I also asked a local instance of the Mixtral llm:

Database URL Format: The DB_URL in the .env file is defined as 192.168.0.89:8765, which is unusual for a PostgreSQL connection. PostgreSQL typically uses a connection string format, not a URL starting with http://. The correct format for a PostgreSQL connection string usually looks like: postgresql://username:password@hostname:port/data…. Changing the DB_URL to match this format might resolve the issue of the application not recognizing the username.

Environment Variable Consistency: Ensure that all references to the database, Redis, and other services within both the .env file and the Docker Compose file are consistent with the new names and ports. This includes checking that the DB_HOSTNAME and REDIS_HOSTNAME in the .env file match the container_name of the services in the Docker Compose file.

PostgreSQL Connection String in Docker Compose: The environment variables for the Immich services in the Docker Compose file are focused on POSTGRES_USER, POSTGRES_PASSWORD, and POSTGRES_DB. If Immich constructs its own connection string internally using these components, ensure they’re correctly configured. However, it might be worth directly specifying a full connection string (if supported by Immich) that includes the username, password, host, and database in a single variable, to reduce the chance of misconfiguration.

Network Configuration: Verify that Docker’s network configuration hasn’t been altered in a way that would prevent containers from communicating properly. Docker Compose services communicate over a default network, but if you’ve made network modifications, ensure that these don’t inadvertently block connections between services.