AWS Elasticache Redis encryption

[edulop91]

I might be wrong here, but looks like aws elasticache redis only allows encryption when replicated or in cluster mode. Fleet currently uses redigo which does not support clustering.

Couple options I can think of:

• aws elasticache redis encryption already works and I have not been able to find the appropriate configuration
• add a secret server side to do encryption/authentication
• upgrade redigo to another library that does allow use of cluster mode and replicated redis

If one of the latter two, let me know if there's a preference and I can contribute some code here :slightly_smiling_face:

[zwass]

I would be happy to review a PR adding Redis cluster support.