An example using Kafka with ruby-kafka & racecar gems.

1. Build

   docker-compose build

1. Run Docker

   docker-compose up

2. Run Consumer within app container

   # docker-compose exec app bash
   racecar --require consumer Consumer

3. Run Producer within app container

   # docker-compose exec app bash
   ruby producer.rb

4. Consumer will prints Hello World with current time. You can run Producer multiple times to send more messages.