refactor to use REDIS_URL instead of REDIS_CACHE_STORE

* pin sidekiq to version
* to retain compatibility with redis 3.x (latest sidekiq requires redis 4.0+)

.env.sample

@@ -28,7 +28,7 @@ LOGIN_GOV_OPENID_CERT_URL='https://idp.int.identitysandbox.gov/api/openid_connec
 NEW_RELIC_KEY=YOUR-NEW-RELIC-KEY-HERE
 
 # Redis cache store
-REDIS_CACHE_STORE=redis://localhost:6379/1
+REDIS_URL=redis://localhost:6379/1
 
 # For image uploads
 S3_AWS_ACCESS_KEY_ID=

Gemfile

@@ -19,7 +19,7 @@ gem 'pg', '>= 0.18', '< 2.0'
 gem 'puma'
 gem 'rack-cors', require: 'rack/cors'
 gem 'sass-rails'
-gem 'sidekiq'
+gem 'sidekiq', '>= 4.2'
 gem 'uglifier'
 gem 'json-jwt'
 # Use Redis to cache Touchpoints in all envs

Gemfile.lock

@@ -359,7 +359,7 @@ DEPENDENCIES
   rspec_junit_formatter
   sass-rails
   selenium-webdriver
-  sidekiq
+  sidekiq (>= 4.2)
   tzinfo-data
   uglifier
   web-console (>= 3.3.0)

config/cable.yml

@@ -7,5 +7,5 @@ test: *redis
 
 production:
   adapter: redis
-  url: <%= ENV.fetch("REDIS_URL") { "redis://localhost:6379/1" } %>
+  url: <%= ENV.fetch("REDIS_URL") %>
   channel_prefix: touchpoints_production

config/environments/development.rb

@@ -10,7 +10,7 @@
   # Enable/disable caching. By default caching is disabled.
   # Run rails dev:cache to toggle caching.
   Rails.application.configure do
-    config.cache_store = :redis_cache_store, { url: ENV["REDIS_CACHE_STORE"] }
+    config.cache_store = :redis_cache_store, { url: ENV["REDIS_URL"] }
   end
 
   # Store uploaded files on the local file system (see config/storage.yml for options)

config/environments/production.rb

@@ -59,7 +59,7 @@
   # Use a different cache store in production.
   # config.cache_store = :mem_cache_store
   Rails.application.configure do
-    config.cache_store = :redis_cache_store, { url: ENV["REDIS_CACHE_STORE"] }
+    config.cache_store = :redis_cache_store, { url: ENV["REDIS_URL"] }
   end
 
   # Use a real queuing backend for Active Job (and separate queues per environment)

config/environments/staging.rb

@@ -59,7 +59,7 @@
   # Use a different cache store in production.
   # config.cache_store = :mem_cache_store
   Rails.application.configure do
-    config.cache_store = :redis_cache_store, { url: ENV["REDIS_CACHE_STORE"] }
+    config.cache_store = :redis_cache_store, { url: ENV["REDIS_URL"] }
   end
 
   # Use a real queuing backend for Active Job (and separate queues per environment)

config/initializers/sidekiq.rb

@@ -1,7 +1,7 @@
 Sidekiq.configure_server do |config|
-  config.redis = { url: ENV["REDIS_CACHE_STORE"], namespace: "touchpoints_sidekiq_#{Rails.env}" }
+  config.redis = { url: ENV["REDIS_URL"], namespace: "touchpoints_sidekiq_#{Rails.env}" }
 end
 
 Sidekiq.configure_client do |config|
-  config.redis = { url: ENV["REDIS_CACHE_STORE"], namespace: "touchpoints_sidekiq_#{Rails.env}" }
-end
+  config.redis = { url: ENV["REDIS_URL"], namespace: "touchpoints_sidekiq_#{Rails.env}" }
+end