How to deal with Redis connection errors?

[dmattia]

• I'm submitting a ...
  [ ] bug report
  [ ] feature request
  [ ] question about the decisions made in the repository
  [x] question about how to use this project

• Summary

How do we support error handling for when a Redis backend is unavailable? Ideally, we'd like to turn off rate limiting if Redis cannot be reached, or otherwise to switch to an in memory backend store. We'd also like to be alerted anytime Redis wasn't reachable.

• Other information (e.g. detailed explanation, stacktraces, related issues, suggestions how to fix, links for us to have context, eg. StackOverflow, personal fork, etc.)
  n/a