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Labels are Docker's way of adding custom metadata to containers and images. They can be applied at image build or at runtime. They are exposed via the Docker API in the
containers
call.This PR adds those labels to
container
ascontainer['Labels']
. They are then parsed and appended to theplugin_instance
value, for example:Given that collectd only has a 64 character limit for values this isn't ideal but is a fast way to allow us to expose a Docker container's metadata.