[Openstack] Need help - Compute Node restarted - Ramdom Instances doesn't get and IP anymore

Jian Wen jian.wen at canonical.com
Thu Nov 21 07:50:23 UTC 2013


It is https://bugs.launchpad.net/neutron/+bug/1091605

The patch fixes the above bug introduces another bug:
https://bugzilla.redhat.com/show_bug.cgi?id=1010941


On Thu, Nov 21, 2013 at 2:18 PM, Jean-Daniel BUSSY <
silversurfer972 at gmail.com> wrote:

> Nice! Thanks Thiago for the details.
> Looks like this bug should be reported.
>
> Cheers
>
>
> * BUSSY Jean-Daniel*
> Cloud Engineer | GREE
> Mobile: +81 090-3317-1337
> Email: silversurfer972 at gmail.com
>
>
> On Tue, Nov 19, 2013 at 7:01 PM, 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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>
>
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-- 
Cheers,
Jian
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