运行在Docker云 (Cloud Mode)

1. Launch the service you want to load-balance using Docker Cloud.

2. Launch the load balancer. To do this, select "Jumpstarts", "Proxies" and select dockercloud/haproxy. During the "Environment variables" step of the wizard, link to the service created earlier (the name of the link is not important), and add "Full Access" API role (this will allow HAProxy to be updated dynamically by querying Docker Cloud's API).

   Note:

   • If you are using docker-cloud cli, or stackfile, please set roles to global
   • Please DO NOT set sequential_deployment: true on this image.

That's it - the haproxy container will start querying Docker Cloud's API for an updated list of containers in the service and reconfigure itself automatically, including:

• start/stop/terminate containers in the linked application services
• start/stop/terminate/scale up/scale down/redeploy the linked application services
• add new links to HAProxy
• remove old links from HAProxy

example of stackfile in Docker Cloud:

web:
  image: 'dockercloud/hello-world:latest'
  target_num_containers: 2
lb:
  image: 'dockercloud/haproxy:latest'
  links:
    - web
  ports:
    - '80:80'
  roles:
    - global