Kafka Cryptocoin

Kafka producer for data collection from cryptocurrency exchanges

Configuration

Environment Variables

• KAFKA_CRYPTOCOIN_BOOTSTRAP_SERVERS: Comma separated list of Kafka brokers. Port is required.
• KAFKA_CRYPTOCOIN_SCHEMA_REGISTRY_URL: URL for Kafka Schema Registry
• KAFKA_CRYPTOCOIN_PRODUCER_CONFIG: Path to Kafka producer properties file (optional)

application.conf

Main config is at kafka.cryptocoin.

• exchanges: List of enabled exchanges. Default is all supported exchanges.

Kafka

You must have a running Kafka broker and Kafka Schema Registry. These are part of Confluent Platform 3.0. You may go to the Quickstart to get them running locally for development.

Usage

Start the the required services. Then, run:

export KAFKA_CRYPTOCOIN_BOOTSTRAP_SERVERS=localhost:9092
export KAFKA_CRYPTOCOIN_SCHEMA_REGISTRY_URL=http://localhost:8081
sbt run

Running the tests

sbt test

Docker

Docker Compose

This repo includes a Compose file that will run the (development version of the) app and all services required for demo purposes.

docker-compose up

Prepare for lots of output. The app should wait for the required services to start.

Run Docker image

Images for development and mainline versions are built and pushed to Docker Hub when a pull request is merged. Merges into git branches develop or master are images published on Docker Hub with tags develop and latest respectively. Project releases are published with tags equal to the git release tag.

This downloads the latest development version and assumes your required services are running locally.

docker run --net=host \
-e KAFKA_CRYPTOCOIN_BOOTSTRAP_SERVERS=localhost:9092 \
-e KAFKA_CRYPTOCOIN_SCHEMA_REGISTRY_URL=http://localhost:8081 \
coinsmith/kafka-cryptocoin:develop

Build a Docker image

sbt docker

Then, you can run it as specified above. Images built from code will be tagged as the current snapshot version.