Add Prometheus metrics to track reCAPTCHA success/failures

1 files changed, 19 insertions, 1 deletions

diff --git a/app/controllers/sessions_controller.rb b/app/controllers/sessions_controller.rb
index 7aa277b3614..1de6ae24622 100644
--- a/app/controllers/sessions_controller.rb
+++ b/app/controllers/sessions_controller.rb
@@ -62,7 +62,11 @@ class SessionsController < Devise::SessionsController
     return unless captcha_enabled?
     return unless Gitlab::Recaptcha.load_configurations!
 
-    unless verify_recaptcha
+    if verify_recaptcha
+      increment_successful_login_captcha_counter
+    else
+      increment_failed_login_captcha_counter
+
       self.resource = resource_class.new
       flash[:alert] = 'There was an error with the reCAPTCHA. Please solve the reCAPTCHA again.'
       flash.delete :recaptcha_error
@@ -71,6 +75,20 @@ class SessionsController < Devise::SessionsController
     end
   end
 
+  def increment_failed_login_captcha_counter
+    Gitlab::Metrics.counter(
+      :failed_login_captcha_total,
+      'Number of failed CAPTCHA attempts for logins'.freeze
+    ).increment
+  end
+
+  def increment_successful_login_captcha_counter
+    Gitlab::Metrics.counter(
+      :successful_login_captcha_total,
+      'Number of successful CAPTCHA attempts for logins'.freeze
+    ).increment
+  end
+
   def log_failed_login
     Gitlab::AppLogger.info("Failed Login: username=#{user_params[:login]} ip=#{request.remote_ip}")
   end