Below configurations have been used to work around the problem:
1. Edit /etc/nova/nova.conf on nova nodes which participate in the live
migration:
[libvirt]
rbd_user =
rbd_secret_uuid =
#live_migration_uri = qemu+ssh://%s/system
live_migration_uri = qemu+tcp://%s/system
# Disable tunnelled migration so that selective
# live block migration can be supported.
live_migration_tunnelled = True
iscsi_use_multipath = True
2. Edit /etc/libvirt/libvirtd.conf:
listen_tcp = 1
listen_addr = "0.0.0.0"
auth_tcp = "none"
3. Restart nova-compute and libvirt:
# service libvirt-bin restart
# service nova-compute restart
Meanwhile, such modifications won't work if you are using Ubuntu with
kernel 3.x like 3.13.0-100-generic I previously used - it seems there is
a kernel bug underground. Latest kernel 4.4.0-45-generic work well with
above mentioned configurations.
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https://bugs.launchpad.net/bugs/1624997
Title:
live-migration fails because of " Host key verification failed"
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