Cloud SQL Proxy Dial Error

Google Cloud Database
2

Given the details you’ve provided, it appears that the cloud-sql-proxy is struggling to establish a connection to your db1 instance. This could be attributed to several factors. Let’s break them down and provide a systematic approach to troubleshooting:

Potential Causes:

  • Firewall Restrictions: A firewall rule might be blocking traffic from your proxy to the db1 instance.
  • Network Issues: There could be a network-related problem preventing the proxy from accessing the db1 instance.
  • Proxy Configuration: There might be a misconfiguration in the cloud-sql-proxy settings.

Troubleshooting Steps:

  1. Verify Firewall Rules: Check the firewall settings in your Google Cloud Console to ensure that traffic from your proxy’s IP is allowed to reach the db1 instance.
  2. Try a Direct Connection: Try connecting directly to the db1 instance from your machine. If this works, it indicates that the network path is clear, and the issue likely lies with the cloud-sql-proxy configuration.
  3. Check Proxy Logs: Examine the cloud-sql-proxy logs for any specific error messages or indications that might point to the root cause. The logs can provide valuable insights into connection failures.
  4. Check Service Account Permissions: If you’re using a service account with the proxy, ensure it has the necessary permissions (Cloud SQL Client role at a minimum) to connect to the db1 instance.

Additional Considerations:

  • Private IP Address: The cloud-sql-proxy typically uses the database instance’s private IP for connections. Ensure you’re on the same network or VPC as the db1 instance.
  • VPN Configurations: If you’re connecting via a VPN, ensure it’s configured to allow traffic to the db1 instance’s private IP.
  • Proxy Server: If there’s an intermediary proxy server, ensure it’s set up to forward traffic correctly to the db1 instance’s private IP.

Conclusion:

Given that you can connect directly to the db1 instance and considering the provided logs, it’s highly probable that the issue lies within the cloud-sql-proxy configuration or its interaction with the network.

Here are some specific things you can try:

  • Check the firewall rules for your network to make sure that traffic to the db1 instance is allowed.
  • Try connecting to the db1 instance using a different computer or network.
  • Reconfigure the cloud-sql-proxy settings according to the documentation.