The error can reproduced with an fresh installed openstack-bundle with octavia on Ubuntu 20.04 LTS Focal.
juju status → all services are fine.
In Openstack Dashboard under Project / Loadbalancers:
Error: Unable to retrieve load balancer
CLI: openstack loadbalancer list
Unable to establish connection to https://10.6.66.11:9876/v2.0/lbaas/loadbalancers: (‘Connection aborted.’, RemoteDisconnected(‘Remote end closed connection without response’,))
openstack loadbalancer list
Unknown Error (HTTP 500) (Request-ID: None)
Octavia-Config:
octavia-ovn-chassis: charm: cs:ovn-chassis octavia-mysql-router: charm: cs:mysql-router-10 bindings: “”: *internal-space octavia: charm: cs:octavia-34 num_units: 3 bindings: “”: *internal-space options: openstack-origin: *openstack-origin vip: 10.6.66.11 vip_cidr: 18 region: de1 to: - lxd:0 - lxd:1 - lxd:2 octavia-hacluster: charm: cs:hacluster-76 options: cluster_count: 3 corosync_transport: unicast octavia-dashboard: charm: cs:octavia-dashboard