Comment 17 for bug 1824858

Chen, can you explain why you manually moved the instance rather than using the nova cold migration? This is causing nova to take very different code paths than would normally be taken on a successful migration.

It is *not* correct behaviour for nova to leave behind files on the source node after a successful cold migration.

My working assumption is that it's something down in the guts of the nova code that behaves differently when configured with "images_type=rbd" that results in these remnants being left behind.