Validating Templates
Explore how to effectively validate AWS CloudFormation templates using CFN Lint, yamllint, and SAM CLI validation tools. Understand the importance of catching errors early to prevent costly deployment failures and speed up your serverless development process.
We'll cover the following...
YAML makes it easy to read CloudFormation template files but is very fiddly and error-prone. Small spacing issues can cause problems and that might not be immediately obvious when you read a template. CloudFormation will try deploying resources even when the template is not fully valid and then fail when it starts processing an invalid resource, so feedback on errors might take a long time with complex templates. One of the projects I work on includes custom DNS setup for a content delivery ...