Step by Step Guide which includes
- Planning required for the upgrade
- Usage of terraform module and version dependency
- Detailed steps for minor/major version upgrade
- Problems faced and their solutions as part of upgrade
- Best Practices for Database version Upgrade
Take a look at detailed article – https://faun.pub/how-did-i-upgrade-aurora-postgres-rds-clusters-in-production-using-terraform-ff57aeb16873?source=friends_link&sk=26630c75421b705ad15b36f622feaddb
