spotify/cassandra repository overview

⁠Cassandra in Docker

This repository provides everything you need to run Cassandra in Docker, and is tuned for fast container startup.

⁠Why?

While naive Cassandra images take around 30 seconds to start, our containers take only a few seconds. Optimizations include:

• Disabling vnodes. We don't use them at Spotify, and Cassandra starts much faster without them (~10 sec).
• Disabling something called "waiting for gossip to settle down" because there is no gossip in a one-node cluster (another ~10 sec).

⁠In the box

• spotify/cassandra

  This is probably the image you want, it runs a one-node Cassandra cluster. Built from the cassandra directory.

• spotify/cassandra:cluster

  Runs a Cassandra cluster. Expects CASSANDRA_SEEDS and CASSANDRA_TOKEN env variables to be set. If CASSANDRA_SEEDS is not set, node acts as its own seed. If CASSANDRA_TOKEN is not set, the container will not run. Built from the cassandra-cluster directory.

• spotify/cassandra:base

  The base image with an unconfigured Cassandra installation. You probably don't want to use this directly. Built from the cassandra-base directory.

⁠Notes

Things are still under heavy development:

• Only Cassandra 2.0 with almost-generic config (miles away from what we actually run Cassandra with) is supported so far.
• There's nothing to help you with tokens and stuff.