ホスト名 hostname が解決できないと失敗
# virsh migrate --live guest1 qemu+ssh://192.168.0.1/system error: Unable to resolve address 'ubuntu' service '49153': Name or service not known ↓ # virsh migrate --live guest1 qemu+ssh://192.168.0.1/system tcp://192.168.0.1
Migration fails with "Unable to resolve address" error - Libvirt Wiki
恒久的なライブマイグレーション; 移行元の VM 設定を削除する場合
# virsh migrate --live --persistent --undefinesource guest1 qemu+ssh://192.168.0.1/system tcp://192.168.0.1
http://opensuse-man-ja.berlios.de/opensuse-html/cha.libvirt.admin.html
