Docker network command

   
 docker  
 sysadmin  
Table of Content

Preface

Main idea: Command to inspect network IP Address in docker container

Container IP Address

First, Docker allocates a dynamic IP address on every running container.

Whenever a container is restarted, you will get a new IP address. You can get the IP address range from the Docker network interface in the Linux box. Run the following command to see Docker’s network range:

$ ip a | grep docker | grep inet
    inet 172.17.42.1/16 scope global docker0

My container’s IP address is 172.17.0.20 which is in the range of 172.17.42.1/16. Let’s restart the container, and you should get a new IP address being assigned by Docker:

$ docker stop test-mysql
$ docker start test-mysql
$ docker inspect test-mysql | grep IPAddress
        "IPAddress": "172.17.0.21",