Review and enhance metric support for product catalog service (Go)

[cartersocha]

The following are requirements for metrics in the project. Not all services will meet all requirements.

• Service metrics should not be duplicative of trace-derived metrics.
• Services should emit multiple business metrics where appropriate.
• Services should emit trace exemplars for their metrics.
• Services should use push metrics where possible.
• Services should explicitly read baggage where needed.
• Collectors should perform metric transforms to normalize resource and service metrics.

Referencing issue: #43

[Frapschen]

hi，I want help it. :)

[cartersocha]

All yours! @Frapschen

[Frapschen]

@cartersocha I'm a little confuse, what metrics should we add to service? in my view, we can add some span metric by the otel-collector:

• calls_total
• latency_bucket

[cartersocha]

We haven’t had time to define our metric story yet. We are planning on discussing overall metric requirements in our next sig meeting.

We’ll need to set up a consumption experience too. I’m guessing we’ll add grafana in a container or something similar.

Feel free to open a pr with what metrics you think would be useful. Then we can use that to solicit feedback / input from everyone

[Frapschen]

The newest implementation instrumentation for the runtime package is in process, waiting for its finish.

[austinlparker]

Basic metrics have been added; closing issue.