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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">The instance path is assumed to be the same everywhere. When using libvirt to do cold migration/resize the source host creates the instance directory on the target
host using ssh and then copies the files to it using scp. So the target host doesn’t even get to determine where its own files are created. (note: this is one of the security flaws we intend to remove in the libvirt storage pools work).<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Michael Still [mailto:mikal@stillhq.com]
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<b>Sent:</b> 04 May 2016 06:16<br>
<b>To:</b> OpenStack Development Mailing List (not for usage questions) <openstack-dev@lists.openstack.org><br>
<b>Subject:</b> Re: [openstack-dev] [nova] Should be instance_dir in all nova compute node same ?<o:p></o:p></span></p>
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<p class="MsoNormal">I can't think of a reason. In fact its a bit warty because we've changed the way we name the instance directories at least once. Its just how this code was written back in the day.<o:p></o:p></p>
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<p class="MsoNormal">Cleaning this up would be a fair bit of work though. Is it really worth the effort just so people can have different directory names for some undefined reason?<o:p></o:p></p>
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<p class="MsoNormal">Michael<o:p></o:p></p>
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<p class="MsoNormal">On Wed, May 4, 2016 at 9:03 AM, Ghe Rivero <<a href="mailto:ghe.rivero@gmail.com" target="_blank">ghe.rivero@gmail.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">Is there any specific reason why this is require that way? or just a "feature"?<span style="color:#888888"><br>
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<span class="hoenzb">Ghe Rivero</span></span><o:p></o:p></p>
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<p class="MsoNormal">On 03/05/16 11:42, Matthew Booth wrote:<o:p></o:p></p>
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<p class="MsoNormal">On Fri, Apr 29, 2016 at 2:47 AM, Eli Qiao <<a href="mailto:liyong.qiao@intel.com" target="_blank">liyong.qiao@intel.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">hi team,<br>
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Is there any require that all compute node's instance_dir should be same?<o:p></o:p></p>
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<p class="MsoNormal">Yes. This is assumed in many places, certainly in cold migration/resize.<o:p></o:p></p>
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<p class="MsoNormal">Matt<o:p></o:p></p>
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<p class="MsoNormal">-- <o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:9.5pt">Matthew Booth</span><o:p></o:p></p>
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<p class="MsoNormal">Red Hat Engineering, Virtualisation Team<o:p></o:p></p>
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<p class="MsoNormal">Phone: <a href="tel:%2B442070094448" target="_blank">+442070094448</a> (UK)<o:p></o:p></p>
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<pre>__________________________________________________________________________<o:p></o:p></pre>
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