Resolved 502 Errors in GCP Deployment

📅 2024-02-19 — Session: Resolved 502 Errors in GCP Deployment

🕒 01:30–02:40
🏷️ Labels: GCP, Flask, 502 Error, Deployment, Oauth
📂 Project: Dev
⭐ Priority: MEDIUM

Session Goal

The goal of this session was to troubleshoot and resolve 502 Bad Gateway errors occurring during a Google Cloud Platform (GCP) application deployment using Flask and Gunicorn.

Key Activities

• Troubleshooting 502 Errors: Addressed issues related to dependency management, Gunicorn configuration, filesystem permissions, session management, environment variables, and compatibility.
• Read-Only File System Management: Implemented solutions for handling read-only file systems in Google App Engine, focusing on session management and data storage.
• Function Adaptation: Adapted the record_interaction function for GCP, utilizing the /tmp directory for temporary storage and exploring permanent alternatives.
• Module and File Handling: Managed Python modules and file writing solutions to avoid read-only filesystem issues, ensuring proper module versions and directory permissions.
• Dependency Management: Updated requirements.txt with specific versions to ensure compatibility and prevent deployment issues.
• Login Redirection Analysis: Analyzed and resolved login redirection issues due to invalid URLs in the application.

Achievements

• Successfully identified and resolved causes of 502 errors related to missing dependencies and file system issues.
• Implemented a writable directory solution for file handling in GCP.
• Updated requirements.txt for compatibility with the base2 environment.
• Resolved login redirection issues and improved OAuth redirect handling in Flask.

Pending Tasks

• Further testing of the updated requirements.txt for compatibility before full deployment.
• Continuous monitoring of the application for any recurring 502 errors or login issues.