I want to add a series of asynchronous spans to a single trace so that they all appear in one Tempo timeline. These spans are triggered by a single request, but they are executed asynchronously from a work queue and so don’t have a parent-child relationship with the original request (or between themselves). Furthermore, some of these spans might be remote and running in a different service.
I’m using the Go SDK, so I create an initial span in the code that handles the triggering condition with tracer.Start(ctx) and then close the span when that handler ends with span.End(). My question is how to create the asynchronous spans to capture the work that’s done (minutes or perhaps hours) later.
In other words, how can I create a span that belongs to the same trace as a previous span that has already ended?