sprinCloud学习之搭建Eureka Server集群

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#spring cloud #eureka server

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本文介绍了在Java环境下，使用Spring Boot 2.1.6和Spring Cloud Greenwich.SR2搭建Eureka Server集群的详细步骤，包括创建Maven父工程和子模块，配置相关依赖和Eureka Server信息，确保服务之间的互相注册以实现集群功能。

1、项目环境：

java版本：jdk1.8，

语言版本：spring-boott 2.1.6-Release ，spring-Cloud Greenwich.SR2

开发工具： IDEA 2018.2

2、搭建步骤

1）、新建一个maven父工程与两个maven 子模块

2）、在pom文件引入相关依赖与配置，如下

父工程的pom.xml内容：

<?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>2.1.6.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>cn.edu.scau</groupId>
    <artifactId>spring-cloud-demo-3</artifactId>
    <packaging>pom</packaging>
    <version>1.0-SNAPSHOT</version>
    <modules>
        <module>eureka-server01</module>
        <module>eureka-server02</module>
    </modules>

    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Greenwich.SR2</spring-cloud.version>
    </properties>

    <dependencies>
        <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>

    <repositories>
        <repository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/milestone</url>
        </repository>
    </repositories>
</project>

两个maven子模块的pom文件内容相同，如下

<?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-cloud-demo-3</artifactId>
        <groupId>cn.edu.scau</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>eureka-server02</artifactId>

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

3）、在子模块中配置eureka server相关信息，如下，

server:
  port: 8761

spring:
  application:
    name: eureka-server01
eureka:
  instance:
    hostname: eureka-server01.com

  client:
    register-with-eureka: false
    fetch-registry: false
    service-url:
      defaultZone: http://eureka-server02.com:8762/eureka/

server:
  port: 8762

spring:
  application:
    name: eureka-server02
eureka:
  instance:
    hostname: eureka-server02.com

  client:
    register-with-eureka: false
    fetch-registry: false
    service-url:
      defaultZone: http://eureka-server01.com:8761/eureka/

注意：子模块工程的服务注册地址为另一个子模块的服务注册地址，这样才能搭起集群。

4）在子模块工程的主启动类上添加@EnableEurekaServer注解，启动Eureka 服务注册中心

3、效果展示