simple-cloud-functions-vm-controller

Prerequisite

In order to use Compute Engine API, please make sure that Compute Engine API is enabled: https://console.cloud.google.com/apis/api/compute.googleapis.com/overview?project=[PROJECT_ID]

Steps

1. Create an Compute Engine instance that would like to start / stop.
2. Create a Pub/Sub topic. When deploy Cloud Functions via Console (web UI), there is a button to create a topic.
3. Deploy Cloud Function. (alternatively: use make deploy as a prompt deploy command)
4. Set Cloud Scheduler.

Deploy

To use command line make deploy, Google Cloud SDK must be installed locally. (https://cloud.google.com/sdk/docs/install)

The command will prompt for these information:

Enter function name: # The name of entrypoint function
Enter project id   : # Project id, noted that it can be different from project name
Enter env file     : # A yaml file that contains environment variables (optional)
Enter cloud region : # A zone which the function will be deployed 
Enter runtime      : # Runtime, for python, use `python37` or `python38`
Enter topic name   : # A name of Cloud Pub/Sub topic for deploying pub/sub trigger function

Reference

• Google Cloud Functions example: https://github.com/GoogleCloudPlatform/python-docs-samples/blob/master/functions/helloworld/main.py
• Google Cloud Compute Engine API example: https://github.com/GoogleCloudPlatform/python-docs-samples/blob/master/compute/api/create_instance.py