docker-compose用于启动多个springcloud组件和服务,可以实现一键启动,只需要编写一个docker-compose脚本
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1.cloud各个组件(注册中心,路由,链路追踪等等基础服务)的启动
编写docker-compose-base.yml

version: "2"
services:
  eurekaserver:
    image: cloud_test/eurekaserver
    ports:
    - "1111:1111"
    environment:
    - "spring.profiles.active=peer1"
    hostname: peer1
  config:
    image: cloud_test/config
    ports:
    - "1121:1121"
    hostname: config
  zuul:
      image: cloud_test/zuul
      ports:
      - "1115:1115"
      hostname: zuul
      links:
        - "eurekaserver:peer1"
  sleuth:
      image: cloud_test/sleuth
      ports:
      - "1116:1116"
      hostname: sleuth

2.cloud各个服务的启动(自己写的服务提供者,消费者,等等)
编写docker-compose-service.yml

version: "2"
services:
  service_a:
    image: cloud_test/service_a
    ports:
    - "1113:1113"
    external_links:
    - "config"
    - "eurekaserver:peer1"
  service_b:
    image: cloud_test/service_b
    ports:
    - "1114:1114"
    external_links:
    - "eurekaserver:peer1"
    - "service_a"

3.启动命令:

docker-compose -f docker-compose-base.yml up
docker-compose -f docker-compose-service.yml up

4.遇到的坑总结:
1).host配置,docker构建的每个镜像相当于一个独立的环境,访问不能通过localhost来访问,必须为每个服务配置hostname,具体在/etc/hosts中添加记录
2).docker-compose文件编写的时候,links中必须指定服务名和别名,因为docker默认会用别名配置一个hostname
3).docker-compose文件基础服务组件和服务治理的要分开用两个文件编写,先启动基础服务,再启动服务治理的,如果再一个docker-compose中启动的话,会报错
4).environment环境变量的配置,主要用于切换生效的配置文件,写法如上