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You'd do better to point out which distinction you think the parent poster is missing. My guess is that Prometheus cannot do distributed tracing, while OpenTel

• csomar 2y ago
  Otel is a spec. You can create your own clients/aggregators/etc.. The problem is that if nobody does it, there will be no tooling. So Otel created some tooling (and yes, it's bad) for people to use. Some companies (ie: Datadog) are contributing to the tooling but I think most companies would rather spend dev time on their own platforms than something that anybody (competitor) can use.
  • bluesnews 2y ago
    From the user side, a spec isn't helpful unless it has implementations. And the official implementations are complicated compared to prometheus.
    • MathMonkeyMan 2y ago
      I worked on a team that produced a distributed tracing library. We were tasked with interoperating with OpenTelemetry, or at least figuring out what that means. My teammate said that at a previous job he wanted to add OpenTelemetry tracing to some C++ code he was working on. He took one look at the reference implementation for C++ OpenTelemetry and decided instead to write his own tracing library that sends gRPC to the OpenTelemetry collector. It's also worth noting that, at least last time I checked, the reference implementations per programming language are less like reference implementations of some specification, and more like "this is the code you use to do OpenTelemetry in this language."