Docker container Link

Container and container communicate with each other. The official name is linking containers together!

The most common is to run a web iner and a DB container to link the Web container to the DB container;

A network channel (BRIDGE) is established between two containers through link, and DB iner only needs to know the alias and open port number of the previous container;

Example:

Start a DB container first:

$ sudo docker run -d --name db training/postgres

Then start Web Container link dB container

$ sudo docker run -d -P --name web --link db:db training/webapp python app.py

Note -- Link flag takes the form:

--link name:alias

View through docker PS:

$ docker psCONTAINER ID  IMAGE                     COMMAND               CREATED             STATUS             PORTS                    NAMES349169744e49  training/postgres:latest  su postgres -c ‘/usr  About a minute ago  Up About a minute  5432/tcp                 db, web/dbaed84ee21bde  training/webapp:latest    python app.py         16 hours ago        Up 2 minutes       0.0.0.0:49154->5000/tcp  web

The DB container Web/DB shows that the Web container has been linked to the DB container.

This article is from the "Siberian wolf" blog, please be sure to keep this source http://kernal.blog.51cto.com/8136890/1538610