GCP Cloud Run service scenarios to connect to Cloud SQL with 'Access Denied' scenarios despite correct IAM roles
I'm working on a personal project and I'm working with an scenario where my GCP Cloud Run service is unable to connect to a Cloud SQL instance. Despite setting the correct IAM roles, I keep receiving an 'Access Denied' behavior when trying to establish the connection. I've configured the Cloud SQL instance to allow connections from my Cloud Run service, and I've verified that the service account attached to the Cloud Run service has the 'Cloud SQL Client' role. Here is the relevant part of my `Dockerfile`: ```Dockerfile FROM gcr.io/google.com/cloudsdktool/google-cloud-cli:alpine COPY . /app WORKDIR /app RUN pip install -r requirements.txt CMD ["python", "your_script.py"] ``` In my Python code, I'm using the `mysql-connector-python` library to connect: ```python import mysql.connector db_config = { 'user': 'your_user', 'password': 'your_password', 'host': '/cloudsql/your-cloudsql-connection-string', 'database': 'your_database' } try: connection = mysql.connector.connect(**db_config) print("Connection successful!") except mysql.connector.behavior as err: print(f"behavior: {err}") ``` I've also ensured that the connection string is correct and matches the format expected for the Cloud SQL instance. For Cloud Run, I've specified the environment variable `CLOUD_SQL_CONNECTION_NAME` as `project-id:region:instance-id` and used it in my code to set the 'host'. However, when I run the Cloud Run service, I see an behavior in the logs that states: ``` Access denied for user 'your_user'@'%' (using password: YES) ``` This indicates that the user doesn't have permission to access the database, but I've double-checked the IAM roles and permissions for the service account. I've also confirmed that the user exists in the Cloud SQL instance with the correct privileges. Could someone guide to figure out what might be wrong? I've tried redeploying the service, checking the database user permissions, and reconfiguring the IAM roles, but nothing seems to work. Am I approaching this the right way?