Did not find the volume after live_migration

[warewang]

I migration the VM to another host, but there is a error occured when source host excute the driver's live_migration. In the live_migration process, the BDM was detach from source host and attach int dest, after this step , the error occres, the nova-compute rollback the BDM, it detach in dest, but didn't attach in source host.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/119677

[OpenStack Infra (hudson-openstack)]

Change abandoned by warewang (<email address hidden>) on branch: master
Review: https://review.openstack.org/119677

[Eli Qiao (taget-9)]

hello , by looking at the live-migration process carefully, I don't think we have enough information to go with this patch:

if the live-migration process start, it will have 3 stages:

1 pre_live_migration:
    will setup network, plug VIF, and connect BDM if has. if error happened, will call roll_back process to revert dest host's status.
2 live_migration process:
    call libvirt to do live_migration process, if error happened, will call roll_back process to revert dest host's status.
3 post_live_migration process
    source bdm only will disconnect in this stage, is error happened, there is nothing to do with this instance, since the host has been
moved to dest host.

Since we don't detach source's hosts's BDM in the live-migration process, so we don't need to re-attach it if exception happened.

Eli.

[lvmxh (shaohef)]

agree with Eli.

Need more information.

[Markus Zoeller (markus_z) (mzoeller)]

Cleanup
=======

This bug report has the status "Incomplete" since more than 30 days
and it looks like that there are no open reviews for it. To keep
the bug list sane, I close this bug with "won't fix". This does not
mean that it is not a valid bug report, it's more to acknowledge that
no progress can be expected here anymore. You are still free to push a
new patch for this bug. If you could reproduce it on the current master
code or on a maintained stable branch, please switch it to "Confirmed".