Description of problem: Multi-Ephemeral instance Live Block Migration fails silently Version-Release number of selected component (if applicable): RHEL OSP 9 (Able to reproduce in test lab) other version likely impacted. How reproducible: Everytime. Steps to Reproduce: 1) Created flavor with two ephemeral support. ~~~ [root@allinone9 ~(keystone_admin)]# nova flavor-create 2ephemeral-disks 6 512 1 1 --ephemeral 2 ~~~ 2) Spawned instance using created flavor. ~~~ [root@allinone9 ~(keystone_admin)]# nova boot --flavor 2ephemeral-disks --image cirros --ephemeral size=1 --ephemeral size=1 internal1 ~~~ 3) Instance spawned successfully. ~~~ [root@allinone9 ~(keystone_admin)]# nova list --field name,status,host | grep -i internal1 | 08619d2d-e3a2-4f67-a959-33cfbc08d153 | internal1 | ACTIVE | allinone9 | ~~~ 4) Verifying that two extra ephemeral disks are connected with instance. ~~~ [root@allinone9 ~(keystone_admin)]# virsh domblklist 4 Target Source ------------------------------------------------ vda /var/lib/nova/instances/08619d2d-e3a2-4f67-a959-33cfbc08d153/disk vdb /var/lib/nova/instances/08619d2d-e3a2-4f67-a959-33cfbc08d153/disk.eph0 vdc /var/lib/nova/instances/08619d2d-e3a2-4f67-a959-33cfbc08d153/disk.eph1 ~~~ 5) Tried to perform the block migration but it end with same error which you have seen. [root@allinone9 ~(keystone_admin)]# nova live-migration 08619d2d-e3a2-4f67-a959-33cfbc08d153 compute1-9 --block-migrate ~~~ From : /var/log/nova/nova-compute.log 2016-09-26 08:53:12.033 3958 ERROR nova.compute.manager [req-f24d49f7-4d8e-4683-bcc0-952254764fca b09d7a1af46d42398c79a1dc0da02954 ca23990ed6c846b0b8d588fb5e304aeb - - -] [instance: 08619d2d-e3a2-4f67-a959-33cfbc08d153] Pre live migration failed at compute1-9 2016-09-26 08:53:12.033 3958 ERROR nova.compute.manager [instance: 08619d2d-e3a2-4f67-a959-33cfbc08d153] 2016-09-26 08:53:12.033 3958 ERROR nova.compute.manager [instance: 08619d2d-e3a2-4f67-a959-33cfbc08d153] FlavorDiskSmallerThanImage: Flavor's disk is too small for requested image. Flavor disk is 1073741824 bytes, image is 2147483648 bytes. ~~~ Actual results: Migration getting failed. Expected results: Migration should get successfully completed. Additional info:
It's a valid issue which affects upstream too. I have reported the bug and will push a fix soon. That fix should be backportable. Can you ensure to correctly set the version used ? In all case we are probably going to backport the fix on all of our supported releases so we will have to create BZ for each release of RHOS.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://rhn.redhat.com/errata/RHBA-2017-0151.html