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Jaeger

Jaeger, inspired by Dapper and OpenZipkin, is a distributed tracing system released as open source by Uber Technologies. It is used for monitoring and troubleshooting microservices-based distributed systems, including:

  • Distributed context propagation
  • Distributed transaction monitoring
  • Root cause analysis
  • Service dependency analysis
  • Performance or latency optimization

Instrumentation

https://www.jaegertracing.io/docs/1.17/client-libraries/

All Jaeger client libraries support the OpenTracing APIs for instrumentation.

Running Jaeger All-in-One

https://www.jaegertracing.io/docs/1.17/getting-started/#all-in-one

All-in-one is an executable designed for quick local testing, launches the Jaeger UI, collector, query, and agent, with an in memory storage component. The simplest way to start the all-in-one is to use the pre-built image published to DockerHub (a single command line).

$ docker run -d --name jaeger \
  -e COLLECTOR_ZIPKIN_HTTP_PORT=9411 \
  -p 5775:5775/udp \
  -p 6831:6831/udp \
  -p 6832:6832/udp \
  -p 5778:5778 \
  -p 16686:16686 \
  -p 14268:14268 \
  -p 14250:14250 \
  -p 9411:9411 \
  jaegertracing/all-in-one:1.17

In Kubernetes: https://github.com/jaegertracing/jaeger-operator

API

Doc: https://www.jaegertracing.io/docs/1.17/apis/

Get an HTTP response of a trace

http://{Jaeger_UI_IP}:16686/trace/{trace_id}

Get the trace in the JSON format

http://{Jaeger_UI_IP}:16686/api/traces/{trace_id}

Get all traces during the last specified duration

curl -s 'http://localhost:16686/api/traces?service=nginx-web-server&lookback=50m&prettyPrint=true&limit=100'

  • service={service_name}
  • lookback={look_back_time}
  • prettyPrint={true_for_formatted_JSON}
  • limit={max_num_of_traces}

Another example:

http://localhost:16686/api/traces?end=1615178645442000&limit=20&lookback=1h&maxDuration&minDuration&operation=ReadHomeTimeline&service=nginx-web-server&start=1615175045442000

Get search results in an HTTP response

http://localhost:16686/search?end=1615178645442000&limit=20&lookback=1h&maxDuration&minDuration&operation=ReadHomeTimeline&service=nginx-web-server&start=1615175045442000