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Hi Darragh,

Thank you for your advise! It worked like a charm!

That's it, after adding:

root at hyperstack-1:~# cat /etc/init/neutron-ovs-cleanup.conf
start on starting nova-compute or neutron-plugin-openvswitch-agent
script
  /usr/bin/neutron-ovs-cleanup
end script

Compute Node can be rebooted and all its Instances, gets its IPs
immediately after node restarts.

Thanks!!!
Thiago


On 19 November 2013 08:01, Darragh O'Reilly <dara2002-openstack at yahoo.com>wrote:

> Hi Thiago,
>
> I did a qucik test with Havana on Ubuntu 12.04 with QEMU, OVS 1.10.2 and
> the OVS hybrid driver. Started an instance, rebooted the compute node, and
> the instance goes to status STOPPED. Then ran 'nova start instance-name',
> and it starts ok, but DHCP does not work.
>
> In the logs I see OVS starting first and recreating the qvoxxxxxx-xx port
> and interface from its database. Then nova-compute starts and creates the
> qbr Linux bridge and qvb interface, but it is not recreating the  qvo port
> and interface because they already exist.  Everything looks ok, and the
> DHCP requests are getting to qvo, but they are not getting into br-int.
>
> It seems the qvo interface needs to be created by Nova (using the ip
> command) before the OVS port is created with the same name. Otherwise OVS
> does not seem to enslave the interface.
>
> I added this upstart script to run cleanup which will delete the ports on
> br-int before nova-compute and the OVS agent start:
>
> root at compute1:~# cat /etc/init/neutron-ovs-cleanup.conf
> start on starting nova-compute or neutron-plugin-openvswitch-agent
> script
>   /usr/bin/neutron-ovs-cleanup
> end script
>
> Now nova-compute has to recreate everything, and the instance is getting
> an IP with DHCP. Maybe you can try this out in your test environment.
>
> Re, Darragh.
>
>
>
> >Guys,
> >
> >My Havana (Ubuntu based) Compute Node was restarted and lots of Instances
> >does not get an IP anymore.
> >
> >Tips?!
> >
> >It is ramdom, I mean, some instances of this same compute node are normal,
> >while others have no IP.
> >
> >I really need help here because my client's web site is completely off
> line
> >now...
> >
> >I'm using Per-Tenant router with private networks + VXLAN.
> >
> >Tks!
> >Thiago
>
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