Add logging code for LDAP keys

lib/gitlab/ldap/access.rb

@@ -63,13 +63,20 @@ module Gitlab
         ldap_user = Gitlab::LDAP::Person.find_by_dn(user.extern_uid)
 
         user.keys.ldap.where.not(key: ldap_user.ssh_keys).each do |deleted_key|
-          deleted_key.destroy
+          Rails.logger.info "#{self.class.name}: removing LDAP SSH key #{deleted_key.key} from #{user.name} (#{user.id})"
+          unless deleted_key.destroy
+            Rails.logger.error "#{self.class.name}: failed to remove LDAP SSH key #{key.inspect} from #{user.name} (#{user.id})"
+          end
         end
 
         (ldap_user.ssh_keys - user.keys.ldap.pluck(:key)).each do |key|
+          Rails.logger.info "#{self.class.name}: adding LDAP SSH key #{key.inspect} to #{user.name} (#{user.id})"
           new_key = LDAPKey.new(title: "LDAP - #{Gitlab.config.ldap['sync_ssh_keys']}", key: key)
           new_key.user = user
-          new_key.save
+          unless new_key.save
+            Rails.logger.error "#{self.class.name}: failed to add LDAP SSH key #{key.inspect} to #{user.name} (#{user.id})\n"\
+              "error messages: #{new_key.errors.messages}"
+          end
         end
       end