Check out suggested in

https://ask.openstack.org/en/question/49874/nova-docker-issue-import-error-no-module-named-i18n/

by Lars Kellogg Stedman

pip install -e git+https://github.com/stackforge/nova-docker#egg=novadocker
cd src/novadocker/ 
git checkout -b pre-i18n 9045ca43b645e72751099491bf5f4f9e4bddbb91
python setup.py install

works fine.

 However, python-oslo-i18n-1.0.0-1.el7.centos.noarch is installed on CentOS 7, I would expect
 to exist more recent commit in master or another branch suitable for build nova-docker driver
 on Juno. Attempt to clone all the tree gave me system unable to start containers on Juno.
 I also had no luck with commit 3fd99f8516f890b45b928b0bce4439bb003c0bb1

 Thanks
 Boris.