The platform is stable/rocky and using kolla-ansible to deploy.

And all storage backends are connected to Ceph.

Before I try to evacuate host, the source host had about 24 VMs running.

When I shutdown the node and execute evacuation, there're few VMs failed. The error code is 504.

Strange is those VMs are all attach its own volume.

Then I check nova-compute log, a detailed error has pasted at below link;

Does anyone have any experience with this? I googled but no enough information about this.

Thanks!