[Engine-devel] Gluster Volume asynchronous tasks

[Yair Zaslavsky]

----- Original Message -----
> From: "Sahina Bose" <sabose at redhat.com>
> To: "Eli Mesika" <emesika at redhat.com>
> Cc: "engine-devel" <engine-devel at ovirt.org>, arch at ovirt.org
> Sent: Monday, August 12, 2013 11:51:15 AM
> Subject: Re: [Engine-devel] Gluster Volume asynchronous tasks
> 
> 
> On 08/12/2013 01:21 PM, Eli Mesika wrote:
> >
> > ----- Original Message -----
> >> From: "Sahina Bose" <sabose at redhat.com>
> >> To: "engine-devel" <engine-devel at ovirt.org>, arch at ovirt.org, "Michael
> >> Pasternak" <mpastern at redhat.com>
> >> Sent: Monday, August 12, 2013 8:41:55 AM
> >> Subject: [Engine-devel] Gluster Volume asynchronous tasks
> >>
> >> Hi all,
> >>
> >> We are working on a feature to add support to start and monitor gluster
> >> volume asynchronous tasks (like rebalancing a gluster volume, removing
> >> brick from volume ) from the oVirt engine.
> >>
> >> The operations can be started from the Volumes tab or the Bricks sub-tab
> >> using the Rebalance, Remove options.
> >> These are long running operations which can be monitored using a task id
> >> returned from Gluster. We are planning to add the monitoring in the
> >> existing Task sub tab
> >>
> >> The feature description and User flows are at
> >> http://www.ovirt.org/Features/Gluster_Volume_Asynchronous_Tasks_Management
> >>
> >> The detailed design (including REST API design) is at
> >> http://www.ovirt.org/Features/Detailed_Gluster_Volume_Asynchronous_Tasks_Management.
> >>
> >> I would really appreciate if you could review and provide your valuable
> >> feedback.
> > I Sahina
> > Why not using 6the External Tasks feature introduced for 3.3 for those
> > Gluster tasks ???
> > http://www.ovirt.org/Features/Design/DetailedExternalTasks
> Hi Eli,
> 
> We still want to be able to start and stop these operations from the engine.
> So, when a user wants to say, rebalance a volume, they would go select
> the volume and click on Rebalance Start.
> This would then call the BLL command to start rebalance which will
> invoke the corresponding vdsm verb to start the rebalance on the volume.
> This is the same as existing flow for other commands. The only
> difference is the vdsm verb will return the task id from gluster, for
> the rebalance operation that was started. And we will monitor the
> progress of the task using the gluster task id (by calling a gluster
> command)
> 
> I'm not sure how ExternalTasks would fit in here? I was thinking of
> using ExternalTask support for adding Job/Steps to engine when the
> operation is started outside of engine, that is, from Gluster CLI.
> Please correct me if I'm missing something.

Does this mean that from Gluster CLI you will not try and invoke the rebalance command ?
(I mean, I should either use Gluster CLI or Engine's REST API?)

> 
> 
> >
> >
> >
> >> thanks
> >> sahina
> >> _______________________________________________
> >> Engine-devel mailing list
> >> Engine-devel at ovirt.org
> >> http://lists.ovirt.org/mailman/listinfo/engine-devel
> >>
> 
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