详解通过docker和docker-compose实现eureka高可用

最近新项目有使用到springcloud 和docker，关于这两个技术就不分别介绍了，现在分享一下通过docker,docker-compose实现eureka高可用的方案。

1. eureka server项目目录结构：

2. eureka 配置文件配置：

server:
 port: 8900
spring:
 application:
  name: eureka-server
 profiles:
  active: dev
management:
 security:
  enabled: false
 health:
  rabbit:
   enabled: false
---
spring:
 profiles: dev
eureka:
 client:
  serviceUrl:
   defaultZone: http://localhost:${server.port}/eureka/
  register-with-eureka: false
  fetch-registry: false
 instance:
  hostname: localhost
  prefer-ip-address: true
---
spring:
 profiles: test_ha_1
eureka:
 client:
  serviceUrl:
   defaultZone: http://eurekaserver2:${server.port}/eureka/
 instance:
  hostname: eurekaserver1
#  prefer-ip-address: true 该配置为true表示注册到eureka上的是IP，如果这样的化，eureka服务器就不能通过服务器发现Replicas。
#               故如果想通过Docker实现eureka高可用，该配置最好使用默认值（false）
#               此处配置为true且实现高可用也不是没有办法，就是每个eureka服务需映射到Docker环境外，且知道ip。
---
spring:
 profiles: test_ha_2
eureka:
 client:
  serviceUrl:
   defaultZone: http://eurekaserver1:${server.port}/eureka/
 instance:
  hostname: eurekaserver2
#  prefer-ip-address: true

3. docker maven插件配置：

 <build>
    <plugins>
      <plugin>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-maven-plugin</artifactId>
      </plugin>
      <plugin>
        <groupId>com.spotify</groupId>
        <artifactId>docker-maven-plugin</artifactId>
        <version>0.4.13</version>
        <configuration>
          <imageName>${docker.image.prefix}/${project.artifactId}:${project.version}</imageName>
          <dockerDirectory>src/main/docker</dockerDirectory>
          <forceTags>true</forceTags>
          <resources>
            <resource>
              <targetPath>/</targetPath>
              <directory>${project.build.directory}</directory>
            </resource>
          </resources>
        </configuration>
        <!--<groupId>com.spotify</groupId>
        <artifactId>docker-maven-plugin</artifactId>
        <version>0.4.13</version>								 
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