Hi, I would like to migrate a VM between two different ovirt installations with minimum down time. Using a export domain is slow (requires copying twice) and requires to stop the VM. It seems like the best option is to 1) create a snapshot, 2) transfer the backing chain images and OVF files to the destination storage domain 3) stop the VM, 4) transfer the active snapshot and 5) import the VM from the destination storage domain. Can you please comment and suggest other alternatives? Thanks.
Another way, if you have a domain to spare, would be to detach the domain containing the VM and attaching it to another setup. Otherwise, you're limited to either an export domain (which requires copying twice, as you mentioned), or some manual procedure like you suggested. ----- Original Message -----
From: "Christopher Pereira" <kripper@imatronix.cl> To: devel@ovirt.org Sent: Saturday, June 20, 2015 2:48:20 AM Subject: [ovirt-devel] Live export/import
Hi,
I would like to migrate a VM between two different ovirt installations with minimum down time.
Using a export domain is slow (requires copying twice) and requires to stop the VM.
It seems like the best option is to 1) create a snapshot, 2) transfer the backing chain images and OVF files to the destination storage domain 3) stop the VM, 4) transfer the active snapshot and 5) import the VM from the destination storage domain.
Can you please comment and suggest other alternatives?
Thanks.
_______________________________________________ Devel mailing list Devel@ovirt.org http://lists.ovirt.org/mailman/listinfo/devel
This is a multi-part message in MIME format. --------------000403020406090108090604 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Hi Allon, We are on the same track, since the additional steps I mentioned are only for reducing downtime (big backing chain images should be copied while VMs are still running and writing to a small active snapshot that would be copied at the end). I'm basically reattaching an existing storage domain (with VM and OVF_STORE disks) on another ovirt installation, but doing a copy of the storage domain, instead of detaching it from the source data center. Benefit for oVirt : Live export/import The problem is that something is missing, since the VMs are not displayed when I attach and activate the cloned storage domain on the destination data center. Maybe the detach process does something that is required to show the VMs later. Again, I'm not doing a detach, but cloning the storage domain with active VMs. I saw in the logs that oVirt is getting the OVF files from a tar file. Start fetching OVF files from tar file File 'info.json' is not an OVF file, will be ignored. Finish to fetch OVF files from tar file. The number of OVF entities are 0 _*Maybe this tar file is written by the detach process? What else could be missing?*_ I reported and shared the logs here: https://bugzilla.redhat.com/show_bug.cgi?id=1234137 On 21-06-2015 12:04, Allon Mureinik wrote:
Another way, if you have a domain to spare, would be to detach the domain containing the VM and attaching it to another setup. Otherwise, you're limited to either an export domain (which requires copying twice, as you mentioned), or some manual procedure like you suggested.
----- Original Message -----
From: "Christopher Pereira" <kripper@imatronix.cl> To: devel@ovirt.org Sent: Saturday, June 20, 2015 2:48:20 AM Subject: [ovirt-devel] Live export/import
Hi,
I would like to migrate a VM between two different ovirt installations with minimum down time.
Using a export domain is slow (requires copying twice) and requires to stop the VM.
It seems like the best option is to 1) create a snapshot, 2) transfer the backing chain images and OVF files to the destination storage domain 3) stop the VM, 4) transfer the active snapshot and 5) import the VM from the destination storage domain.
Can you please comment and suggest other alternatives?
Thanks.
_______________________________________________ Devel mailing list Devel@ovirt.org http://lists.ovirt.org/mailman/listinfo/devel
--------------000403020406090108090604 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 8bit <html> <head> <meta content="text/html; charset=utf-8" http-equiv="Content-Type"> </head> <body bgcolor="#FFFFFF" text="#000000"> Hi Allon,<br> <br> We are on the same track, since the additional steps I mentioned are only for reducing downtime (big backing chain images should be copied while VMs are still running and writing to a small active snapshot that would be copied at the end).<br> <br> I'm basically reattaching an existing storage domain (with VM and OVF_STORE disks) on another ovirt installation, but doing a copy of the storage domain, instead of detaching it from the source data center.<br> <br> Benefit for oVirt : Live export/import<br> <br> The problem is that something is missing, since the VMs are not displayed when I attach and activate the cloned storage domain on the destination data center.<br> Maybe the detach process does something that is required to show the VMs later. Again, I'm not doing a detach, but cloning the storage domain with active VMs.<br> I saw in the logs that oVirt is getting the OVF files from a tar file.<br> <br> Start fetching OVF files from tar file<br> File 'info.json' is not an OVF file, will be ignored.<br> Finish to fetch OVF files from tar file. The number of OVF entities are 0<br> <br> <u><b>Maybe this tar file is written by the detach process? What else could be missing?</b></u><br> <br> I reported and shared the logs here:<br> <a class="moz-txt-link-freetext" href="https://bugzilla.redhat.com/show_bug.cgi?id=1234137">https://bugzilla.redhat.com/show_bug.cgi?id=1234137</a><br> <br> <div class="moz-signature"> <style> .signature, .small-signature { font-family:"Calibri","sans-serif";mso-fareast-font-family:"Times New Roman"; color:#7F7F7F; } .signature { font-size:10pt; } .small-signature { font-size:8pt; }</style></div> <div class="moz-cite-prefix">On 21-06-2015 12:04, Allon Mureinik wrote:<br> </div> <blockquote cite="mid:47710768.5569550.1434899054757.JavaMail.zimbra@redhat.com" type="cite"> <pre wrap="">Another way, if you have a domain to spare, would be to detach the domain containing the VM and attaching it to another setup. Otherwise, you're limited to either an export domain (which requires copying twice, as you mentioned), or some manual procedure like you suggested. ----- Original Message ----- </pre> <blockquote type="cite"> <pre wrap="">From: "Christopher Pereira" <a class="moz-txt-link-rfc2396E" href="mailto:kripper@imatronix.cl"><kripper@imatronix.cl></a> To: <a class="moz-txt-link-abbreviated" href="mailto:devel@ovirt.org">devel@ovirt.org</a> Sent: Saturday, June 20, 2015 2:48:20 AM Subject: [ovirt-devel] Live export/import Hi, I would like to migrate a VM between two different ovirt installations with minimum down time. Using a export domain is slow (requires copying twice) and requires to stop the VM. It seems like the best option is to 1) create a snapshot, 2) transfer the backing chain images and OVF files to the destination storage domain 3) stop the VM, 4) transfer the active snapshot and 5) import the VM from the destination storage domain. Can you please comment and suggest other alternatives? Thanks. _______________________________________________ Devel mailing list <a class="moz-txt-link-abbreviated" href="mailto:Devel@ovirt.org">Devel@ovirt.org</a> <a class="moz-txt-link-freetext" href="http://lists.ovirt.org/mailman/listinfo/devel">http://lists.ovirt.org/mailman/listinfo/devel</a> </pre> </blockquote> <pre wrap=""> </pre> </blockquote> <br> </body> </html> --------------000403020406090108090604--
participants (2)
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Allon Mureinik -
Christopher Pereira