OpenTelemetry SDK
also: OTel SDK, OpenTelemetry, OTel
OpenTelemetry SDK is a set of libraries and tools that instrument applications to collect and export telemetry data (traces, metrics, and logs) for monitoring and observability.
The OpenTelemetry SDK (Software Development Kit) is a vendor-neutral framework that enables developers to instrument their applications to generate and collect telemetry signals—distributed traces, metrics, and logs. It provides language-specific libraries that integrate into your application code to capture performance data and operational insights.
The SDK handles the collection of telemetry data through exporters that send this data to backend systems like Prometheus, Jaeger, Datadog, or other observability platforms. For example, instrumenting a Python application might look like: from opentelemetry import trace; tracer = trace.get_tracer(__name__) to create spans representing operations.
OpenTelemetry is designed to be pluggable and framework-agnostic, allowing teams to switch monitoring backends without changing instrumentation code. It's maintained as a CNCF project and has become a standard for modern application observability in cloud-native and containerized environments.