[Openstack] migrate instances to another openstack environment

Brian Rosmaita rosmaita.fossdev at gmail.com
Fri Mar 3 17:46:14 UTC 2017

On 3/1/17 6:25 PM, Manuel Sopena Ballesteros wrote:
> Hi,
> I am having a hard time trying to migrate my instances to another openstack installation.
> My understanding is that I could do instance --> snapshot --> image and then migrate this image to another openstack
> I started following this document (https://docs.openstack.org/user-guide/cli-use-snapshots-to-migrate-instances.html) but the image I get downloaded using "glance image-download" command has 0 size which doesn't sounds right.

The zero-size image does not sound correct ... unless there's actually
no data stored in glance because the snapshot did not complete properly
or something.  Check the output of either 'glance image-show <UUID>' or
'openstack image show <UUID>' to make sure that the image size is
nonzero and that the image status is 'active'.  Otherwise something went
wrong during the snapshot process.

If Glance reports the image as having a size and being active, you could
add the --debug flag when you download the image.  That might give you
more information to troubleshoot with.

> I was wondering whether I am doing something wrong or I am following the wrong instructions, unfortunately I haven't been able to find another documentation and #openstack at the iRC channel has not helped me either.
> Could someone guide me on how to migrate an instance?
> Thank you very much
> Manuel Sopena Ballesteros | Big data Engineer
> Garvan Institute of Medical Research
> The Kinghorn Cancer Centre, 370 Victoria Street, Darlinghurst, NSW 2010
> T: + 61 (0)2 9355 5760 | F: +61 (0)2 9295 8507 | E: manuel.sb at garvan.org.au<mailto:manuel.sb at garvan.org.au>
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