GCP Cloud SQL Connection Timeout When Using Flask and SQLAlchemy with Connection Pooling
After trying multiple solutions online, I still can't figure this out. I'm experiencing connection timeouts when trying to connect to my GCP Cloud SQL instance using Flask and SQLAlchemy. I've set up my Flask application to use a connection pool, but I keep getting the following behavior after a few seconds of inactivity: ``` OperationalError: (psycopg2.OperationalError) timeout expired ``` I've tried adjusting the connection pool settings, but it doesn't seem to resolve the scenario. Here’s the relevant part of my code where I configure SQLAlchemy: ```python from flask import Flask from flask_sqlalchemy import SQLAlchemy app = Flask(__name__) app.config['SQLALCHEMY_DATABASE_URI'] = 'postgresql://user:password@your-cloud-sql-ip:5432/dbname' app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False app.config['SQLALCHEMY_ENGINE_OPTIONS'] = { 'pool_size': 10, 'pool_timeout': 30 } db = SQLAlchemy(app) ``` I've confirmed that I can connect to the database from my local machine using the same credentials and IP. I also increased the `pool_timeout` to 60 seconds, but the scenario continues. The connection string is correct, and I verified that the Cloud SQL instance is set to allow connections from my server's IP address. Could this question be related to the way the connection pool is being managed in SQLAlchemy or any specific settings in Google Cloud SQL? Any insights or suggestions to troubleshoot this would be greatly appreciated! Any help would be greatly appreciated!