undercloud database for neutron needs to be migrated to ovs_neutron

[Emilien Macchi]

When migrating to a containerized undercloud, we deploy services by using THT. The neutron-api service in THT use ovs_neutron database name, but the database created by instack-undercloud is neutron.

So we need to rename the old db to be ovs_neutron, so the dbname will be the same as the overcloud.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/549609

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/549609
Committed: https://git.openstack.org/cgit/openstack/tripleo-heat-templates/commit/?id=5cb155eb7c7bb98d2be3b32c7f860d597eb2fd36
Submitter: Zuul
Branch: master

commit 5cb155eb7c7bb98d2be3b32c7f860d597eb2fd36
Author: Emilien Macchi <email address hidden>
Date: Sun Mar 4 13:40:32 2018 +0000

    neutron: rename db when upgrading a containerized undercloud

    When the undercloud was not containerized, the neutron database name was called neutron.
    When we upgrade to a containerized undercloud, the database name is called ovs_neutron.
    We introduced MigrateLegacyNeutronDb (false by default in the service but true when
    the undercloud is containerized) that will rename the database during host_prep_tasks.

    Also, we'll make sure mariadb is stopped before running Puppet steps,
    but only when we deploy a containerized undercloud and also when mariadb
    was actually running. The tasks are idempotent and tested.

    Change-Id: I009cd38f4d10bf3942c8f18f90c6a0fa50858219
    Closes-Bug: #1753247

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/tripleo-heat-templates 9.0.0.0b2 development milestone.