# SDK Configuration

LLMS index: [llms.txt](/llms.txt)

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OpenTelemetry SDKs support configuration in each language and with environment
variables. The following pages describe the environment variables you can use to
configure your SDK.

> [!NOTE]
>
> Support for environment-variable configuration varies across languages. For
> the list of variables supported by each language, see the [environment
> variable compliance matrix][env-var-matrix].

[env-var-matrix]:
  https://github.com/open-telemetry/opentelemetry-specification/blob/main/spec-compliance-matrix.md#environment-variables
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Section pages:

- [General SDK Configuration](/zh/docs/languages/sdk-configuration/general/)
- [OTLP Exporter Configuration](/zh/docs/languages/sdk-configuration/otlp-exporter/)
- [Declarative configuration](/zh/docs/languages/sdk-configuration/declarative-configuration/)