I ran into some similar issues with the _enable_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.
Just thought I'd share my similar pain. - Gabriel From: openstack-bounces+gabriel.hurley=nebula....@lists.launchpad.net [mailto:openstack-bounces+gabriel.hurley=nebula....@lists.launchpad.net] On Behalf Of Sam Su Sent: Thursday, July 19, 2012 11:50 AM To: Brian Haley Cc: openstack Subject: Re: [Openstack] VM can't ping self floating IP after a snapshot is taken Thank you for your support. I checked the file nova/virt/libvirt/connection.py, the sentence self._enable_hairpin(instance) is already added to the function _hard_reboot(). 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. It will be much appreciated if anyone can give some hints. Thanks, Sam On Thu, Jul 19, 2012 at 8:37 AM, Brian Haley <brian.ha...@hp.com<mailto:brian.ha...@hp.com>> wrote: On 07/17/2012 05:56 PM, Sam Su wrote: > Hi, > > Just This always happens in Essex release. After I take a snapshot of my VM ( > I > tried Ubuntu 12.04 or CentOS 5.8), VM can't ping its self floating IP; before > I > take a snapshot though, VM can ping its self floating IP. > > This looks closely related to https://bugs.launchpad.net/nova/+bug/933640, but > still a little different. In 933640, it sounds like VM can't ping its self > floating IP regardless whether we take a snapshot or not. > > Any suggestion to make an easy fix? And what is the root cause of the problem? It might be because there's a missing _enable_hairpin() call in the reboot() function. Try something like this... nova/virt/libvirt/connection.py, _hard_reboot(): self._create_new_domain(xml) + self._enable_hairpin(instance) self.firewall_driver.apply_instance_filter(instance, network_info) At least that's what I remember doing myself recently when testing after a reboot, don't know about snapshot. Folsom has changed enough that something different would need to be done there. -Brian
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