Overriding hypervisor name for resource provider always requires a complete list of interfaces/bridges

[Takashi Kajinami]

In some deployments, hostnames can be different between hosts and resource provider records. For example in deployment managed by TripleO we use short host name (without domain name) in host, while we use FQDN for resource provider records (this comes from the FQDN set to the host
option in nova.conf).

This causes an issue with the way how currently neutron looks up the root resource provider because placment API requires the exact hostname and doesn't automatically translate short name and FQDN.

To fix the issue we need to set the resource_provider_hypervisors option[1] now but it is very redundant to list up all devices or bridges in this option to override hostnames for the devices/bridges by the same value.

[1] https://review.opendev.org/#/c/696600/

[Lajos Katona (lajos-katona)]

Related patch: https://review.opendev.org/c/openstack/neutron/+/763563

[Takashi Kajinami (kajinamit)]

Closing this because our expectation here is that neutron and libvirt should detect the same hostname.
I've reported another bug to fix current incompatibility.

 https://bugs.launchpad.net/neutron/+bug/1926693