Add sentinel support

[garyburd]

http://redis.io/topics/sentinel-clients

I have a rough plan in mind on how to implement sentinel support, but I have not done it yet because I don't need it.

[simonklee]

I haven't really looked into the details of how Redis-sentinel works, but could use a sentinel aware client. What are your ideas on how to implement this. I wonder if it could be done quite ad-hoc albeit like what redis-py just merged [1].

[1] redis/redis-py@89d88d6

[garyburd]

To be honest, I forgot what my plan was. The redis;py client looks reasonable.

I don't have immediate plans to work on this.

[simonklee]

Thanks for the response. I'll might make it my next weekend project.

[hbcheng]

Hi, this feature is something that would improve our deployment and I'm willing to help out on this. Seeing as there hasn't been any noise on this in some time, I was wondering if:

a) There is any existing work on this that you or any of the contributors are aware of, and

b) If your thoughts on design or implementation have changed in the ~year and a half since this was last discussed.

[garyburd]

For those following along on the issue tracker, @hbcheng is now taking a look at this feature.

[hbcheng]

Pull request is submitted, pr #120.

[garyburd]

I have no plans to add this feature. See the related projects list for sentinel implementations.