Allow filter by granularity when aggregating across metrics

[nubeliu_dev]

When you aggregate metrics, it will be useful to filter one granularity.

[Sam Morrison (sorrison)]

Is anyone working on this, I think this feature is quite important. We have 3 policy rules and when you get all measures it returns them for each policy. This is a pain as you usually only want it based on one granularity rule. Eg when making graphs etc.

[Julien Danjou (jdanjou)]

Sam, are you talking on aggregation or in general?

Nobody's working on this for aggregation, but in general, this is already supported – though I realized it's not documented.

[OpenStack Infra (hudson-openstack)]

Related fix proposed to branch: master
Review: https://review.openstack.org/265753

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/265753
Committed: https://git.openstack.org/cgit/openstack/gnocchi/commit/?id=1dbd7763a0b875e1cf951a1b40afd64458bed852
Submitter: Jenkins
Branch: master

commit 1dbd7763a0b875e1cf951a1b40afd64458bed852
Author: Julien Danjou <email address hidden>
Date: Mon Jan 11 11:17:08 2016 +0100

    doc: add granularity argument for measure retrieval

    Change-Id: I8312efa7a7cf1e519cbc73eed6aa2f814c354cf3
    Related-Bug: #1512740

[Sergio Colinas (sergio-n)]

Hi Julien,

I've created this bug and the general that you've fixed (https://bugs.launchpad.net/gnocchi/+bug/1506628)

We also need this filter when aggregate metrics, like Sam said, is a pain as you usually only want it based on one granularity rule.

[Julien Danjou (jdanjou)]

Ok, I'll keep that around and I'll try to work on it soon!

[Sam Morrison (sorrison)]

I added a bug for support in the client https://bugs.launchpad.net/python-gnocchiclient/+bug/1532984

[OpenStack Infra (hudson-openstack)]

Related fix proposed to branch: master
Review: https://review.openstack.org/267606

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/267607

[OpenStack Infra (hudson-openstack)]

Change abandoned by Julien Danjou (<email address hidden>) on branch: master
Review: https://review.openstack.org/267606

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/267607
Committed: https://git.openstack.org/cgit/openstack/gnocchi/commit/?id=9afee322b340e3eb85c20e700f6d7ff3d221f147
Submitter: Jenkins
Branch: master

commit 9afee322b340e3eb85c20e700f6d7ff3d221f147
Author: Julien Danjou <email address hidden>
Date: Thu Jan 14 14:47:54 2016 +0100

    storage,rest: add support for granularity in aggregation

    This allows to provide the storage driver a granularity argument when
    doing cross-metric aggregation.

    Change-Id: I33d48e66c39f7cf02f5fa26697994750b5215513
    Closes-Bug: #1512740