如何添加自定义配置，例如 symfony2中的host_name =“www.abc.com”？

how to add custom configuration e.g. host_name = "www.abc.com" in symfony2 ? I know we can access the hostname using request object but I want the host name in symfony CLI custom command.

http://symfony.com/doc/current/cookbook/console/sending_emails.html

parameters:
    router.request_context.host: example.org
    router.request_context.scheme: https
    router.request_context.base_url: my/path

$context = $this->getContainer()->get('router')->getContext();

worked.