Add Docker labels as tags.

[ajohnstone]

With telegraf it only supports tags in the form of id, name and command.
However doesn't import the actual labels associated to the container.

https://docs.docker.com/userguide/labels-custom-metadata/.

This is quite important with things like ECS.

[sparrc]

Sounds good, will investigate

[JulienChampseix]

Will be usefull this feature because labels are really usefull in docker. Do you progress on this enhancement ?

[sparrc]

I haven't yet, as I've been working on merging PRs and other more basic stability issues with Telegraf.

[zepouet]

Hello, I will try to do it because I worked with the docker api few times ago.

[JulienChampseix]

any progress on it ?

[sparrc]

I will be able to work on this soon, once I can get #180 merged (waiting on CLA)

[JulienChampseix]

Cool the #180 is now close, hope the merge will come soon for unblock this issue/feature

[sparrc]

@JulienChampseix finally found some time to get to this, it's available if you build from source, and I'll hopefully get a nightly build system going soon to get features like this out to people sooner