[openstack-dev] [Fuel][Pacemaker][HA] Notifying clones of offline nodes
mscherbakov at mirantis.com
Thu Jun 12 09:25:00 UTC 2014
> I hoped that they would hit "Reply All" button
they might hit it, but if someone is not subscribed to openstack-dev, then
the message won't be posted as far as I know.
Likely, mine won't be posted in pacemaker ML as I'm not subscribed to that
On Thu, Jun 12, 2014 at 1:23 AM, Vladimir Kuklin <vkuklin at mirantis.com>
> Hi, Jay
> Yep. Here is the link to mail archive (I hoped that they would hit "Reply
> All" button):
> Actually, this is what Mirantis Linux Hardening team could do, I hope, in
> this release cycle and push it to upstream.
> On Thu, Jun 12, 2014 at 2:44 AM, Jay Pipes <jaypipes at gmail.com> wrote:
>> On 05/26/2014 11:16 AM, Vladimir Kuklin wrote:
>>> Hi all
>>> We are working on HA solutions for OpenStack(-related) services and
>>> figured out that sometimes we need clones to be notified if one of the
>>> cluster nodes running clone instances goes offline. E.g., we need this
>>> information to make RabbitMQ AMQP broker cluster to forget this node
>>> until it goes up again. This is easily achievable if we stop the
>>> instance on the node - then notification is sent to clone instances and
>>> everything is fine. But what can we do if node goes offline
>>> unexpectedly? Is there any way to notify other clones that the slave is
>>> dead and perform corresponding actions?
>>> One of the ways we figured out is to implement additional cluster
>>> monitoring action in resource OCF and purge "dead" nodes, but it looks a
>>> little bit overwhelming and inconvenient. Is there a chance we missed
>>> some attributes that allow configuration of such behaviour that
>>> pacemaker notifies other clones on node offline/fence/cold_shutdown ?
>> Ping. Hi Vladimir, did you ever get any response about this? I'm also
>> interested in the answers...
>> OpenStack-dev mailing list
>> OpenStack-dev at lists.openstack.org
> Yours Faithfully,
> Vladimir Kuklin,
> Fuel Library Tech Lead,
> Mirantis, Inc.
> +7 (495) 640-49-04
> +7 (926) 702-39-68
> Skype kuklinvv
> 45bk3, Vorontsovskaya Str.
> Moscow, Russia,
> www.mirantis.com <http://www.mirantis.ru/>
> vkuklin at mirantis.com
> OpenStack-dev mailing list
> OpenStack-dev at lists.openstack.org
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