This makes the metrics package more extensible by allowing the default name of `container_id` to be changed by the package caller. Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
This makes it easier to extend the collectors to be used by external code and task managers Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
dicussed in #3726 Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
