openstack team mailing list archive

[Sandy Walsh <sandy.walsh@xxxxxxxxxxxxx>]

I believe '.exists' is sent via a periodic update in compute.manager.



On 03/27/2012 12:08 PM, Leander Bessa wrote:
> Hello, 
> 
> I've been following this topic and i've been trying to receive the
> notifications directly from rabbitmq with python+pika. So i far
> i've managed to receive the start/terminate events and everything in
> between. What i am unable to find though is the topic regarding
> _compute.instance.exists_
> from http://wiki.openstack.org/SystemUsageData. Does this even exist, or
> is there some extra configuration required with nova?
> 
> Regards,
> 
> Leander
> 
> On Mon, Mar 26, 2012 at 4:54 PM, Russell Bryant <rbryant@xxxxxxxxxx
> <mailto:rbryant@xxxxxxxxxx>> wrote:
> 
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>     On 03/26/2012 11:48 AM, Russell Bryant wrote:
>     > On 03/26/2012 10:15 AM, Rogério Vinhal Nunes wrote:
>     >> Hello,
>     >>
>     >> I'm developing a application to work along with openstack. My
>     >> application needs to keep track of all instances being started
>     >> or terminated such as feeding it information about the location,
>     >> status and other information about launched and terminated
>     >> instances. The current version makes timed queries to OpenStack
>     >> database, but this is showing to be a little consuming and
>     >> inefficient, so I would like to add a portion of code to make
>     >> OpenStack actively feed my application information whenever an
>     >> instance changes its status or location.
>     >>
>     >> What is the least intrusive way to do that? It would be very nice
>     >> if OpenStack provided a way to run code on these situations
>     >> without actually changing any code, such as defining a directory
>     >> of scripts to run in every instance status change.
>     >
>     > Check out the notifications system:
>     >
>     > http://wiki.openstack.org/NotificationSystem
>     >
> 
>     That wasn't the page I thought it was ... I meant:
> 
>        http://wiki.openstack.org/SystemUsageData
> 
>     You can consume these events via AMQP if you configure nova to use the
>     rabbit notifier.
> 
>     - --
>     Russell Bryant
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