consolidate Redis initialzation to one place (#4182)

config/initializers/breakers.rb

@@ -28,9 +28,7 @@
 require 'evss/letters/service'
 
 # Read the redis config, create a connection and a namespace for breakers
-redis_config = Rails.application.config_for(:redis).freeze
-redis = Redis.new(redis_config[:redis])
-redis_namespace = Redis::Namespace.new('breakers', redis: redis)
+redis_namespace = Redis::Namespace.new('breakers', redis: Redis.current)
 
 services = [
   Appeals::Configuration.instance.breakers_service,

config/initializers/rack_attack.rb

@@ -1,8 +1,7 @@
 # frozen_string_literal: true
 
 class Rack::Attack
-  REDIS_CONFIG = Rails.application.config_for(:redis).freeze
-  Rack::Attack.cache.store = Rack::Attack::StoreProxy::RedisStoreProxy.new(Redis.new(REDIS_CONFIG[:redis]))
+  Rack::Attack.cache.store = Rack::Attack::StoreProxy::RedisStoreProxy.new(Redis.current)
 
   throttle('example/ip', limit: 1, period: 5.minutes) do |req|
     req.ip if req.path == '/v0/limited'

rakelib/connectivity.rake

@@ -7,10 +7,6 @@
 # Allows running on development machines
 Rails.logger = Logger.new(STDOUT)
 
-# For Rx/SM
-REDIS_CONFIG = Rails.application.config_for(:redis).freeze
-Redis.current = Redis.new(REDIS_CONFIG[:redis])
-
 class ConnectivityError < StandardError; end
 
 # Convenience function that runs a connectivity example and prints out