Monitoring your service

We are diving into the world of Microservices and I'm curious, how does a gopher send metric data and to where?

We looked at Prometheus but I don't see how I can send trace data or any kind of event. I want to be able to do that, advice?

Prometheus is great, but it isn't for tracing. You might want to take a look at OpenTracing and the Jaeger project.

This right here!

Prometheus works by pulling metrics from your services. If you have short-lived services, you can also push metrics to prometheus via a push gateway. 

If you’re talking about sending logs somewhere, check out rollbar and sentry. 

Otherwise if you re looking at micro service call graph tracing take a look at aws X-ray