Simple, lightweight tracing. The tracer provides API to trace execution flow.
func Do(ctx context.Context) {
defer tracer.Fetch(ctx).Start().Stop()
// do some heavy job
}
At Avito, we use the Jaeger - a distributed tracing platform. It is handy in most cases, but at production, we also use sampling. So, what is a problem, you say?
I had 0.02% requests with a write: broken pipe error and it was difficult to find the appropriate one in the Sentry which also has trace related to it in the Jaeger.
For that reason, I wrote the simple solution to handle this specific case and found the bottleneck in our code quickly.