Log to the file specified in .env does not work / getting permission denied error on startup

[whispertante]

Bug Description

I set the LANGFLOW_LOG_FILE in my .env file, however there is no logging in this file.
Instead, I am getting an error when starting langflow:
PermissionError: [Errno 13] Permission denied: '/usr/local/lib/python3.10/dist-packages/langflow/alembic/alembic.log'

This should be logged in my log file.

Reproduction

1. Go to the project folder and create .env file with this content:

# Config directory
LANGFLOW_CONFIG_DIR=config


# Save database in the config directory
LANGFLOW_SAVE_DB_IN_CONFIG_DIR=true

# Alternatively, you can directly set the database URL
# LANGFLOW_DATABASE_URL=sqlite:////<PATH>/langflow/langflow.db

LANGFLOW_LOG_FILE=langflow.log

2. Start langflow: python3 -m langflow --env-file .env
3. Error comes up

Expected behavior

Errors should be logged into the specified log file (where write access is available).

Who can help?

No response

Operating System

Ubuntu 22.04.5

Langflow Version

1.0.18

Python Version

3.10

Screenshot

No response

Flow File

No response

[dosubot]

Hey @whispertante! I'm here to help you with any bugs, questions, or contributions you have for Langflow. Let's tackle this issue together!

The PermissionError: [Errno 13] Permission denied occurs because the process does not have the necessary permissions to write to the specified log file. Here are steps to resolve this issue:

1. Check Permissions of the Log File and Directory:
   Ensure that the directory where the log file is being created has the appropriate write permissions for the user running the script.

   sudo chmod -R 755 /path/to/log/directory
   sudo chown -R your_user:your_group /path/to/log/directory

2. Verify Ownership:
   Make sure the log file and its parent directory are owned by the user running the script.

   ls -l /path/to/log/directory

3. Environment Variable:
   Ensure that the path specified in the .env file is correct and the directory exists with the right permissions. For example, in the .env file:

   LANGFLOW_LOG_FILE=/path/to/logs/langflow.log

4. Run with Sufficient Privileges:
   If necessary, run the script with elevated privileges (e.g., using sudo), but this should be done cautiously.

By ensuring the log file and its directory have the correct permissions and ownership, you should be able to resolve the PermissionError ^[1][2].

To continue talking to Dosu, mention @dosu.