<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Look at comment #2, it’s me.<br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Nov 2, 2017, at 11:34 AM, Sergio Cuellar Valdes <<a href="mailto:scuellarv@kionetworks.com" class="">scuellarv@kionetworks.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class=""><div class="gmail_default" style="font-family:verdana,sans-serif">Hi Mike,</div><div class="gmail_default" style="font-family:verdana,sans-serif"><br class=""></div><div class="gmail_default" style="font-family:verdana,sans-serif">Which version of OpenStack are you using ? Do the normal migrations work ? </div><div class="gmail_default" style="font-family:verdana,sans-serif"><br class=""></div><div class="gmail_default" style="font-family:verdana,sans-serif">I found a bug that looks like your problem [1]</div><div class="gmail_default" style="font-family:verdana,sans-serif"><br class=""></div><div class="gmail_default" style="font-family:verdana,sans-serif">[1] <a href="https://bugs.launchpad.net/nova/+bug/1715569" class="">https://bugs.launchpad.net/nova/+bug/1715569</a></div><div class="gmail_default" style="font-family:verdana,sans-serif"><br class=""></div><div class="gmail_default" style="font-family:verdana,sans-serif">Cheers,</div><div class="gmail_default" style="font-family:verdana,sans-serif">Sergio</div></div><div class="gmail_extra"><br class=""><div class="gmail_quote">On 2 November 2017 at 08:48, Mike Lowe <span dir="ltr" class=""><<a href="mailto:jomlowe@iu.edu" target="_blank" class="">jomlowe@iu.edu</a>></span> wrote:<br class=""><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">After moving from CentOS 7.3 to 7.4, I’ve had trouble getting live migration to work when a volume is attached. As it turns out when a live migration takes place the libvirt driver rewrites portions of the xml definition for the destination hypervisor and gets it wrong. Here is an example.<br class="">
<br class="">
It turns this:<br class="">
<br class="">
disk device="disk" type="network"><br class="">
<driver cache="writeback" name="qemu" type="raw"/><br class="">
<auth username="cinder"><br class="">
<secret type="ceph" uuid="1a790a26-dd49-4825-8d16-<wbr class="">3dd627cf05a9"/><br class="">
</auth><br class="">
<source name="cinder-volumes/volume-<wbr class="">de400476-b68a-45a2-b04f-<wbr class="">739313f42bef" protocol="rbd"><br class="">
<host name="172.16.128.101" port="6789"/><br class="">
<host name="172.16.128.121" port="6789"/><br class="">
<host name="172.16.128.130" port="6789"/><br class="">
</source><br class="">
<target bus="scsi" dev="sdb"/><br class="">
<serial>de400476-b68a-45a2-<wbr class="">b04f-739313f42bef</serial><br class="">
<address bus="0" controller="0" target="0" type="drive" unit="1"/><br class="">
</disk><br class="">
<br class="">
Into this:<br class="">
<br class="">
<disk device="disk" type="network"><br class="">
<driver cache="writeback" name="qemu" type="raw"/><br class="">
<auth username="cinder"><br class="">
<secret type="ceph" uuid="1a790a26-dd49-4825-8d16-<wbr class="">3dd627cf05a9"/><br class="">
</auth><br class="">
<source name="cinder-volumes/volume-<wbr class="">de400476-b68a-45a2-b04f-<wbr class="">739313f42bef" protocol="rbd"><br class="">
<host name="172.16.128.101" port="6789"/><br class="">
<host name="172.16.128.121" port="6789"/><br class="">
<host name="172.16.128.130" port="6789"/><br class="">
</source><br class="">
<target bus="scsi" dev="sdb"/><br class="">
<serial>de400476-b68a-45a2-<wbr class="">b04f-739313f42bef</serial><br class="">
<address controller="0" type="drive"/><br class="">
</disk><br class="">
<br class="">
Note the address change, libvirt will attempt to put this undefined disk at 0:0:0 which conflicts with the root disk and causes the migration to fail. While this may be a libvirt bug I can’t imagine anything good would come from changing the scsi address of your disks mid flight so steps should be taken in nova if rewriting the definition to preserve the address.<br class="">
<br class="">
Here is my question, when exactly would you want to change the definition of an attached volume?<br class="">
<br class="">
<br class="">
<br class="">
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</blockquote></div><br class=""><br clear="all" class=""><div class=""><br class=""></div>-- <br class=""><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr" class=""><div class=""><div dir="ltr" class=""><div class=""><div dir="ltr" class=""><div class=""><div dir="ltr" class=""><div class=""><div dir="ltr" class=""><div class=""><div dir="ltr" class=""><div class=""><div dir="ltr" class=""><div class=""><div dir="ltr" class=""><div dir="ltr" class=""><div dir="ltr" class=""><div dir="ltr" class=""><b class=""><font style="color:rgb(102,102,102)" face="arial, helvetica, sans-serif" class=""> Sergio Cuéllar<font style="font-weight:normal" face="arial, helvetica, sans-serif" class=""> │DevOps Engineer</font></font></b></div><div dir="ltr" class=""><font color="#666666" class=""> KIO NETWORKS<br class=""> </font><font face="arial narrow, sans-serif" class=""><span style="color:rgb(102,102,102)" class="">Mexico City Phone (52) 55 8503 2600 ext. 4335</span><br class=""></font></div><div class=""><font face="arial narrow, sans-serif" class=""><span style="color:rgb(102,102,102)" class=""> Mobile: 5544844298</span></font></div><div class=""><font face="arial narrow, sans-serif" class=""><span style="color:rgb(102,102,102)" class=""> <a href="http://www.kionetworks.com/" target="_blank" class="">www.kionetworks.com</a></span></font></div><div dir="ltr" class=""><img src="https://s3.amazonaws.com/kiofirmas/firma_a.gif" class=""><br class=""></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div>
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