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 that can be reused before building production ETL workloads. Requirements AWS account AWS Glue A private database such as Amazon RDS, Aurora, PostgreSQL, MySQL, SQL Server, or Oracle VPC, private subnets, and security groups IAM role for AWS Glue Basic knowledge of JDBC connections The proposed architecture The idea is simple. AWS Glue will run inside a VPC-connected environment and use a Glue Connection to reach a private database endpoint.…