Accessing Google Cloud Storage Bucket From Cloud Functions Throws 500 Error

I'm trying to access google cloud storage bucket from cloud functions (python) instance and it's throwing mystic 500 error. I have given the service account editor role too. It d

Solution 1:

The error you are getting it's because your Cloud Functions service account doesn't have the cloudfunctions.serviceAgent role. As you can see on the documentation:

Authenticating as the runtime service account from inside your function may fail if you change the Cloud Functions service account's permissions.

However, I found that sometimes you can not add this role as it doesn't show up as an option. I have reported this issue to the Google Cloud Functions engineering team and they are working to solve it.

Nevertheless, you can add the role again using thisgcloud command:

gcloud projects add-iam-policy-binding <project_name> --role=roles/cloudfunctions.serviceAgent --member=serviceAccount:service-<project_number>@gcf-admin-robot.iam.gserviceaccount.com