Unable to set the default_provider_driver parameter

[Edwin Schripsema]

If you only use the ovn provider with octavia (and set the parameter use_amphora=false) then the default driver still uses amphora instead of ovn.

It is working on the commandline if i specify --provider ovn, but it isn't working from horizon because the default is still amphora.

openstack loadbalancer create --vip-network-id 1073c754-f10f-40dd-8a5f-d5f7fcbc489f --name test
Provider 'amphora' is not enabled

When i set the default_provider_driver = ovn in the api_settings section in octavia.conf, then it is working again.

[api_settings]
{% if options.enable_amphora -%}
enabled_provider_drivers = amphora:The Octavia Amphora driver,ovn:Octavia OVN driver
default_provider_driver = amphora
{% else -%}
enabled_provider_drivers = ovn:Octavia OVN driver
default_provider_driver = ovn
{% endif -%}

[Alex Kavanagh (ajkavanagh)]

Yes, this looks like it should've been set before, as per the report. The OVN provider has only really been provided since ussuri, and so this should be backported through to ussuri.

I don't think an configuration option should be provided and just work from the "enabled_amphora" option as per the report above.