Open Stack

On 02/10/2015 10:03 PM, Angus Salkeld wrote:
> On Wed, Feb 11, 2015 at 8:20 AM, Miguel Grinberg
> <miguel.grinberg at gmail.com <mailto:miguel.grinberg at gmail.com>> wrote:
> 
>     Hi,
> 
>     We had a discussion yesterday on the Heat channel regarding patterns
>     for searching or filtering entities by its metadata values. This is
>     in relation to a feature that is currently being implemented in Heat
>     called “Stack Tags”.
> 
>     The idea is that Heat stack lists can be filtered by these tags, so
>     for example, any stacks that you don’t want to see you can tag as
>     “hidden”, then when you request a stack list you can specify that
>     you only want stacks that do not have the “hidden” tag.
> 
> 
> Some background, the author initially just asked for a field "hidden".
> But it seemed like there were many more use cases that could be
> fulfilled by having
> a generic "tags" on the stack REST resource. This is really nice feature
> from UI perspective.

Tagging would be incredibly useful for larger heat deployments.


>     We were trying to find other similar usages of tags and/or metadata
>     within OpenStack projects, where these are not only stored as data,
>     but are also used in database queries for filtering. A quick search
>     revealed nothing, which is surprising.
> 
> 
> I have spotted nova's instance tags that look like the kinda beast we
> are after:
>   -  https://blueprints.launchpad.net/nova/+spec/tag-instances
>   -  https://review.openstack.org/#/q/topic:bp/tag-instances,n,z
> 
>  
> 
> 
>     Is there anything I may have missed? I would like to know if there
>     anything even remotely similar, so that we don’t build a new wheel
>     if one already exists for this.
> 
> 
> So we wanted to bring this up as there is a API WG and the concept of
> tags and filtering should be consistent
> and we don't want to run off and do something that the WG really doesn't
> like.
> 

I'll bring up this thread in the API-WG meeting, which happens to be in
20 minutes (11AM EST) if anyone sees this soon enough to also attend.

> But it looks like this needs a bit more fleshing out:
>  http://specs.openstack.org/openstack/api-wg/guidelines/pagination_filter_sort.html#filtering
> 
> Should we just follow nova's instance tags, given the lack of definition
> in api-wg?
> 
> Regards
> Angus
> 
>     Thanks,
> 
>     Miguel
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-- 
Ryan Brown / Software Engineer, Openstack / Red Hat, Inc.