I raised a bug for this, but tearing hair out so also posting here.
I install Octavia along with openstack-base using the vanilla overlay, which appears to work fine. However, if I then forcibly restart the octavia unit it seems that the WSGI component of the Octavia API then stops working. After a timeout, the client returns;
Unable to establish connection to https://192.168.200.193:9876/v2.0/lbaas/loadbalancers: ('Connection aborted.', RemoteDisconnected('Remote end closed connection without response'))
In /var/log/apache2/octavia_error.log there are these messages;
[Tue Dec 22 11:13:38.488467 2020] [wsgi:error] [pid 3449:tid 139866935383808] [client 127.0.0.1:50482] Timeout when reading response headers from daemon process 'octavia-api': /usr/bin/octavia-wsgi
Any similar experience here? Many thanks in advance!