cloud.gov offers Redis 2.8 as a service. This service is still in Alpha mode: downtime and data loss is possible.
||Redis instance with several GB storage||Free in Alpha|
How to create an instance
To create a service instance run the following command:
cf create-service redis28 standard my-redis-service
You can rotate credentials by creating a new instance and deleting the existing instance. If this is not an option, email cloud.gov support to request rotating the credentials manually.
The broker in GitHub
You can find the broker here: https://github.com/18F/kubernetes-broker.