OVN as a Provider Driver for Octavia in ovn-octavia-provider

[Lewis Denny]

- [X] This is a doc addition request.

Under Limitations of the OVN Provider Driver[1] I believe we should add that manual failover is not supported as per [2]

This also should be updated imo [3]

[1] https://docs.openstack.org/ovn-octavia-provider/latest/admin/driver.html#limitations-of-the-ovn-provider-driver

[2] https://bugs.launchpad.net/neutron/+bug/1901936

[3] https://docs.openstack.org/ovn-octavia-provider/latest/contributor/loadbalancer.html#limitations

[Luis Tomas Bolivar (ltomasbo)]

This is not a limitation. The failover action is already properly handle to state it is not supported. But this is not due to a limitation into the ovn-octavia driver, but due to not needed this functionality at all (I would say this is an improvement). In amphora case you have a VM that needs to be recovered (failover) in certain ocassions. In ovn-octavia there is no VM for loadbalancing (with its pros and cons), and the flows are already distributed in all the nodes, so there is no need to failover/recover anything

[Luis Tomas Bolivar (ltomasbo)]

btw, related to that this is also not a limitation: "Octavia flavors are not supported."