Deploying a cron definition

A cron.yaml definition file is a type of deployable and therefore can be deployed to App Engine in the same manner as a service with gcloud. To deploy a cron.yaml, simply run:

gcloud app deploy cron.yaml

Services running in the standard environment can be configured to restrict access to cron endpoints by specifying login: admin on the handler for the target URL. Additionally, an X-Appengine-Cron header will be provided for all requests from the cron service. This header will be stripped from all other requests, making it a feasible way to validate cron requests for services running in the flexible environment.