Add Let's Encrypt client

Part of adding Let's Encrypt certificates for pages domains

Add acme-client gem

Client is being initialized by private key stored in secrets.yml
Let's Encrypt account is being created lazily.
If it's already created, Acme::Client just gets account_kid by
calling new_account method

Make Let's Encrypt client an instance
Wrap order and challenge classes

1 files changed, 7 insertions, 0 deletions

diff --git a/app/controllers/admin/application_settings_controller.rb b/app/controllers/admin/application_settings_controller.rb
index d445be0eb19..d5bc723aa8c 100644
--- a/app/controllers/admin/application_settings_controller.rb
+++ b/app/controllers/admin/application_settings_controller.rb
@@ -89,6 +89,13 @@ class Admin::ApplicationSettingsController < Admin::ApplicationController
     )
   end
 
+  # Getting ToS url requires `directory` api call to Let's Encrypt
+  # which could result in 500 error/slow rendering on settings page
+  # Because of that we use separate controller action
+  def lets_encrypt_terms_of_service
+    redirect_to ::Gitlab::LetsEncrypt.terms_of_service_url
+  end
+
   private
 
   def set_application_setting