<div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Dec 6, 2017 at 12:30 PM, Nicolas Ecarnot <span dir="ltr"><<a href="mailto:nicolas@ecarnot.net" target="_blank">nicolas@ecarnot.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><span class="gmail-">Le 06/12/2017 à 11:21, Nathanaël Blanchet a écrit :<br>
</span><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><span class="gmail-">
Hi all,<br>
<br>
I'm about to lose one very important vm. I shut down this vm for maintenance and then I moved the four disks to a new created lun. This vm has 2 snapshots.<br>
<br>
After successful move, the vm refuses to start with this message:<br>
<br>
Bad volume specification {u'index': 0, u'domainID': u'961ea94a-aced-4dd0-a9f0-266c<wbr>e1810177', 'reqsize': '0', u'format': u'cow', u'bootOrder': u'1', u'discard': False, u'volumeID': u'a0b6d5cb-db1e-4c25-aaaf-1bbe<wbr>e142c60b', 'apparentsize': '<a href="tel:(214)%20748-3648" value="+12147483648" target="_blank">2147483648</a>', u'imageID': u'4a95614e-bf1d-407c-aa72-2df4<wbr>14abcb7a', u'specParams': {}, u'readonly': u'false', u'iface': u'virtio', u'optional': u'false', u'deviceId': u'4a95614e-bf1d-407c-aa72-2df4<wbr>14abcb7a', 'truesize': '<a href="tel:(214)%20748-3648" value="+12147483648" target="_blank">2147483648</a>', u'poolID': u'48ca3019-9dbf-4ef3-98e9-0810<wbr>5d396350', u'device': u'disk', u'shared': u'false', u'propagateErrors': u'off', u'type': u'disk'}.<br>
<br>
I tried to merge the snaphots, export , clone from snapshot, copy disks, or deactivate disks and every action fails when it is about disk.<br>
<br>
I began to dd lv group to get a new vm intended to a standalone libvirt/kvm, the vm quite boots up but it is an outdated version before the first snapshot. There is a lot of disks when doing a "lvs | grep 961ea94a" supposed to be disks snapshots. Which of them must I choose to get the last vm before shutting down? I'm not used to deal snapshot with virsh/libvirt, so some help will be much appreciated.<br></span></blockquote></blockquote><div><br></div><div>The disks which you want to copy should contain the entire volume chain.</div><div>Based on the log you mentioned, It looks like this image is problematic:</div><div><br></div><div> storage id: '961ea94a-aced-4dd0-a9f0-266c<wbr>e1810177',</div><div> imageID': u'4a95614e-bf1d-407c-aa72-2df4<wbr>14abcb7a<br></div><div> volumeID': u'a0b6d5cb-db1e-4c25-aaaf-1bbe<wbr>e142c60b'</div><div><br></div><div>What if you try to deactivate this image and try to run the VM, will it run?</div><div><br></div><div><br></div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><span class="gmail-">
<br>
Is there some unknown command to recover this vm into ovirt?<br>
<br>
Thank you in advance.<br>
<br>
<br></span></blockquote></blockquote><div><br></div><div><br></div><div><br></div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><span class="gmail-">
<br></span>
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</blockquote>
<br>
Beside specific oVirt answers, did you try to get informations about the snapshot tree with qemu-img info --backing-chain on the adequate /dev/... logical volume?<br>
As you know how to dd from LVs, you could extract every needed snapshots files and rebuild your VM outside of oVirt.<br>
Then take time to re-import it later and safely.<span class="gmail-HOEnZb"><font color="#888888"><br>
<br>
-- <br>
Nicolas ECARNOT<br>
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