On 3/27/2017 9:59 AM, Duncan Thomas wrote:
On 27 March 2017 at 14:20, 王玺源 <[email protected] <mailto:[email protected]>> wrote:I think the reason is quite simple: 1. Some users don't want to use key/value pairs to tag volums. They just need some simple strings. ...and some do. We can hide this in the client and just save tags under a metadata item called 'tags', with no API changes needed on the cinder side and backwards compatability on the client. 2. Metadata must be shorter than 255. If users don't need keys, use tag here can save some spaces. How many / long tags are you considering supporting? 3. Easy for quick searching or filter. Users don't need to know what' the key related to the value. The client can hide all this, so it is not really a justification 4. For Web App, it should be a basic function[1] Web standards are not really standards. You can find a million things that apps 'should' do. They're usually contradictory. [1]https://en.m.wikipedia.org/wiki/Tag_(metadata) <https://en.m.wikipedia.org/wiki/Tag_(metadata)> 2017-03-27 19:49 GMT+08:00 Sean McGinnis <[email protected]>: On Mon, Mar 27, 2017 at 03:13:59PM +0800, 王玺源 wrote: > Hi cinder team: > > I want to know what's your thought about adding tags for volumes. > > Now Many resources, like Nova instances, Glance images, Neutron > networks and so on, all support tagging. And some of our cloud customers > want this feature in Cinder as well. It's useful for auditing, billing for > could admin, it can let admin and users filter resources by tag, it can let > users categorize resources for different usage or just remarks something. > > Actually there is a related spec in Cinder 2 years ago, but > unfortunately it was not accepted and was abandoned : > https://review.openstack.org/#/c/99305/ <https://review.openstack.org/#/c/99305/> > > Can we bring it up and revisit it a second time now? What's cinder > team's idea? Can you give me some advice that if we can do it or not? Can you give any reason why the existing metadata mechanism does not or will not work for them? There was some discussion in that spec explaining why it was rejected at the time. I don't think anything has changed since then that would change what was said there. > > > Thanks! > > Wangxiyuan > __________________________________________________________________________ > OpenStack Development Mailing List (not for usage questions) > Unsubscribe: [email protected]?subject:unsubscribe <http://[email protected]?subject:unsubscribe> > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev <http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev> __________________________________________________________________________ OpenStack Development Mailing List (not for usage questions) Unsubscribe: [email protected]?subject:unsubscribe <http://[email protected]?subject:unsubscribe> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev <http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev> __________________________________________________________________________ OpenStack Development Mailing List (not for usage questions) Unsubscribe: [email protected]?subject:unsubscribe <http://[email protected]?subject:unsubscribe> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev <http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev> -- -- Duncan Thomas __________________________________________________________________________ OpenStack Development Mailing List (not for usage questions) Unsubscribe: [email protected]?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
Duncan, which client are you referring to? python-cinderclient? Or are you suggesting duplicating that client-side logic in every client library available in the ecosystem.
I brought up the same questions about using metadata when we added server tags support to nova, and it's just too heavy weight in this case when all you want is a dumb simple little tag.
The nova spec discusses metadata as an alternative if you're interested: https://specs.openstack.org/openstack/nova-specs/specs/newton/implemented/tag-instances.html -- Thanks, Matt __________________________________________________________________________ OpenStack Development Mailing List (not for usage questions) Unsubscribe: [email protected]?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
