Feature/otel

Open IRClichtR opened this issue 2 months ago • 1 comments

Add feature `otel` for distributed tracing

Objective

Adding opentelemetry to current tracing with ingestion of trace, enabling distributed tracing and diagnose issues. This feature is not meant for production but for debug mode. The feature is and will remain optional.

Summary of changes

Creation of a common/opentelemetry sub-crate with tools for distributed tracing across websocket, http headers and sphinx
Modification of gateway crate to accept incoming traces from clients (examples in sdk)
Modification of common libraries to follow trace_id into connection mechanisms

Limitations

very partial instrumentation of sphinx should be improved in the future to avoid breaking trace caused by async and multi-threaded context
following of trace is concentrated on the messages exchanged during the connection to the gateway

This change is