Hot R.O.D. - Rides on Demand

This is a demo application that consists of several microservices and illustrates the use of the OpenTracing API. It can be run standalone, but requires Jaeger backend to view the traces. A tutorial / walkthough is available:


  • Discover architecture of the whole system via data-driven dependency diagram
  • View request timeline & errors, understand how the app works
  • Find sources of latency, lack of concurrency
  • Highly contextualized logging
  • Use baggage propagation to
    • Diagnose inter-request contention (queueing)
    • Attribute time spent in a service
  • Use open source libraries with OpenTracing integration to get vendor-neutral instrumentation for free


Run Jaeger Backend

An all-in-one Jaeger backend is packaged as a Docker container with in-memory storage.

docker run \
  --rm \
  --name jaeger \
  -p6831:6831/udp \
  -p16686:16686 \

Jaeger UI can be accessed at http://localhost:16686.

Run HotROD from source

go get
cd $GOPATH/src/
make install
cd examples/hotrod
go run ./main.go all

Run HotROD from docker

docker run \
  --rm \
  --link jaeger \
  --env JAEGER_AGENT_HOST=jaeger \
  --env JAEGER_AGENT_PORT=6831 \
  -p8080-8083:8080-8083 \
  jaegertracing/example-hotrod:latest \

Then open