openstack team mailing list archive

[Oleg Gelbukh <ogelbukh@xxxxxxxxxxxx>]

Eugene,

I suggest just add option 'rabbit_servers' that will override
'rabbit_host'/'rabbit_port' pair, if present. This won't break anything, in
my understanding.

--
Best regards,
Oleg Gelbukh
Mirantis, Inc.

On Mon, Jul 23, 2012 at 10:58 PM, Eugene Kirpichov <ekirpichov@xxxxxxxxx>wrote:

> Hi,
>
> I'm working on a RabbitMQ H/A patch right now.
>
> It actually involves more than just using H/A queues (unless you're
> willing to add a TCP load balancer on top of your RMQ cluster).
> You also need to add support for multiple RabbitMQ's directly to nova.
> This is not hard at all, and I have the patch ready and tested in
> production.
>
> Alessandro, if you need this urgently, I can send you the patch right
> now before the discussion codereview for inclusion in core nova.
>
> The only problem is, it breaks backward compatibility a bit: my patch
> assumes you have a flag "rabbit_addresses" which should look like
> "rmq-host1:5672,rmq-host2:5672" instead of the prior rabbit_host and
> rabbit_port flags.
>
> Guys, can you advise on a way to do this without being ugly and
> without breaking compatibility?
> Maybe have "rabbit_host", "rabbit_port" be ListOpt's? But that sounds
> weird, as their names are in singular.
> Maybe have "rabbit_host", "rabbit_port" and also "rabbit_host2",
> "rabbit_port2" (assuming we only have clusters of 2 nodes)?
> Something else?
>
> On Mon, Jul 23, 2012 at 11:27 AM, Jay Pipes <jaypipes@xxxxxxxxx> wrote:
> > On 07/23/2012 09:02 AM, Alessandro Tagliapietra wrote:
> >> Hi guys,
> >>
> >> just an idea, i'm deploying Openstack trying to make it HA.
> >> The missing thing is rabbitmq, which can be easily started in
> >> active/active mode, but it needs to declare the queues adding an
> >> x-ha-policy entry.
> >> http://www.rabbitmq.com/ha.html
> >> It would be nice to add a config entry to be able to declare the queues
> >> in that way.
> >> If someone know where to edit the openstack code, else i'll try to do
> >> that in the next weeks maybe.
> >
> >
> https://github.com/openstack/openstack-common/blob/master/openstack/common/rpc/impl_kombu.py
> >
> > You'll need to add the config options there and the queue is declared
> > here with the options supplied to the ConsumerBase constructor:
> >
> >
> https://github.com/openstack/openstack-common/blob/master/openstack/common/rpc/impl_kombu.py#L114
> >
> > Best,
> > -jay
> >
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>
>
> --
> Eugene Kirpichov
> http://www.linkedin.com/in/eugenekirpichov
>
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