Exhibitor2dns will keep a round-robin A record in sync with the state of a Zookeeper ensemble managed by the excellent Exhibitor supervisor from Netflix. This is particularly useful if your Zookeeper nodes are in an autoscaling group, or any other setup where you don't have fixed IP addresses for your Zookeeper servers.
Usage:
exhibitor2dns --zone=yourzone.example.com \
--exhibitor_url=http://your-exhibitor-endpoint.example.com/ \
--rr=zookeeper
exhibitor2dns uses Boto to interact with Route53, so you have various options
for providing aws credentials. You can set AWS_ACCESS_KEY_ID and
AWS_SECRET_ACCESS_KEY envivonment variables, or if exhibitor2dns is running
on an ec2 instance it will try to use the instance's IAM role if there is one
available. See the Boto documentation for more details.