运行在Docker旧的链接模式 (Legacy Mode)

Legacy link refers to the link created before docker 1.10, and the link created in default bridge network in docker 1.10 or after.

example of legacy links using docker cli

docker run -d --name web1 dockercloud/hello-world
docker run -d --name web2 dockercloud/hello-world
docker run -d -p 80:80 --link web1:web1 --link web2:web2 dockercloud/haproxy

example of docker-compose.yml v1 format:

web1:
  image: 'dockercloud/hello-world:latest'
web2:
  image: 'dockercloud/hello-world:latest'
lb:
  image: 'dockercloud/haproxy:latest'
  links:
    - web1
    - web2
  ports:
    - '80:80'

Note: Any link alias sharing the same prefix and followed by "-/_" with an integer is considered to be from the same service. For example: web-1 and web-2 belong to service web, app_1 and app_2 are from service app, but app1 and web2 are from different services.