<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">That’s pretty interesting. I haven’t seen that before, tbh, I had been using gridcentric for live migrations in grizzly, but that’s just because we didn’t have shared storage.<div>So, the instance is what is generating the load, right? anything interesting on the console log? I wonder if there is some time-sync issue that’s going haywire when it lands on the new host.</div><div>But now I’m just speculating. </div><div><br><div><div>On Sep 12, 2014, at 10:13 AM, Stephen Cousins <<a href="mailto:steve.cousins@maine.edu">steve.cousins@maine.edu</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div dir="ltr"><div class="gmail_default" style="font-family:courier new,monospace">Hi Abel,</div><div class="gmail_default" style="font-family:courier new,monospace"><br></div><div class="gmail_default" style="font-family:courier new,monospace">I just tried and it did the same thing. Load went up to 800 and the VM is unreachable. </div><div class="gmail_default" style="font-family:courier new,monospace"><br></div><div class="gmail_default" style="font-family:courier new,monospace">Any ideas?</div><div class="gmail_default" style="font-family:courier new,monospace"><br></div><div class="gmail_default" style="font-family:courier new,monospace">Thanks,</div><div class="gmail_default" style="font-family:courier new,monospace"><br></div><div class="gmail_default" style="font-family:courier new,monospace">Steve</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Sep 12, 2014 at 12:59 PM, Abel Lopez <span dir="ltr"><<a href="mailto:alopgeek@gmail.com" target="_blank">alopgeek@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Does it work if you first detach the volume and then migrate?<div class="HOEnZb"><div class="h5"><span></span><br><br>On Friday, September 12, 2014, Stephen Cousins <<a href="mailto:steve.cousins@maine.edu" target="_blank">steve.cousins@maine.edu</a>> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_default" style="font-family:courier new,monospace">I am fairly new to Openstack having just inherited a Grizzly system with NFS storage. "nova live-migration" is working unless the VM has an attached volume. When it doesn't work, the VM does move but it is not possible to connect to it and the CPU load on that VM goes up to the number of cores assigned to it. That is, for a VM with 8 cores in it, the load for that qemu-system-x86_64 process goes up to about 800%. Is this a known problem with Grizzly? <br></div><div class="gmail_quote"><div dir="ltr"><div class="gmail_default" style="font-family:'courier new',monospace"><br></div><div class="gmail_default" style="font-family:'courier new',monospace">Here is a description of our system:</div><div class="gmail_default" style="font-family:'courier new',monospace"><br></div><div class="gmail_default" style="font-family:'courier new',monospace"> three machines set up with HA for Quantum (with Open vSwitch), Cinder, RabbitMQ, and Nova. These nodes are all compute nodes too. We also have another machine that is just compute. </div><div class="gmail_default" style="font-family:'courier new',monospace"><br></div><div class="gmail_default" style="font-family:'courier new',monospace">Cinder and Glance storage is all NFS connected to each machine with the same mount points. </div><div><br></div><div><span style="font-family:'courier new',monospace">The command I am using to do the migration is:</span></div><div><span style="font-family:'courier new',monospace"><br></span></div><div><span style="font-family:'courier new',monospace"> nova live-migration $UUID compute3</span><br></div><div><span style="font-family:'courier new',monospace"><br></span></div><div><span style="font-family:'courier new',monospace">In some cases the migration has worked when a volume has been attached. Most of the time however, it does not work. </span></div><div><span style="font-family:'courier new',monospace"><br></span></div><div><span style="font-family:'courier new',monospace">Thanks,</span></div><div><span style="font-family:'courier new',monospace"><br></span></div><div><span style="font-family:'courier new',monospace">Steve</span></div><span><font color="#888888"><br></font></span></div></div>-- <br><span style="font-family:courier new,monospace">________________________________________________________________</span><br style="font-family:courier new,monospace"><span style="font-family:courier new,monospace"> Steve Cousins Supercomputer Engineer/Administrator</span><br style="font-family:courier new,monospace"><span style="font-family:courier new,monospace"> Advanced Computing Group University of Maine System</span><br style="font-family:courier new,monospace"><span style="font-family:courier new,monospace"> 244 Neville Hall (UMS Data Center) <a href="tel:%28207%29%20561-3574" value="+12075613574" target="_blank">(207) 561-3574</a></span><br style="font-family:courier new,monospace"><span style="font-family:courier new,monospace"> Orono ME 04469 steve.cousins at <a href="http://maine.edu/" target="_blank">maine.edu</a></span><br><br>
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</div></div></blockquote></div><br><br clear="all"><div><br></div>-- <br><span style="font-family:courier new,monospace">________________________________________________________________</span><br style="font-family:courier new,monospace"><span style="font-family:courier new,monospace"> Steve Cousins Supercomputer Engineer/Administrator</span><br style="font-family:courier new,monospace"><span style="font-family:courier new,monospace"> Advanced Computing Group University of Maine System</span><br style="font-family:courier new,monospace"><span style="font-family:courier new,monospace"> 244 Neville Hall (UMS Data Center) (207) 561-3574</span><br style="font-family:courier new,monospace"><span style="font-family:courier new,monospace"> Orono ME 04469 steve.cousins at <a href="http://maine.edu/" target="_blank">maine.edu</a></span><br><br>
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