tsykoduk / heroku-kafka-demo-ruby

A simple demo app to show off Heroku Kafka from Ruby

heroku-kafka-demo-ruby

A simple heroku app that demonstrates using Kafka in ruby. This demo app accepts HTTP POST requests and writes them to a topic, and has a simple page that shows the last 10 messages produced to that topic.

You'll need to provision the app.

Provisioning

Install the kafka cli plugin:

$ heroku plugins:install heroku-kafka

Create a heroku app with Kafka attached:

$ heroku apps:create your-cool-app-name
$ heroku git:remote -a your-cool-app-name
$ heroku addons:create heroku-kafka:basic-0

Create the sample topic and consumer group. By default, the topic will have 8 partitions:

$ heroku kafka:topics:create messages
$ heroku kafka:consumer-groups:create heroku-kafka-demo

Deploy to Heroku and open the app:

$ git push heroku main
$ heroku open

You can send messages via the web UI or the CLI:

curl -X POST `heroku apps:info | awk '/Web URL/ {print $3}'`messages -d 'your-message-text'