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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi Sisu,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal">2014-06-05 16:33:27.509 TRACE nova.api.openstack.compute.contrib.admin_actions File "/opt/stack/nova/nova/virt/xenapi/vmops.py", line 1840, in check_can_live_migrate_source<o:p></o:p></p>
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<p class="MsoNormal">2014-06-05 16:33:27.509 TRACE nova.api.openstack.compute.contrib.admin_actions raise exception.MigrationPreCheckError(reason=msg)<o:p></o:p></p>
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<p class="MsoNormal">2014-06-05 16:33:27.509 TRACE nova.api.openstack.compute.contrib.admin_actions<o:p></o:p></p>
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<p class="MsoNormal">2014-06-05 16:33:27.509 TRACE nova.api.openstack.compute.contrib.admin_actions MigrationPreCheckError: Migration pre-check error: VM.assert_can_migrate failed<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">The strange thing is sometimes it will migrate, but sometimes it cannot...<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Can anyone help me with this? Why would the VM.assert_can_migrate fail?<o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">The most typical failure in assert_can_migrate is around the compatability of the two host CPUs. If they are different CPUs then they most likely support different
feature sets. When you have a VM it can only be migrated to a host if that new host has _<i>at least</i>_ all of the features that are available on the current host.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Check out
<a href="http://support.citrix.com/article/CTX127059">http://support.citrix.com/article/CTX127059</a> - while OpenStack does not use pools, live migration depends on the same things, so setting cupid_feature_mask may allow the migration to succeed.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">If this is not the issue, check /var/log/xensource.log for details on why XAPI determined that the VM cannot be live migrated.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Bob
<o:p></o:p></span></p>
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