Just want to add that I've found the problem, in case anyone is curious. It was a line that I added to the .dockerignore file. I'm not sure why. It has an interesting and potentially very expensive (due to 10 minute penalty for creating an instance) effect. Instances keep getting created and deleted every 1-2 minutes perpetually, until the module is manually deleted.
$ cat vm/.dockerignore .dockerignore Dockerfile app.yaml -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to google-appengine+unsubscr...@googlegroups.com. To post to this group, send email to google-appengine@googlegroups.com. Visit this group at http://groups.google.com/group/google-appengine. To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/47c2cbac-c135-4abf-8252-071faa11cb08%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.