Running a Tomcat App on ECS Fargate — A Complete Step-by-Step Guide

A guide walks through moving a Tomcat app to AWS ECS Fargate with a production-ready setup.

It recommends least-privilege security groups, Secrets Manager for credentials, and an ALB in front of the service.

PostgreSQL is provisioned on RDS, while Redis on ElastiCache stores shared sessions across tasks.

Auto Scaling and managed AWS services help keep the legacy Java web app secure, scalable, and easier to operate.