CDNS

A DNS server which stores domain information in Cassandra.

Cassandra

CDNS will use the Keyspace with the name "cdns". If it doesn't exist yet it will be created with the following settings:

CREATE KEYSPACE cdns WITH replication = {
  'class': 'SimpleStrategy',
  'replication_factor': 1
}

In any non-testing environment the Keyspace should probably be pre-created.

CDNS will use the Column-Family "cdns.cdns" which it will automatically create:

CREATE COLUMNFAMILY cdns.cdns (
  question text,
  type text,
  answers list<text>,
  shuffle boolean,
  PRIMARY KEY (question, type)
)

Entries can be added using the following statement:

UPDATE cdns.cdns SET
    answers = ['1.2.3.4', '2.3.4.5'],
    shuffle = True
  WHERE question = 'example.com'
    AND type = 'A';

Installation

Docker Compose

docker-compose up -d

Docker

Cassandra

docker run -d --name cassandra cassandra

cqlsh

docker exec -it cassandra cqlsh

cdns

docker run --name cdns -d --link cassandra:cassandra -p 53:53/udp mkroli/cdns