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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I ran into some similar issues with the _<i>enable</i>_hairpin() call. The call is allowed to fail silently and (in my case) was failing. I couldn’t for the
life of me figure out why, though, and since I’m really not a networking person I didn’t trace it along too far.<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">Just thought I’d share my similar pain.<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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<![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Gabriel<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"><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""> openstack-bounces+gabriel.hurley=nebula.com@lists.launchpad.net [mailto:openstack-bounces+gabriel.hurley=nebula.com@lists.launchpad.net]
<b>On Behalf Of </b>Sam Su<br>
<b>Sent:</b> Thursday, July 19, 2012 11:50 AM<br>
<b>To:</b> Brian Haley<br>
<b>Cc:</b> openstack<br>
<b>Subject:</b> Re: [Openstack] VM can't ping self floating IP after a snapshot is taken<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Thank you for your support.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I checked the file nova/virt/libvirt/connection.py, the sentence self._enable_hairpin(instance) is already added to the function _hard_reboot().<o:p></o:p></p>
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<p class="MsoNormal">It looks like there are some difference between taking snapshot and reboot instance. I tried to figure out how to fix this bug but 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">It will be much appreciated if anyone can give some hints.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Thanks,<o:p></o:p></p>
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<p class="MsoNormal">Sam<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><o:p> </o:p></p>
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<p class="MsoNormal">On Thu, Jul 19, 2012 at 8:37 AM, Brian Haley <<a href="mailto:brian.haley@hp.com" target="_blank">brian.haley@hp.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">On 07/17/2012 05:56 PM, Sam Su wrote:<br>
> Hi,<br>
><br>
> Just This always happens in Essex release. After I take a snapshot of my VM ( I<br>
> tried Ubuntu 12.04 or CentOS 5.8), VM can't ping its self floating IP; before I<br>
> take a snapshot though, VM can ping its self floating IP.<br>
><br>
> This looks closely related to <a href="https://bugs.launchpad.net/nova/+bug/933640" target="_blank">
https://bugs.launchpad.net/nova/+bug/933640</a>, but<br>
> still a little different. In 933640, it sounds like VM can't ping its self<br>
> floating IP regardless whether we take a snapshot or not.<br>
><br>
> Any suggestion to make an easy fix? And what is the root cause of the problem?<o:p></o:p></p>
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<p class="MsoNormal">It might be because there's a missing _enable_hairpin() call in the reboot()<br>
function. Try something like this...<br>
<br>
nova/virt/libvirt/connection.py, _hard_reboot():<br>
<br>
self._create_new_domain(xml)<br>
+ self._enable_hairpin(instance)<br>
self.firewall_driver.apply_instance_filter(instance, network_info)<br>
<br>
At least that's what I remember doing myself recently when testing after a<br>
reboot, don't know about snapshot.<br>
<br>
Folsom has changed enough that something different would need to be done there.<br>
<span style="color:#888888"><br>
<span class="hoenzb">-Brian</span></span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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