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docker network centos debian

Docker Network configuration on Debian 8 and CentOS 7


My configuration is to run a full VM and then launch several containers on it.
Tha VM can be a CentOS or a Debian.
As of writing, current versions are Debian 8 and CentOS 7

Debian 8

You can decide what subnet you want the containers work in.
Default is "172.17.0.0/16", and the "docker0" belongs to that range.
By setting up the "--bip" option in "/etc/default/docker" you can force "docker0" range:

DOCKER_OPTS=" --bip=172.17.250.1/24 "

CentOS 7


CentOS has a slightly different configuration layout.
By setting up the "--bip" option in "/etc/sysconfig/docker-network" you can force "docker0" range:

DOCKER_NETWORK_OPTIONS=" --bip=172.17.250.1/24 "

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