tree a1cf4e986857bd90c8ee3e2f1083d807ea899121
parent 7bdfbfb0d0cffd2504562896fd4b31d580eeeb65
author Alexander Rakoczy <alex@golang.org> 1587601114 -0400
committer Alexander Rakoczy <alex@golang.org> 1587750706 +0000

sandbox: instrument number of running containers

This change adds a metric to count the number of running containers,
according to Docker.

Updates golang/go#25224
Updates golang/go#38530

Change-Id: Id989986928dff594cb1de0903a56dcffed8220c4
Reviewed-on: https://go-review.googlesource.com/c/playground/+/229680
Run-TryBot: Alexander Rakoczy <alex@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Carlos Amedee <carlos@golang.org>