mvn clean package docker：build
[root@master microservice-discovery-eureka-ha]# docker images
REPOSITORY                                          TAG                 IMAGE ID            CREATED             SIZE
itmuch/microservice-discovery-eureka-ha             0.0.1-SNAPSHOT      e3583aa71ccb        14 seconds ago      685MB

spring:
  application:
    name: microservice-discovery-eureka-ha
---
spring:
  profiles: peer1                                 # 指定profile=peer1
server:
  port: 8761
eureka:
  instance:
    hostname: peer1                               # 指定当profile=peer1时，主机名是peer1
  client:
    serviceUrl:
      defaultZone: http://peer2:8762/eureka/      # 将自己注册到peer2这个Eureka上面去

---
spring:
  profiles: peer2
server:
  port: 8762
eureka:
  instance:
    hostname: peer2
  client:
    serviceUrl:
      defaultZone: http://peer1:8761/eureka/

version: "2"
services:
  peer1:      # 默认情况下，其他服务可使用服务名称连接到该服务。对于peer2节点，它需连接http://peer1:8761/eureka/，因此，我们可配置该服务的名称为peer1。
    image: itmuch/microservice-discovery-eureka-ha:0.0.1-SNAPSHOT
    ports:
      - "8761:8761"
    environment:
      - spring.profiles.active=peer1
  peer2:
    image: itmuch/microservice-discovery-eureka-ha:0.0.1-SNAPSHOT
    hostname: peer2
    ports:
      - "8762:8762"
    environment:
      - spring.profiles.active=peer2

docker-compose up