmeo</groupId>
    <artifactId>registry-eureka</artifactId>
    <version>1.0-SNAPSHOT</version>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Greenwich.SR3</spring-cloud.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

  --application.yml

server:
  port: 8100
  hostname: eureka.fandong.com
eureka:
  client:
    serviceUrl:
      defaultZone: http://${server.hostname}:${server.port}/eureka/
    registerWithEureka: false
    fetchRegistry: false

启动代码

/**
 * 
 */
package com.it.eurekaregistry;

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

/**
 * @author fandong
 *
 */
@SpringBootApplication
@EnableEurekaServer
public class Application {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		SpringApplication.run(Application.class, args);
	}

}

启动：

[root@eureka registry]# java -jar registry-eureka-1.0-SNAPSHOT.jar 

浏览器查看

修改配置文件使Eureka 相互注册，搭建三台，这里通过改变端口号来启动

只用修改配置文件就可以了

spring:
  application:
    name: registry-eureka
---
spring:
  profiles: node-8100
server:
 port: 8100
 hostname: eureka.fandong.com
eureka:
  client:
    serviceUrl:
      defaultZone: http://eureka.fandong.com:8200/eureka/,http://eureka.fandong.com:8300/eureka/
    registerWithEureka: true
    fetchRegistry: true
---
spring:
  profiles: node-8200
server:
  hostname: eureka.fandong.com
  port: 8200
eureka:
  client:
    serviceUrl:
      defaultZone: http://eureka.fandong.com:8100/eureka/,http://eureka.fandong.com:8300/eureka/
    registerWithEureka: true
    fetchRegistry: true
---
spring:
  profiles: node-8300
server:
  hostname: eureka.fandong.com
  port: 8300
eureka:
  client:
    serviceUrl:
      defaultZone: http://eureka.fandong.com:8100/eureka/,http://eureka.fandong.com:8200/eureka/
    registerWithEureka: true
    fetchRegistry: true

启动：

    使用后台进程运行

^C[root@eureka registry]# nohup java -jar registry-eureka-1.0-cluster.jar --spring.profiles.active=node-8100 &
[1] 9849
[root@eureka registry]# nohup: 忽略输入并把输出追加到"nohup.out"

[root@eureka registry]# nohup java -jar registry-eureka-1.0-cluster.jar --spring.profiles.active=node-8200 &
[2] 9861
[root@eureka registry]# nohup: 忽略输入并把输出追加到"nohup.out"

[root@eureka registry]# nohup java -jar registry-eureka-1.0-cluster.jar --spring.profiles.active=node-8300 &
[3] 9874
[root@eureka registry]# nohup: 忽略输入并把输出追加到"nohup.out"

浏览器查看

  使用脚本一键启动和关闭

启动：

  

#启动脚本
[root@eureka registry]# vi start-eureka-cluster.sh 

#!/bin/bash

echo "start spring eureka cluster ...."
ports=(8100 8200 8300)

for port in ${ports[@]}
do
  echo "starting port: ${port}";
  echo "node-${port}";
  java -jar registry-eureka-1.0-cluster.jar  --spring.profiles.active=node-${port}  &
  if [ $? = 0 ] ; then
     echo " port ${port} start ok";
  else
    echo "  port ${port} start fail";
  fi
done

#关闭脚本
[root@eureka registry]# vi stop-eureka-cluster.sh 

#!/bin/bash

echo "stopping cluster"

jps | grep 'jar' | awk '{print $1}'| xargs kill

if [ $? = 0 ] ; then

  echo "execute success!";
else
  echo "execute fail";
fi
~    

Docker 容器启动：