Hey folks, Was working on a bug yesterday that occurs when you are using the Neutron barclamp with the OVS plugin in GRE mode.
The issue is that when a Nova compute node is rebooted, the Neutron networking on the node comes up in a broken state, which causes networking to fail for the VMs that the compute node is hosting. It turns out that this is a known issue with Neutron (https://ask.openstack.org/en/question/4809/vm-internal-network-broken-after-compute-restart/). Evidently the OVS agent automatically adds entries to the bridge on its way up, and this is what causes Neutron networking to fail. The Neutron developers have added a script to clean these entries out during bootup of the node, but you must hook execution of this script into your compute nodes manually. I believe the script was added in the 2013.1.2 version of the Ubuntu OpenStack packages. I submitted a fix for this that will be included in our upcoming Mesa 1.6.1 release, but just thought I would let everyone know in case you run into this issue. The pull request for the fix is: https://github.com/crowbar/barclamp-quantum/pull/128 I will also be submitting a pull request to merge this fix into pebbles shortly. Thanks! Chris Dell Inc
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