Backup not uploading to Google Drive no failure message either

[omriasta]

Describe the bug

Google Drive setup was done from the instructions I saw, created service account etc.
To Reproduce
Steps to reproduce the behavior:

1. ... Created the service account
2. ...Shared a new empty folder with the service account
3. ...Listed the folder id in the env file
4. ...I am using the email address of the service account in the Impersonate_Subject field (this wasn't clear, I also tried my personal gmail account but that fails)

Expected behavior

The logs state that the file was uploaded but nothing is uploaded
Version (please complete the following information):

• Image Version:
• Docker Version:
• Docker Compose Version (if applicable):
  Using the "latest" tag
  Additional context

Here are the logs I see:

backup-1     | time=2026-06-10T19:04:02.008Z level=INFO msg="Removed tar file `/tmp/postgres-backup-2026-06-10T19-04-00.tar.gz`."
backup-1     | time=2026-06-10T19:06:00.048Z level=INFO msg="Now running script on schedule 0 */2 * * * *"
backup-1     | time=2026-06-10T19:06:00.077Z level=INFO msg="Created backup of `/backup/postgres_data` at `/tmp/postgres-backup-2026-06-10T19-06-00.tar.gz`."
**backup-1     | time=2026-06-10T19:06:00.080Z level=INFO msg="Starting upload for backup 'postgres-backup-2026-06-10T19-06-00.tar.gz'." storage=GoogleDrive**
backup-1     | time=2026-06-10T19:06:00.086Z level=INFO msg="Stored copy of backup `/tmp/postgres-backup-2026-06-10T19-06-00.tar.gz` in `/archive`." storage=Local
backup-1     | time=2026-06-10T19:06:53.593Z level=INFO msg="None of 4 existing backups were pruned." storage=Local
**backup-1     | time=2026-06-10T19:06:53.806Z level=INFO msg="None of 0 existing backups were pruned." storage=GoogleDrive**
backup-1     | time=2026-06-10T19:06:53.807Z level=INFO msg="Removed tar file `/tmp/postgres-backup-2026-06-10T19-06-00.tar.gz`."

[omriasta]

After looking around a bit, it appears that Service accounts can't write to personal google drive accounts and that oauth needs to be used for this purpose. I am not sure if this info should be added to the documentation or if there is a plan to implement oauth for Google Drive.

[m90]

Thanks for raising this. I recently deleted my Google Account, so it's a bit unfortunate I can't test any of this. Your proposal of adding the limitation to the docs sounds like a very good idea. That being said I'd be afraid I might not be the best person to do this as I'm totally out of the loop when it comes to Google Workspace Lingo. Would you mind adding it in case you find the time?