Inconsistency between postgress password key for langfuse pods and postgress pods.

[JSchuurmans]

Issue

Inconsistency between the environment variable DATABASE_PASSWORD (used in langfuse-web and langfuse-worker pods) and secret key used in subcharts of postgres.

Cause

The subchart of postgres modifies the secret key, by pre-pending the user name to the key. By default the username is postgres so it prepends with postgres-.
This results in a mismatch with the environment variables used in the langfuse-web and langfuse-worker pods, which only uses the userPasswordKey.

Suggestion

Prepend the PostgreSQL user name to the password's key in the environment variable DATABASE_PASSWORD: <username>-<userPasswordKey>.

[JSchuurmans]

This post might elaborate the error further:

If I use a secret with key password, then the postgres pod fails because it expects secret key: <username>-<key>.
If I use a secret with key postgres-password (postgres is default username), then the langfuse-web and langfuse-worker pods fail to authenticate to postgres. Because the langfuse-web and langfuse-worker pods only use the userPasswordKey.

[JSchuurmans]

@Steffen911 Thank you for referring to the minimal installation example. I can highly recommend that people read it.

I noticed that I only set the userPasswordKey, while the values.yaml example also provides adminPasswordKey. If adminPasswordKey is provided, no patches are needed.