While Cloud Functions can be triggered by major Cloud Storage events, like an object being created or deleted, the function can also be executed on changes to various aspects of the object’s status, as represented by updates to its metadata. In this hands-on lab, you’ll create a Cloud Function with a Cloud Storage trigger that watches for changes to a bucket’s objects’ metadata and outputs the result of that change.
Successfully complete this lab by achieving the following learning objectives:
- Enable APIs
Enable the APIs necessary for creating a Cloud Function (1st gen).
- Create and Populate a Cloud Storage Bucket
Create a bucket and upload a file into the bucket.
- Create a Cloud Function
Create a Cloud Function that is triggered by a change to the Cloud Storage metadata and outputs the filename and hold status of the object modified.
- Test the Cloud Function
Verify that the Cloud Function is correctly outputting the hold status for the object.