Add options to control creation of keystone entities and issuing db_sync

[Bogdan Dobrelya]

When several Openstack nodes is being deployed in parallel, there could be deadlocks in DB backend when trying to db_sync or create the same keystone entities in parallel. This affects all OpenStack puppet modules which create users or roles and so on in keystone or issue db_sync.

[Bogdan Dobrelya (bogdando)]

Note, this is kinda related https://tickets.puppetlabs.com/browse/MODULES-1852 but I believe this should be fixed for Openstack modules as well

[Yanis Guenane (yanis-guenane)]

For the db_sync issue, if my undstanding is correct, this serie of patches[1] aims to fix that

So if you have multiple controller nodes that does db_sync and you have a Galera (or any master/master replication setup) you basically enable the db_sync on a single node only and set it to false for the other node.

[1] https://review.openstack.org/#/q/status:open+branch:master+topic:db_sync,n,z

If I am totally out topic please let me know.

[Bogdan Dobrelya (bogdando)]

Thank you for update @Yanius. This looks great and addressing the issue very well, thank you

[Bogdan Dobrelya (bogdando)]

I cannot assign the bug to you, so feel free to catch it up :)