Open Stack

On Mon, Nov 18, 2013 at 1:35 PM, Ladislav Smola <lsmola at redhat.com> wrote:

>  Hello. I have a couple of additional questions.
>
> 1. What about IPMI data that we want to get by polling. E.g. temperatures,
> etc. Will the Ironic be polling these kind of
>     data and send them directly to collector(or agent)? Not sure if this
> belongs to Ironic. It would have to support some
>     pluggable architecture for vendor specific pollsters like Ceilometer.
>

The ceilometer and ironic teams will need to collaborate to ensure the
desired data is being collected.


>
> 2. I've seen in the etherpad that the SNMP agent(pollster) will be also
> part of the Ironic(running next to conductor). Is it true?
>     Or that will be placed in Ceilometer central agent?
>

Good question.

Doug



>
>
> Thanks for response.
> Ladislav
>
>
>
> On 11/18/2013 06:25 PM, Devananda van der Veen wrote:
>
> Hi Lianhao Lu,
>
>  I briefly summarized my recollection of that session in this blueprint:
>
>  https://blueprints.launchpad.net/ironic/+spec/add-ceilometer-agent
>
>  I've responded to your questions inline as well.
>
>
> On Sun, Nov 17, 2013 at 10:24 PM, Lu, Lianhao <lianhao.lu at intel.com>wrote:
>
>> Hi stackers,
>>
>> During the summit session Expose hardware sensor (IPMI) data
>> https://etherpad.openstack.org/p/icehouse-summit-ceilometer-hardware-sensors,
>> it was proposed to deploy a ceilometer agent next to the ironic conductor
>> to the get the ipmi data. Here I'd like to ask some questions to figure out
>> what's the current missing pieces in ironic and ceilometer for that
>> proposal.
>>
>> 1. Just double check, ironic won't provide API to get IPMI data, right?
>>
>
>  Correct. This was generally felt to be unnecessary.
>
>>
>> 2. If deploying a ceilometer agent next to the ironic conductor, how does
>> the agent talk to the conductor? Through rpc?
>>
>
>  My understanding is that ironic-conductor will emit messages to the
> ceilimeter agent, and the communication is one-way. These could be
> triggered by a periodic task, or by some other event within Ironic, such as
> a change in the power state of a node.
>
>
>>
>> 3. Does the current ironic conductor have rpc_method to support getting
>> generic ipmi data, i.e. let the rpc_method caller specifying arbitrary
>> netfn/command to get any type of ipmi data?
>>
>
>  No, and as far as I understand, it doesn't need one.
>
>
>>
>> 4. I believe the ironic conductor uses some kind of node_id to associate
>> the bmc with its credentials, right? If so, how can the ceilometer agent
>> get those node_ids to ask the ironic conductor to poll the ipmi data? And
>> how can the ceilometer agent extract meaningful information from that
>> node_id to set those fields in the ceilometer Sample(e.g. recource_id,
>> project_id, user_id, etc.) to identify which physical node the ipmi data is
>> coming from?
>>
>
>  This question perhaps requires a longer answer.
>
>  Ironic references physical machines (nodes) internally with an integer
> node_id and externally with a standard uuid. When a Nova instance is
> created, it will be associated to a node, that node will have a reference
> to the nova instance_uuid which is exposed in our API, and can be passed to
> Ceilometer's agent. I believe that nova instance_uuid will enable
> ceilometer to detect the project, user, etc.
>
>  Should Ironic emit messages regarding nodes which are not provisioned?
> Physical machines that don't have a tenant instance on them are not
> associated to any project, user, tenant, quota, etc, so I suspect that we
> shouldn't notify about them. It would be like tracking the unused disks in
> a SAN.
>
>  Regards,
> Devananda
>
>
>
> _______________________________________________
> OpenStack-dev mailing list
> OpenStack-dev at lists.openstack.org
> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstack.org/pipermail/openstack-dev/attachments/20131118/102a2c76/attachment.html>