Detailed explanation of achieving high availability of eureka through docker and docker-compose

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 If this configuration is true, it means that the IP is registered to eureka. If this is the case, the eureka server cannot discover Replicas through the server.
# Therefore, if you want to achieve high availability of eureka through Docker, it is best to use the default value (false) for this configuration
# It is not impossible to configure it to true and achieve high availability, but each eureka service needs to be mapped outside the Docker environment and know the IP.
---
spring:
 profiles: test_ha_2

eureka:
 client:
  serviceUrl:
   defaultZone: http://eurekaserver1:${server.port}/eureka/
 instance:
  hostname: eurekaserver2
# prefer-ip-address: true

 <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>
        <configuration>
          <imageName>itmuch/${project.artifactId}:${project.version}</imageName>
          <forceTags>true</forceTags>
          <baseImage>java</baseImage>
          <entryPoint>["java", "-jar", "/${project.build.finalName}.jar"]</entryPoint>
          <resources>
            <resource>
              <targetPath>/</targetPath>
              <directory>${project.build.directory}</directory>
              <include>${project.build.finalName}.jar</include>
            </resource>
          </resources>
        </configuration>-->
      </plugin>
    </plugins>
  </build>

FROM java:8

ADD eureka-server-1.0.0.jar eurekaserver.jar
ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar","/eurekaserver.jar"]

version: '2'
services:
 eurekaserver1:
  image: raynspace/eureka-server:1.0.0
  ports:
   - "7900:8900"
  environment:
   - spring.profiles.active=test_ha_1

 eurekaserver2:
  image: raynspace/eureka-server:1.0.0
  #hostname: eurekaserver2
  ports:
   - "7800:8900"
  environment:
   - spring.profiles.active=test_ha_2