Interconnection between containers (1)

Suppose we have an application image and a db image. We definitely want the isolation between the application's container and the db's container, but the application can access the db. So we are faced with a problem, how to communicate between containers? This time we discuss the situation between containers of the same host (mainly looking at bridges).

1. custom network

   docker network create --deiver bridge --subnet 172.22.0.0/24 --gateway 172.22.0.1 mynet

   Check:

   docker network inspect mynet

    

2. Use a custom network

   docker run -t --name b2 --network mynet --ip 172.22.0.2 busybox
   docker run -t --name b3 --network mynet --ip 172.22.0.3 busybox

    

3. test

   docker exec -i b3 bin/sh

   ping -c 3 b2