Hi, I tried to migrate a guest to another host but it failed with a message saying there's not enough capacity on the target host even though the server should me nearly empty. The guest I'm trying to move needs 4 cores, 50 GB of disk and 4 GB of memory. osuser@controller:~$ openstack server migrate --block-migration --live compute1 e896652e-1a0d-46dd-b40f-c04285bd8958 No valid host was found. Unable to move instance e896652e-1a0d-46dd-b40f-c04285bd8958 to host compute1. There is not enough capacity on the host for the instance. (HTTP 400) (Request-ID: req-02128b04-c980-4245-a2c5-af20fe715648) In /var/log/nova/nova-conductor.log I can see that the problem is the disk usage: 2018-07-10 12:42:53.218 61212 WARNING nova.scheduler.client.report [req-02128b04-c980-4245-a2c5-af20fe715648 d375a9c2aa544cd7a8d89cd1e8a93210 04a697566bc646e39d2f7ee1563e8ee0 - default default] Unable to submit allocation for instance e896652e-1a0d-46dd-b40f-c04285bd8958 (409   409 Conflict   409 Conflict There was a conflict when trying to…