Jaeger 链路追踪：最小部署与 trace 示例

version: '3'
services:
  jaeger:
    image: jaegertracing/all-in-one:1.47
    ports:
      - "16686:16686"  # UI
      - "6831:6831/udp" # agent

const { NodeTracerProvider } = require('@opentelemetry/sdk-trace-node');
const { SimpleSpanProcessor } = require('@opentelemetry/sdk-trace-base');
const { JaegerExporter } = require('@opentelemetry/exporter-jaeger');

const provider = new NodeTracerProvider();
provider.addSpanProcessor(new SimpleSpanProcessor(new JaegerExporter({
  endpoint: 'http://localhost:14268/api/traces'
})));
provider.register();