
This patchset implements Neutron rolling upgrade logic as described in [1]. Due to only neutron, vpnass and fwaas have supported for rolling upgrade database migration, so I used the list "neutron_rolling_upgrade_services" in neutron/default/main.yml for contain there services. [1] https://docs.openstack.org/neutron/latest/contributor/internals/upgrade.html Co-author: Ha Manh Dong <donghm@vn.fujitsu.com> Change-Id: I2ed2f941d30d4df0d0f42c0d10e7ca03ec1c166a Implements: blueprint apply-service-upgrade-procedure