OpenTelemetry

Concept

• Trace: A single request, made of many spans, linked with trace_id
  • Span: One timed step (DB query, HTTP call, function). Starts ends and carries metadata
    • Root Span
      • Child Span of root span

Collector

• 应用把 traces / metrics / logs 发给它
• 负责 接收、处理、过滤、采样、转换
• 再把数据转发到后端，比如 Datadog、Jaeger、Prometheus、Tempo、Loki、OTLP backend 等

Components

• Receivers - Collect telemetry data from various sources and formats
  接收器（Receivers）—— 从各种来源和格式收集遥测数据
• Processors - Transform, filter, and enrich telemetry data
  处理器（Processors）—— 转换、过滤和丰富遥测数据
• Exporters - Send telemetry data to observability backends
  导出器 — 将遥测数据发送至可观测性后端
• Connectors - Connect two pipelines, acting as both exporter and receiver
  连接器 — 连接两条流水线，同时充当导出器和接收器
• Extensions - Provide additional capabilities like health checks
  扩展组件 — 提供健康检查等附加功能

Demo

• OpenTelemetry Demo Docs | OpenTelemetry
• Envoy

Links

• Datadog
• jaeger