title: easiest way to schedule a Google Cloud Dataflow job
body: <p>I just need to run a dataflow pipeline on a daily basis, but it seems to me that suggested solutions like App Engine Cron Service, which requires building a whole web app, seems a bit too much.
  I was thinking about just running the pipeline from a cron job in a Compute Engine Linux VM, but maybe that's far too simple :). What's the problem with doing it that way, why isn't anybody (besides me I guess) suggesting it?</p>