Open Stack

Hi Julien,

Thanks for bring the discussion to boarder audience.  Looking forward
to hear feedback/suggestion.

On Mon, Nov 5, 2012 at 11:34 PM, Julien Danjou <julien at danjou.info> wrote:
> Hi,
>
> I've been working to change the actual audit code used into Cinder (but
> also in Nova) to a real-time one, so it's more useful to projects like
> Ceilometer.
>
> The implementation for Cinder is under review at:
>
>     https://review.openstack.org/#/c/15115/
>
> Once this patch got accepted, I intend to port it to Nova in the same
> fashion.
>
> Now, Huang Zhiteng raises an issue that might also interest Nova team,
> so I'm bringing this to this list.
>
> My patch plugs the audit in a periodic task under the cinder-volume
> daemon, since this is the one making more sense for cinder. For Nova,
> that would probably be nova-compute.
> The concern is that sending exists notifications might take too long and
> blocks the daemon for too much time.
>
> From my point of view, since each host is only sending notifications
> about volumes (in Nova that would be instances) it handles, this is not
> going to be a lot of them, and that shouldn't take the daemon too long
> nor block it for a while. Compared to the burden of shipping another
> daemon.
>
> Also, while I'm at it, suggestions about a default auditing rate might
> be welcome, since the default periodic_interval (60s) might be a little
> too low. Maybe using ticks_between_runs would be a good idea?
>
> --
> Julien Danjou
> # Free Software hacker & freelance
> # http://julien.danjou.info
>
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>



-- 
Regards
Huang Zhiteng