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Cassandra Redis Proxy

This is a simple proxy that allows you to use Cassandra as a cache backend for Redis.

Configuration

The configuration is done through environment variables:

  • PROXY_LOG_LEVEL (default: info): Log level. Possible values are debug, info, warn, error.
  • PROXY_CASSANDRA_HOSTS (default: localhost): Comma separated list of Cassandra hosts.
  • PROXY_CASSANDRA_KEYSPACE (default: key_value_store): Cassandra keyspace.
  • PROXY_CASSANDRA_TABLE (default: `key_value): Cassandra table.
  • PROXY_REDIS_ADDRESS (default: :6380): Redis listen address.

Cassandra

Requires a cassandra version 3.0 or higher.

Schema

CREATE KEYSPACE key_value_store WITH replication = {'class': 'NetworkTopologyStrategy'};

CREATE TABLE key_value_store.key_value (
    key text PRIMARY KEY,
    value text
) WITH default_time_to_live = 7884000;
  • default_time_to_live is set to 7884000 seconds (3 months) to avoid the cache growing indefinitely. Zero means no expiration.

Redis

Supported commands:

  • DEL
  • EXISTS
  • EXPIRE
  • GET
  • PING
  • PTTL
  • QUIT
  • RENAME
  • SET
  • TTL
  • UNLINK