<div dir="ltr">That is certainly a potential problem.<br></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Wed, Aug 7, 2013 at 2:13 AM, Zhang, Kimi (NSN - CN/Cheng Du) <span dir="ltr"><<a href="mailto:kimi.zhang@nsn.com" target="_blank">kimi.zhang@nsn.com</a>></span> wrote:<br>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Yes, that’s a valid scenario.
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">I am just wondering the VM status from nova api is not “fully” reliable, if some 3<sup>rd</sup> party tools reply on this to manage VM lifecycle/HA/scaling,
they will run into troubles…<u></u><u></u></span></p><div class="im">
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Kimi Zhang<u></u><u></u></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><a href="tel:%2B86%20186%200800%208182" value="+8618608008182" target="_blank">+86 186 0800 8182</a><u></u><u></u></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> ext matt [mailto:<a href="mailto:matt@nycresistor.com" target="_blank">matt@nycresistor.com</a>]
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<b>Sent:</b> Wednesday, August 07, 2013 3:19 PM<br>
<b>To:</b> Zhang, Kimi (NSN - CN/Cheng Du)<br>
<b>Cc:</b> <a href="mailto:openstack-operators@lists.openstack.org" target="_blank">openstack-operators@lists.openstack.org</a><br>
<b>Subject:</b> Re: [Openstack-operators] VM status keeps ACTIVE after its nova-compute host is powered off<u></u><u></u></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">imagine a scenario in which rabbitmq were to fail to poll the nova-compute service and put the system into an inactive state... yet, the instances were still up and operating as expected.<u></u><u></u></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">i am not sure there is a way for openstack to ensure down or up in the scenario in which message bus communications are severed. so i don't see a benefit either assuming down or coasting with previous values
until otherwise updated.<u></u><u></u></p>
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<p class="MsoNormal">-matt<u></u><u></u></p>
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<p class="MsoNormal">On Wed, Aug 7, 2013 at 12:11 AM, Zhang, Kimi (NSN - CN/Cheng Du) <<a href="mailto:kimi.zhang@nsn.com" target="_blank">kimi.zhang@nsn.com</a>> wrote:<u></u><u></u></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Hi,
</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Currently if a nova-compute host is down not gracefully, e.g. a power cut. Its hosting VMs still
have ACTIVE status in Database.</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Even though nova knows the compute node is down, it does nothing to VMs status.</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Should Nova be improved to update those VMs status to something else(e.g. ERROR) other than confusing
“ACTIVE” ??</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p>
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<span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p>
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<span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Kimi Zhang</span><u></u><u></u></p>
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<span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><a href="tel:%2B86%20186%200800%208182" target="_blank">+86 186 0800 8182</a></span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p>
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