Is it possible to send trace via opentelemetry sink with protobuf?

[daniel-lee-sb]

I tried to send trace with opentelemetry protobuf, but events are not sent to the target Tempo server...
Is it even possible to send a trace? I'm afraid that protobuf only supports logs now.

If possible,then how can I make it...?
If not, then when can I make it...?

[pront]

Hi @daniel-lee-sb, the opentelemetry sink is currently a wrapper around the http sink. The latter can accept traces, so what you want to do is doable however it will take some effort because we don't provide a native mapping from Vector events to the format the OTEL collector expects for traces.

[pront]

See similar issue for logs: #22696

[jlambatl]

@daniel-lee-sb, just to confirm that you are describing what I think I am seeing, are you trying to send traces to Tempo using protobuf over HTTP?

@pront From reading the documentation, it seems possible to provide a proto file that will do the encoding. Is there something that I am missing?

[pront]

@pront From reading the documentation, it seems possible to provide a proto file that will do the encoding. Is there something that I am missing?

This is correct. We want to provide native mapping (from Vector traces to OTEL traces) eventually but currently it takes some effort on the user side to get it right.