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Zipkin 0.4.1 obviates some duplication of configuration. It is also the first version that's published as a docker image. By switching to the published image of zipkin-java, we can be more consistent, as `spring-cloud-sleuth-zipkin-stream` is derived from that, not the scala query service.
Running a Zipkin Query Server
There are 4 parts to Zipkin: the instrumented client apps, the web UI, the backend database and the query server. The database for this implementation is MySQL.
Zipkin Services
Run this app using the docker-compose provided.
$ docker-compose build zipkin
$ docker-compose up
...
and test it
$ curl localhost:9411/api/v1/services
["zipkin-query"]
The app might fail to start if mysql is not available when it needs it. If that happens you can just start it separately: just keep running docker-compose up until it works.
Instrumenting Apps
Depend on Spring Cloud Sleuth Stream and the rabbit binder (spring-cloud-starter-stream-rabbit).
Once the apps start publishing spans they will appear in the span store as well.
Running in an IDE
You can run this app in an IDE and still use docker-compose to create the middleware:
$ docker-compose up rabbitmq mysql
The web UI cannot access the docker host though, so you have to run that separately, or just test against the query server directly on port 9411.