springcloud（三，高可用eureka，集群eureka）-蒲公英云

文章目录

- 为什么要集群eureka
- 搭建集群
- 服务注册
- 启动测试

为什么要集群eureka

如果我们只有一个注册中心eureka，这个注册中心如果挂了我们所有服务就直接全部挂了，所以我们需要对eureka做集群

搭建集群

创建两个eureka
在这里插入图片描述
父依赖

<?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>
<groupId>com.zou</groupId>
<artifactId>springcloud-shopping-parent</artifactId>
<version>1.0-SNAPSHOT</version>
<modules>
    <module>springcloud-shopping-eurekaserver</module>
    <module>springcloud-shopping-eurekaserver1</module>
</modules>
<packaging>pom</packaging>
<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.1.RELEASE</version>
    <relativePath/>
</parent>
<!--指定编码格式及jdk版本-->
<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <java.version>1.8</java.version>
    <spring-cloud.version>Finchley.M9</spring-cloud.version>
</properties>
<!--集成web-->
<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
  </dependencies>
<!--指定springcloud版本-->
<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>

    <!-- 注意： 这里必须要添加， 否者各种依赖有问题 -->
    <repositories>
        <repository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/libs-milestone</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
    </repositories>
</project>

两个eureka的依赖一致

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

springcloud-shopping-eurekaserver配置文件 application.yml

服务端口号
server:
port: 8009

eureka 基本信息配置
spring:
application:
```
name: eureka-server
```
eureka:
instance:
```
###注册到eureka ip地址
 hostname: 127.0.0.1
```
client:
```
serviceUrl:
  defaultZone: http://127.0.0.1:8100/eureka/
###集群改为true注册到其他eureka
register-with-eureka: true
###群改为true注册到其他eureka
fetch-registry: true
```
- 这里与单机版不同的是 register-with fetch-registry都改为 true
- defaultZone: http://127.0.0.1:8100/eureka/地址为需要注册的另一台eureka 地址，如果是多台以上用逗号隔开如(defaultZone: http://127.0.0.1:8100/eureka/,http://127.0.0.1:8008/eureka/)
- 集群必须要有项目名，即spring.application.name,且必须相同

springcloud-shopping-eurekaserver1配置文件 application.yml

服务端口号

server:
port: 8100

eureka 基本信息配置

spring:
application:

name: eureka-server

eureka:
instance:

###注册到eureka ip地址
 hostname: 127.0.0.1

client:

serviceUrl:
  defaultZone: http://127.0.0.1:8009/eureka/
###集群改为true注册到其他eureka
register-with-eureka: true
###群改为true注册到其他eureka
fetch-registry: true

唯一不同为defaultZone: http://127.0.0.1:8009/eureka/

启动类
EurekaServer.java

@SpringBootApplication
@EnableEurekaServer
public class EurekaServer { 
    public static void main(String[] args) { 
        SpringApplication.run(EurekaServer.class);
    }
}

服务注册

这里我们服务使用 springcloud-shopping-member
配置文件 application.yml

server:
  port: 9100
spring:
  application:
    name: shopping-member
eureka:
  client:
    service-url:
      defaultZone: http://127.0.0.1:8009/eureka/,http://127.0.0.1:8100/eureka/
    register-with-eureka: true
    fetch-registry: true