Potentally wrong data persistence warning in Heroku using a postgres add-on

[martibosch]

Describe the bug

When deploying Label Studio to Heroku using the one-click badge from the README, I get a "Data will be persisted on the node running this container, but all data will be lost if this node goes away." in the app. This seems to come from this line:
https://github.com/HumanSignal/label-studio/blob/heroku-persistent-pg/Dockerfile.heroku#L4

However, the Heroku Postgres add-on is properly installed as configured, I actually inspected the generated tables and everything seems fine. So I believe the message should just not appear.

To Reproduce

1. Go to https://www.heroku.com/deploy?template=https://github.com/HumanSignal/label-studio/tree/heroku-persistent-pg
2. Open the generated app
3. The message will appear

Expected behavior
No message about data persistence should appear.

Environment (please complete the following information):

• OS: Linux (Heroku Dyno)
• Label Studio Version: 1.16.0.dev0

[heidi-humansignal]

Hello,

Thanks for reporting this! It sounds like you’ve successfully connected Label Studio to a PostgreSQL add-on on Heroku, but you’re still seeing the “Data will be persisted on the node running this container...” message. That warning usually appears whenever Label Studio detects that you might be storing data locally on the ephemeral filesystem in addition to storing the database data in PostgreSQL.
Here’s what you can check:

1. Make sure you set the environment variable:

STORAGE_PERSISTENCE=1
This should remove the ephemeral storage warning in most cases.

Thank you,
Abu

Comment by Abubakar Saad
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