Hi *, I have a kind of strange case which I'm trying to solve for hours, I could use some fresh ideas. It's a HA cloud (Victoria) deployed by Salt and the 2 control nodes are managed by pacemaker, the third controller will join soon. There are around 16 compute nodes at the moment. This two-node-control plane works well, except if there are unplanned outages. Since the last outage of one control node we struggle to revive neutron (I believe neutron is the issue here). I'll try to focus on the main issue here, let me know if more details are required. After the failed node was back online all openstack agents show as "up" (openstack compute service list, openstack network agent list). Running VMs don't seem to be impacted (as far as I can tell). But we can't create new instances in existing networks, and since we use Octavia we also can't (re)build any LBs at the moment. When I create a new test network the instance spawns successfully and is active within a few seconds. For existing networks we get the famous "port binding failed" from nova-compute.log. But I see the port being created, it just can't be attached to the instance. One more strange thing: I don't see any entries in the nova-scheduler.log or nova-conductor.log for the successfully built instance, except for the recently mentioned etcd3gw message from nova-conductor, but this didn't impact the instance creation yet. We have investigated this for hours, we have rebooted both control nodes multiple times in order to kill any remaining processes. The galera DB seems fine, rabbitmq also behaves normally (I think), we tried multiple times to put one node in standby to only have one node to look at which also didn't help. So basically we restarted everything multiple times on the control nodes and also nova-compute and openvswitch-agent on all compute nodes, the issue is still not resolved. Does anyone have further ideas to resolve this? I'd be happy to provide more details, just let me know what you need. Happy Easter! Eugen