tree da4515968d162649be5f59a0a10cc85203a3283a
parent 91bfd78339d9d36dc610e90a69fe1659f2504fd7
author Alexander Rakoczy <alex@golang.org> 1587601114 -0400
committer Alexander Rakoczy <alex@golang.org> 1587750661 +0000

sandbox: instrument HTTP handlers with StackDriver

This change adds OpenCensus's HTTP instrumentation to the sandbox. In
development mode, it exposes a prometheus metrics interface on /statusz.
This is the first in a series of CLs to add instrumentation to different
parts of the sandbox to help investigate instability issues. For now,
reporting metrics around our responses per handler to StackDriver will
be helpful.

OpenTelemetry would be preferable, as it is the successor of OpenCensus,
however the StackDriver integration is not quite done.

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

Change-Id: I600fd695bb66c8bee16bc0b778d51930f4cdd476
Reviewed-on: https://go-review.googlesource.com/c/playground/+/229679
Run-TryBot: Alexander Rakoczy <alex@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Carlos Amedee <carlos@golang.org>