All; I feel like I've dealt with this issue before, but I can't find any records of it. I've been swapping out the compute nodes in my cluster for newer and better hardware. We also decided to abandon CentOS. All the differences mean that we haven't been able to do live migrations. I now have 2 servers with the same CPUs, OS (Ubuntu), OS Version (20.10), etc., and would like to get live migration working again. I configured passwordless ssh access between the servers for the nova users to get cold migration working. I have also configured passwordless ssh for the root users in accordance with [1]. When I try to do a live migration, the origin server generates this error, in the nova-compute log: 2021-11-19 15:52:31.130 15610 ERROR nova.virt.libvirt.driver [-] [instance: 5935c07d-0c7f-48cc-a4b9-674504fc6005] Live Migration failure: operation failed: Failed to connect to remote libvirt URI qemu+tcp://<remote_server>/system: authentication failed: authentication failed: libvirt.libvirtError: operation failed: Failed to connect to remote libvirt URI qemu+tcp://<remote_server>/system: authentication failed: authentication failed At one point, I came across a tutorial on configuring live-migration for libvirt, which included a bunch of user configuration. I don't remember having to do that before, but is that what I need to be looking for? Thank you, Dominic L. Hilsbos, MBA Vice President - Information Technology Perform Air International Inc. DHilsbos@PerformAir.com www.PerformAir.com 1: https://docs.openstack.org/nova/victoria/admin/configuring-migrations.html#s...