Jaeger (Tracing)

• Introduction
• Creating the exporter
• Viewing your traces
• Project link

Introduction

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 / latency optimization

OpenCensus Python has support for this exporter available through package opencensus.trace.exporters.jaeger_exporter

Creating the exporter

To create the exporter, we’ll need to:

• Create an exporter in code
• Have the Jaeger endpoint available to receive traces

#!/usr/bin/env python

from opencensus.ext.jaeger.trace_exporter import JaegerExporter
from opencensus.trace.tracer import Tracer

def main():
    je = JaegerExporter(
        service_name="service-b",
        host_name="localhost",
        agent_port=6831,
        endpoint="/api/traces")

    tracer = Tracer(exporter=je)
    with tracer.span(name="doingWork") as span:
        for i in range(10):
            pass

if __name__ == "__main__":
    main()

Viewing your traces

Please visit the Jaeger UI endpoint http://localhost:16686

Project link

You can find out more about the Jaeger project at https://www.jaegertracing.io/