We should have a dedicated page with all possible configuration settings. Example from .NET Automatic Instrumentation: https://github.com/open-telemetry/opentelemetry-dotnet-instrumentation/blob/main/docs/config.md

Here is how we can find some env vars coming from this repo: https://github.com/search?q=repo%3Aopen-telemetry%2Fopentelemetry-go-instrumentation%20%22OTEL_&type=code

We need to remember to also document config which comes from the dependencies e.g.

• https://pkg.go.dev/go.opentelemetry.io/contrib/exporters/autoexport (only the ones related with tracing)
• https://pkg.go.dev/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc
• https://pkg.go.dev/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp

I think these env vars are supported as well (documentation for these env vars: https://opentelemetry.io/docs/specs/otel/configuration/sdk-environment-variables/):

• OTEL_SPAN_ATTRIBUTE_COUNT_LIMIT
• OTEL_SPAN_ATTRIBUTE_VALUE_LENGTH_LIMIT
• OTEL_SPAN_EVENT_COUNT_LIMIT
• OTEL_SPAN_LINK_COUNT_LIMIT
• OTEL_EVENT_ATTRIBUTE_COUNT_LIMIT
• OTEL_LINK_ATTRIBUTE_COUNT_LIMIT
• OTEL_ATTRIBUTE_VALUE_LENGTH_LIMIT (IMO it is better not to document this env var as it is not documented in OTel Go SDK also other env vars offer more fine-grained control)
• OTEL_ATTRIBUTE_COUNT_LIMIT (IMO it is better not to document this env var as it is not documented in OTel Go SDK also other env vars offer more fine-grained control)