Support Dynamic Logging

[tigrannajaryan]

Dynamic Logging is an ability to instrument applications in order to turn on/of exisiting log statements or inject log statements on specific lines of code at runtime.

Here are some products that do this:

https://docs.lightrun.com/
https://www.runsidekick.com/dynamic-logging
https://docs.pixielabs.ai/tutorials/custom-data/dynamic-go-logging/

It would be great to have a similar capability in OpenTelemetry SDK.

This requires a communication channel from the backend to the SDK, which can be achieved using OpAMP (either via remote configuration capabilities or via custom messages).

This can be probably further extended to also allow dynamic control and injection of metrics and spans.

[reyang]

Currently the Technical Committee doesn't have enough capacity to move this forward, we would like to use this issue to collect ideas and feedback, and once we have sufficient information AND we have capacity, we'll move forward.