conf: add redis

Gemfile

@@ -74,6 +74,7 @@ gem 'rack-attack'
 gem 'rails-i18n' # Locales par défaut
 gem 'rake-progressbar', require: false
 gem 'redcarpet'
+gem 'redis'
 gem 'rexml' # add missing gem due to ruby3 (https://github.com/Shopify/bootsnap/issues/325)
 gem 'rqrcode'
 gem 'saml_idp'

Gemfile.lock

@@ -171,6 +171,7 @@ GEM
     coercible (1.0.0)
       descendants_tracker (~> 0.0.1)
     concurrent-ruby (1.2.2)
+    connection_pool (2.4.1)
     content_disposition (1.0.0)
     crack (0.4.5)
       rexml
@@ -561,6 +562,10 @@ GEM
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     redcarpet (3.6.0)
+    redis (5.0.6)
+      redis-client (>= 0.9.0)
+    redis-client (0.14.1)
+      connection_pool
     regexp_parser (2.8.1)
     request_store (1.5.0)
       rack (>= 1.4)
@@ -893,6 +898,7 @@ DEPENDENCIES
   rails-i18n
   rake-progressbar
   redcarpet
+  redis
   rexml
   rqrcode
   rspec-rails

config/env.example.optional

@@ -207,3 +207,8 @@ COJO_JWT_RSA_PRIVATE_KEY=""
 COJO_JWT_ISS=""
 
 API_COJO_URL=""
+
+# Use redis as primary rails cache store, file system otherwise
+REDIS_CACHE_URL=""
+REDIS_CACHE_SSL="enabled"
+REDIS_CACHE_SSL_VERIFY_NONE="enabled"

config/environments/development.rb

@@ -25,7 +25,11 @@
     config.action_controller.perform_caching = true
     config.action_controller.enable_fragment_cache_logging = true
 
-    config.cache_store = :memory_store
+    if ENV['REDIS_CACHE_URL'].present?
+      config.cache_store = :redis_cache_store, { url: ENV['REDIS_CACHE_URL'] }
+    else
+      config.cache_store = :memory_store
+    end
     config.public_file_server.headers = {
       'Cache-Control' => "public, max-age=#{2.days.to_i}"
     }

config/environments/production.rb

@@ -61,7 +61,20 @@
   # config.logger = ActiveSupport::TaggedLogging.new(SyslogLogger.new)
 
   # Use a different cache store in production.
-  # config.cache_store = :mem_cache_store
+  if ENV['REDIS_CACHE_URL'].present?
+    redis_options = { url: ENV['REDIS_CACHE_URL'] }
+    redis_options[:ssl] = (ENV['REDIS_CACHE_SSL'] == 'enabled')
+    if ENV['REDIS_CACHE_SSL_VERIFY_NONE'] == 'enabled'
+      redis_options[:ssl_params] = { verify_mode: OpenSSL::SSL::VERIFY_NONE }
+    end
+
+    redis_options[:error_handler] = -> (method:, returning:, exception:) {
+      Raven.capture_exception exception, level: 'warning',
+        tags: { method: method, returning: returning }
+    }
+
+    config.cache_store = :redis_cache_store, redis_options
+  end
 
   # Use a real queuing backend for Active Job (and separate queues per environment).
   config.active_job.queue_adapter = :delayed_job