CloudFormation: Infrastructure as Code Explained

CloudFormation lets you define your entire AWS infrastructure in a text file. I moved from manually clicking through the console to writing templates, and it changed everything. You write YAML or JSON templates that describe resources like EC2 instances, S3 buckets, and databases. CloudFormation provisions everything in the right order with dependencies handled automatically. If something fails, it rolls back. This infrastructure as code approach means you can version control your infrastructure, review changes, and replicate environments easily.