Observability та Distributed Tracing: Повний Гайд | Технологічний Портал

Observability and Distributed Tracing: A Complete Guide

What is Observability?

Observability – this is the ability of a system to provide information about its internal state based on external outputs. It’s built upon three pillars: metrics, logs, and traces.

Tracing with OpenTelemetry

The code demonstrates basic tracing using the OpenTelemetry library. This allows you to track requests as they flow through your service.

`const { trace } = require('@opentelemetry/api');` initializes the tracing API, and `trace.getTracer('my-service')` creates a tracer for your application.

Exporting Traces with Zipkin

The code uses the Zipkin exporter to send traces to a Zipkin service, typically running on `http://localhost:9411/api/v2/spans`. This allows you to visualize and analyze your distributed requests.

`const { ZipkinExporter } = require('@opentelemetry/exporter-zipkin');` imports the exporter, and the code creates a new instance configured to send traces to the specified URL.

Sampling Strategies

To avoid overwhelming systems with trace data, sampling is used. This technique selects a subset of requests to trace fully.

Adaptive sampling dynamically adjusts the sampling rate based on system load, ensuring that critical traces are always captured while minimizing overhead during low-load periods.

Frequently asked questions