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