Add support for OTEL_EXPORTER_OTLP_LOGS_* env vars

[srikanthccv]

Similar to traces and metrics, the OTLP metric exporter should support OTEL_EXPORTER_OTLP_LOGS_* env vars.

Exporter protocol specification https://github.com/open-telemetry/opentelemetry-specification/blob/ab70eb9d364e7d6f25ba45e4ccbebaadceb5fa6a/specification/protocol/exporter.md

[sudhanshu-chauhan]

would like to take this up @srikanthccv

[srikanthccv]

@sudhanshu-chauhan are you still working on this?

[srikanthccv]

@sudhanshu-chauhan Since there has been no progress for the last 45 days, and you haven't responded, I assume you don't have the time to complete it. I am unassigning you. If you want to pick up something again, there is always more to do.

[pridhi-arora]

@srikanthccv Can I take this one up?

[pridhi-arora]

Similar to traces and metrics, the OTLP metric exporter should support Does it intend to say OTLP log exporter?
Traces, metrics, and logs are the 3 metrics, as I understand by working on my previous PR.

[srikanthccv]

Does it intend to say OTLP log exporter?

You correct. They are already supported for traces and metrics. This issue is for adding the same to the OTLP log exporter. We need to add support in two places

1. gRPC exporter (https://github.com/open-telemetry/opentelemetry-python/tree/main/exporter/opentelemetry-exporter-otlp-proto-grpc/src/opentelemetry/exporter/otlp/proto/grpc/_log_exporter)
2. HTTP exporter (https://github.com/open-telemetry/opentelemetry-python/tree/main/exporter/opentelemetry-exporter-otlp-proto-http/src/opentelemetry/exporter/otlp/proto/http/_log_exporter)

Look at how OTEL_EXPORTER_OTLP_TRACES_* or OTEL_EXPORTER_OTLP_METRICS_* are implemented and do the same. Let me know if you need any other help.

[pridhi-arora]

Thanks @srikanthccv Taking this one up first.