heroku / kafka-demo

twitter-display

A simple app that streams tweets containing a specified set of keywords to web browser clients.

Keywords are specified in the kafka-tweets app. They are read from a Kafka topic named 'test' from the 0th (zeroth) partition in that topic.

Development Setup

Node > v5.x required

npm install

Additionally these environment variables need to be defined:

• KAFKA_URL: A comma separated list of SSL URLs to the Kafka brokers making up the cluster.
• KAFKA_CLIENT_CERT: The required client certificate (in PEM format) to authenticate clients against the broker.
• KAFKA_CLIENT_CERT_KEY: The required client certificate key (in PEM format) to authenticate clients against the broker.

Development Running

npm run dev

Open http://localhost:3000 in a browser and watch tweets stream in...

Deploy

git clone [email protected]:crcastle/twitter-display.git
cd twitter-display
heroku create

You can define the below environment variables manually, or you can run this command to define them from another app that already has a Kafka cluster attached: heroku addons:attach my-originating-app::KAFKA (where "my-originating-app" is the app to which the cluster is already attached)

Or manually:

heroku config:set KAFKA_URL=
heroku config:set KAFKA_CLIENT_CERT=
heroku config:set KAFKA_CLIENT_CERT_KEY=