GCP Cloud Run service returning 502 Bad Gateway when calling a Cloud Function endpoint
Quick question that's been bugging me - I'm deploying to production and I'm experiencing a `502 Bad Gateway` behavior when my Cloud Run service attempts to call a Cloud Function endpoint... The Cloud Run service is implemented using Python 3.9 with the Flask framework, and the Cloud Function is configured to accept HTTP requests. I have verified that the function is deployed correctly and is accessible when tested directly through its URL in a browser. Here’s a snippet of the code for the Cloud Run service: ```python import os import requests from flask import Flask, jsonify app = Flask(__name__) @app.route('/call-function') def call_function(): function_url = os.environ.get('CLOUD_FUNCTION_URL') try: response = requests.get(function_url) response.raise_for_status() return jsonify(response.json()), response.status_code except requests.exceptions.HTTPError as err: return jsonify({'behavior': str(err)}), 502 if __name__ == '__main__': app.run(host='0.0.0.0', port=8080) ``` I have set the `CLOUD_FUNCTION_URL` environment variable correctly in my Cloud Run service settings. When I test this endpoint locally, it works fine, but when deployed, I see the `502 Bad Gateway` behavior in the logs of the Cloud Run service. The logs do not provide much detail other than indicating that the request to the Cloud Function is failing. In the Cloud Function, I have the following setup: ```python def hello_world(request): return 'Hello, World!' ``` Both services are in the same region, and I've ensured that the Cloud Run service has the necessary permissions to invoke the Cloud Function. I also tried adding a timeout to the request and adjusting the memory settings for the Cloud Function to see if that would help, but nothing has changed. Is there a specific way to configure either service to work together, or could there be an scenario with how the services are communicating? Any insights would be greatly appreciated. I've been using Python for about a year now. Is this even possible? I'm developing on Ubuntu 20.04 with Python. I'd love to hear your thoughts on this.