Used patch from commit https://git.launchpad.net/maas/commit/?id=df9a79b9dba9c9beee8c2c272263085f5dc02bad to modify /usr/lib/python3/dist-packages/provisioningserver/kernel_opts.py, restarted associated services and solved the problem on MAAS 2.1.
It would be nice if the patch would be officially backported to 2.1 branch.
Used patch from commit https:/ /git.launchpad. net/maas/ commit/ ?id=df9a79b9dba 9c9beee8c2c2722 63085f5dc02bad to modify /usr/lib/ python3/ dist-packages/ provisioningser ver/kernel_ opts.py, restarted associated services and solved the problem on MAAS 2.1.
It would be nice if the patch would be officially backported to 2.1 branch.