Mongotune uses setUserWriteBlockMode to block user writes to MongoDB when disk usage is near capacity. The first rollout will require users to reach out to support when they run out of disk space if they don't have auto-scaling enabled. An improvement to the experience will be to let customers self-serve by dropping indexes and collections.

Note: deleting documents can actually increase disk usage so we explicitly do not want to allow delete operations.

We should implement a solution that doesn't conflict with mongotune usage of setUserWriteBlockMode.