feat(metrics): Add platform tag

[loewenheim]

This adds a configurable platform tag to metrics. If this is set, the platform (determined based on the Symbolicator's hostname) (read from the SYMBOLICATOR_PLATFORM env variable) will be reported with every metric.

Fixes #1509.

[mwarkentin]

@loewenheim just saw this, I will try to take a look. I wonder if there's anything we could do by setting an extra environment variable which could contain a platform tag value. Would this be better than the host name parsing?

[loewenheim]

@loewenheim just saw this, I will try to take a look. I wonder if there's anything we could do by setting an extra environment variable which could contain a platform tag value. Would this be better than the host name parsing?

Sorry for the late answer. From the Symbolicator code perspective it would be simple—we can just read the value of an environment variable. How complicated would it be from the configuration point of view?

[mwarkentin]

@loewenheim pretty easy (I think): https://github.com/getsentry/ops/pull/11922

[loewenheim]

I was under the impression that the platform should just be js, jvm, or native. But in any case, it sounds like an env var is the way to go.

[mwarkentin]

@loewenheim ill try to get these rolled out everywhere tomorrow.

[mwarkentin]

@loewenheim env vars have been configured on:

• s4s
• geico
• goldmansachs
• disney
• ly
• de
• saas (us)