In addition to wat Jason said, you might also want to take at the "includes" directive to avoid repeating yourself: https://cloud.google.com/appengine/docs/standard/python/config/appref
So you could do something like: - have a common "services.yaml" somewhere - in each of the dev / stage / prod yaml just put the information specific for that env and include the common services yaml Sidenote: we have a small helper script for our GAE projects so that we can do some more processing around running / deploying and we generate our app.yaml's dynamically: def _buildAppYamls(for_deployment): app_yaml_templates = _findInAppengineModules('app-template.yaml') for template in app_yaml_templates: content = _load(template) d = os.path.dirname(template) module = os.path.basename(d) if module != 'main': module_tag = 'service' if for_deployment else 'module' content = '%s: %s\n%s' % (module_tag, module, content) if not for_production: content = 'version: local-development\n' + content with open(os.path.join(d, 'app.yaml'), 'w') as f: f.write(content) -- 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 email@example.com. Visit this group at https://groups.google.com/group/google-appengine. To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/d92e5d69-5318-4efe-a1c3-8435e2efdb73%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.