Starting Jaeger

First, we need a working Jaeger instance that you can start as a Docker container from the official Docker image that contains all of the parts of the application in one. It's even called jaegertracing/all-in-one:

$ docker run --rm --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 9411:9411 \
  jaegertracing/all-in-one:1.8

Open all the necessary ports, and access the web UI of Jaeger at http://localhost:16686.

Now, we can write an application to interact with this instance.