What is OpenTelemetry?

OpenTelemetry (OTel) is an open-source framework for collecting telemetry data from software applications. It unifies traces, metrics, and logs under a single standard.

Developed under the CNCF (Cloud Native Computing Foundation), OTel offers a vendor-agnostic monitoring solution.

Core Concepts

OpenTelemetry has three core components: Tracer, Meter, and Logger. Span and Trace are the building blocks of distributed tracing.

Each span represents a specific part of an operation, and a trace is a collection of these spans.

Setup and Configuration

To add OpenTelemetry to a Node.js application, you need to install the required SDK and exporter packages. You can send data to backends like Jaeger, Zipkin, or Prometheus using the OTLP exporter.

OpenTelemetry SDK installation Auto-instrumentation support Custom span and metric definition Exporter configuration

Auto-Instrumentation

OpenTelemetry offers auto-instrumentation support for popular libraries. You can automatically monitor HTTP requests, database queries, and Redis calls.

Collection and Visualization

Visualize collected telemetry data with Jaeger for distributed tracing, Prometheus for metrics, and Grafana for dashboards. These tools give you end-to-end visibility into your application performance.