Logical Volume migration to a New Openstack environment
eblock at nde.ag
Wed Jan 5 14:18:05 UTC 2022
You can import both image files (OS and LVM) into ceph with rbd
import, then use 'cinder manage' to make them available as volumes.
Then create a new instance from volume and attach the second volume to
it. That should work without having to create glance images first.
Zitat von Sean Mooney <smooney at redhat.com>:
> On Wed, 2022-01-05 at 16:24 +0530, KK CHN wrote:
>> I am in need to migrate a Virtual machine ( running in an old OpenStack
>> environment with only one controller). This VM has its own disk file + a
>> logical volume attached to it with application data on it. Only Cinder
>> backend( No rbd/ceph backend configured ) for this environment.
>> Now I am migrating this Virtual machine to another OpenStack(ussuri with
>> three controllers, three compute nodes and three storage nodes) environment
>> with ceph/rbd backend.
>> I am able to export the VM with its disk file and import it to the other
>> openstack environment and able to boot the machine.
>> But How to export the attached logical volume from the old VM and attach
>> to the VM in the other environment ?
> if its just a singel vm you can convert teh volume to an image then
> download and upload it to the
> the new cloud and finally create a volume form that image.
> if you have to do this wiht more then one vm you might want to look at
> which is being created to automate migrating workloads betwen clouds
> it will copy the volume in a more efficent way by directly copying
> the data form the source could to the destination witout creating
>> what is the methodology to follow to export this logical volume in the
>> old openstack VM and import to the new VM running in the other openstack
>> environment ?
> the manual procedure is to convert it to a glance image and download
> and upload it. that only works if glance is not useing volume backed
> os-migrate will create a migration vm in each cloud, detach the
> volume from its current vm on the source cloud then attach it to the
> migration vm
> on the dest cloud it will create a new empty volume and attch it to
> the might vm.
> then it basicly rsyncs the datat from one migration vm to the other.
>> kindly share your suggestions/expertise to perform this
>> Thanks in advance for your valuable guidance.
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