all: Support OpenTelemetry for traces exported from client methods

[ahmetb]

Right now Cloud client libraries for Go have direct integration with OpenCensus, which is an amazing feature.

However, the Google recommendation is to use OpenTelemetry at this point:

Cloud Trace recommends using OpenTelemetry. OpenTelemetry is an open-source product from the merger between OpenCensus and OpenTracing. ​OpenTelemetry is an open-source product from the merger between OpenCensus and OpenTracing.

(I do not agree with this and I listed why at http://doc/1R82XXlE8dVt1C-kLYRH2gFLVCzSgKiRna0yroZTsjhs which is an internal friction log for reasons.)

Right now, if you use cloud.google.com/go packages but you have instrumented your app using OpenTelemetry, you can get traces using the opencensus-bridge which largely works (you just pay attention to not get yourself in an infinite loop).

So this is not very urgent, however we should probably do this in the long term since OT will be way to Go and it's better to come up with a migration plan (that is graceful to OpenCensus users) sooner than later.

[codyoss]

Thanks for the request @ahmetb. I am going to close this issue in favor of #4234 which was opened just earlier today. If you want to add extra details in that issue feel free 😄

[ahmetb]

They don't look like the same thing though? That's about instrumenting streaming RPCs, this is about using a different instrumentation framework. @codyoss

[codyoss]

Yes they are different but I guess I see them as getting, most likely, solved at the same time with a wholistic approach. I will reopen this issue for now though.

[DONSA]

The fact that Spanner is still integrating with OpenCensus is the reason why we haven't moved to OpenTelemetry yet.

[dustinmoris]

Hello, just wondering what the current status is of this work? If it is tracked somewhere publicly would it be possible to add a link here so we can see how far this issue has progressed since it was opened more than 2 years ago?