docs: def configure(self, repositories):
          """Prepare the system to be ready for an undercloud installation.
          """
          self.enable_repositories(repositories)
          self.create_stack_user()
          self.install_base_packages()
          self.clean_system()
          self.yum_update(allow_reboot=True)
          self.install_osp()
          self.set_selinux('permissive')
          self.fix_hostname()