sampling rates

[chaneytech]

Can sampling rates be configured in version 0.4.1, such as using the OTEL_TRACES_SAMPLER_ARG environment variable?

[123liuziming]

I believe we support to sample using OTEL_TRACES_SAMPLER_ARG according to https://opentelemetry.io/docs/specs/otel/configuration/sdk-environment-variables/ because we just use the native opentelemetry-go sdk

[chaneytech]

I believe we support to sample using OTEL_TRACES_SAMPLER_ARG according to https://opentelemetry.io/docs/specs/otel/configuration/sdk-environment-variables/ because we just use the native opentelemetry-go sdk

Ok，thank you. I also want to ask if all the environment variables take effect? For OTEL_METRICS_EXPORTER, when I configure it to 'console', it seems not to work as the data is being exported to otlp by default. Is the export destination not determined by the environment variable?

[123liuziming]

I believe we support to sample using OTEL_TRACES_SAMPLER_ARG according to https://opentelemetry.io/docs/specs/otel/configuration/sdk-environment-variables/ because we just use the native opentelemetry-go sdk

Ok，thank you. I also want to ask if all the environment variables take effect? For OTEL_METRICS_EXPORTER, when I configure it to 'console', it seems not to work as the data is being exported to otlp by default. Is the export destination not determined by the environment variable?

We only support http/grpc exporter in otel_setup. We will support more exporter later, #215