Add live migration options to nova.conf template

[Albert Mikaelyan]

Options such as 'live_migration_permit_auto_converge' are missing from nova.conf temlpate.
The options were released in this spec: https://blueprints.launchpad.net/nova/+spec/auto-live-migration-completion
And are available at least since Ocata.

This options help with live migrations not completing because the instances are very busy at the time.

[Bjoern (bjoern-t)]

Hi Albert,

you can use the nova config template for that and add to your override:

nova_nova_conf_overrides:
  DEFAULT:
    live_migration_permit_auto_converge: True

The use of the conf overrides are documented at https://github.com/openstack/openstack-ansible-os_nova/blob/master/doc/source/configure-nova.rst