Troubleshooting AWS Glue Connection to MySQL on EC2 with IP Whitelisting

To troubleshoot your AWS Glue connection to a MySQL database on an EC2 instance with IP whitelisting, you'll need to address several potential issues:

1. Security Group Configuration: Ensure that the security group associated with your EC2 instance allows inbound traffic on the MySQL port (typically 3306) from the AWS Glue service. You may need to add the IP ranges used by AWS Glue in your region to the security group's inbound rules.

2. Network Configuration: Verify that your EC2 instance is in a subnet that AWS Glue can access. If your instance is in a private subnet, you might need to set up a NAT gateway or VPC endpoints to allow communication between AWS Glue and your VPC.

3. IP Whitelisting: Since you mentioned IP whitelisting is required, make sure the IP ranges used by AWS Glue in your region are added to the MySQL server's whitelist. You can find these IP ranges in the AWS documentation.

4. JDBC Connection URL: Double-check that the JDBC URL in your AWS Glue connection is correctly configured with the proper host, port, and database name.

5. Database Credentials: Verify that the username and password specified in your AWS Glue connection are correct and have the necessary permissions to access the MySQL database.

6. VPC Configuration: Ensure that your VPC is properly configured to allow AWS Glue to access resources within it. This may involve setting up VPC endpoints for AWS Glue.

7. IAM Permissions: Check that the IAM role associated with your AWS Glue job has the necessary permissions to access the VPC and the required AWS services.

If you've verified all these settings and still can't connect, you can try the following additional steps:

1. Use the AWS Systems Manager AWSSupport-TroubleshootGlueConnection runbook to perform a comprehensive check of your connection settings.

2. Review the detailed results in the runbook's Outputs and complete any suggested actions.

3. If possible, try connecting to the MySQL database from another EC2 instance within the same VPC to isolate whether the issue is specific to AWS Glue or a general networking problem.

4. Check the AWS Glue logs for more detailed error messages that might provide additional clues about the connection failure.

If you continue to experience issues after trying these steps, it may be helpful to engage AWS support for more in-depth troubleshooting assistance, especially if you're new to AWS and working with complex networking configurations.
Sources
Troubleshooting connection issues in AWS Glue - AWS Glue
Troubleshoot external data source connections | AWS re:Post
Troublehsoot AWS Glue connection to a JDBC data source | AWS re:Post