Live migration between centos and ubuntu compute nodes

Openstack peers: I am migrating our production openstack environment from centos7 to ubuntu. I am on the train release currently, so I can have that release on both centos7 and ubuntu 18 The issue is that I need to live migrate the vms if it's possible. When I try, I get an error on the source compute node (centos 7). Live Migration failure: Cannot check QEMU binary /usr/libexec/qemu-kvm: No such file or directory: libvirtError: Cannot check QEMU binary /usr/libexec/qemu-kvm: No such file or directory Any ideas how to get around this until I get my vms migrated? Maybe create a link on the ubuntu 18 host? I'm sure I am not the first to leave centos 7 for ubuntu Thanks for any help on this.