Server crontab (scheduler)

Rackspace has a specific need to provide scheduled backups to its customers. This is a specific example of a more general requirement for servers (instances) to have scheduled operations. This blueprint proposes an API for defining and maintaining a schedule, similar to a *nix crontab, of events to be performed on behalf of a server. For example, /servers/1234/schedule would define the scheduled events for server #1234. The API will permit users and administrators to manage schedules on behalf of a server. An event schedule of "NOW" could conceivably replace the current /servers/{id}/action API function in the future.