Can I get ip address inside my docker container?

Question

How to get container ip address inside this container?

\'docker inspect $hostname ...\' not suitable, because I don\'t share /var/run/docker.sock host file to contai

Answer 1

Normally you can use the linux program ifconfig to get IP addresses and other networking details. Your container may not have it, in which case you'll need to install it via apt-get or yum or your distro's package manager. A basic pipeline to get the IP address would be

ifconfig eth0 | grep "inet addr:" | cut -d : -f 2 | cut -d " " -f 1

Answer 2

As the IP address is in the first line of /etc/hosts, you can do in a container the awk command that prints the first word of the first line of /etc/hosts

$ awk 'END{print $1}' /etc/hosts
172.17.0.14

Answer 3

If you prefer to use ip rather than ifconfig, on Linux you can do:

ip addr | grep inet | tr -s ' ' | cut -d ' ' -f 3

This simply gets all of the IP addresses and interfaces, searches only for those starting with inet and returns only the 3rd column.

As a nice side-effect, this includes the subnet mask, too! (e.g. 172.17.0.2/16)

If you don't want the subnet mask, you can use:

ip addr | grep inet | tr -s ' ' | cut -d ' ' -f 3 | tr -d '/'

NOTE: This shows ALL of the IPs in the container. You can use awk or sed to remove 127.0.0.1/16 and other unwanted IPs. :)