Add separate config for RS Redis

app/models/setting.rb

@@ -12,7 +12,7 @@ class Setting < RailsSettings::Base
   # Internal services
   #
 
-  field :redis_url, type: :string, readonly: true,
+  field :redis_url, type: :string,
     default: ENV["REDIS_URL"] || "redis://localhost:6379/0"
 
   #
@@ -131,4 +131,7 @@ class Setting < RailsSettings::Base
 
   field :rs_storage_url, type: :string,
     default: ENV["RS_STORAGE_URL"].presence
+
+  field :rs_redis_url, type: :string,
+    default: ENV["RS_REDIS_URL"] || "redis://localhost:6379/1"
 end

app/views/admin/settings/services/_remotestorage.html.erb

@@ -11,7 +11,11 @@
   <% if Setting.remotestorage_enabled? %>
     <%= render FormElements::FieldsetResettableSettingComponent.new(
           key: :rs_storage_url,
-          title: "Storage URL"
+          title: "Storage Base URL"
+        ) %>
+    <%= render FormElements::FieldsetResettableSettingComponent.new(
+          key: :rs_redis_url,
+          title: "Redis URL"
         ) %>
   <% end %>
 </ul>