Linux Shell Scripting Cookbook - Third Edition

Creating an Ethernet bridge

A container cannot access your Ethernet adapter directly. It requires a bridge between the Virtual Ethernet and the actual Ethernet. Recent Ubuntu distributions create an Ethernet bridge automatically when you install the lxc package. Debian and Fedora may require that you manually create the bridge. To create a bridge on Fedora, use the libvirt package to create a virtual bridge first:

    # systemctl start libvirtd

Then, edit /etc/lxc/default.conf to reference virbr0 instead of lxcbr0:

    lxc.network_link = virbr0

If you've already created a container, edit the config file for that container as well.

To create a bridge on Debian systems, you must edit the network configuration and the container configuration files. ...