Changes
→Edit CT Config
values are providing 2 GB soft limit with 2.5 GB hard limit:
DISKSPACE="2G2.4G:2.5G" If you use independed Gentoo portage tree for each container, is considered correct in the use of gentoo containers, don't forget to raise inodes number DISKINODES="400000:420000" Independed Gentoo portage tree for each container would be good idea, because newer portage can delete older ebuilds already installed in container with other dependences.Otherwise you can't reinstall already installed packages if you bind the newer version of portage in gentoo containers.
After that you copy that configuration file turning it into a sample configuration for later use: