1 files changed, 50 insertions, 0 deletions
diff --git a/lib/gitlab/config_checker/puma_rugged_checker.rb b/lib/gitlab/config_checker/puma_rugged_checker.rb
new file mode 100644
index 00000000000..a9bbaebaf0b
--- /dev/null
+++ b/lib/gitlab/config_checker/puma_rugged_checker.rb
@@ -0,0 +1,50 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module ConfigChecker
+    module PumaRuggedChecker
+      extend self
+      extend Gitlab::Git::RuggedImpl::UseRugged
+
+      def check
+        return [] unless Gitlab::Runtime.puma?
+
+        notices = []
+
+        link_start = '<a href="https://docs.gitlab.com/ee/administration/operations/puma.html">'
+        link_end = '</a>'
+        notices << {
+          type: 'info',
+          message: _('You are running Puma, which is currently experimental. '\
+                   'More information is available in our '\
+                   '%{link_start}documentation%{link_end}.') % { link_start: link_start, link_end: link_end }
+        }
+
+        if running_puma_with_multiple_threads?
+          link_start = '<a href="https://docs.gitlab.com/ee/administration/operations/puma.html">'
+          link_end = '</a>'
+          notices << {
+            type: 'info',
+            message: _('Puma is running with a thread count above 1. '\
+                     'Information on deprecated GitLab features in this configuration is available in the '\
+                     '%{link_start}documentation%{link_end}.') % { link_start: link_start, link_end: link_end }
+          }
+        end
+
+        if running_puma_with_multiple_threads? && rugged_enabled_through_feature_flag?
+          link_start = '<a href="https://docs.gitlab.com/ee/administration/operations/puma.html#performance-caveat-when-using-puma-with-rugged">'
+          link_end = '</a>'
+          notices << {
+            type: 'warning',
+            message: _('Puma is running with a thread count above 1 and the rugged '\
+                     'service is enabled. This may decrease performance in some environments. '\
+                     'See our %{link_start}documentation%{link_end} '\
+                     'for details of this issue.') % { link_start: link_start, link_end: link_end }
+          }
+        end
+
+        notices
+      end
+    end
+  end
+end