How to Test Private Database Access from AWS Glue Before Running ETL Jobs

When building ETL workloads in AWS, one of the first problems we usually face is not the transformation logic itself. It is connectivity. Before writing a complex ETL job, we need to confirm that AWS Glue can actually reach the source database, authenticate correctly, resolve the endpoint, and execute a basic query. In this article, we will configure an AWS Glue connection to a private database, attach the proper VPC networking, configure the Glue IAM role, and create a simple validation script