Effective DevOps with AWS - Second Edition

Change sets

Our template only includes a web server and a security group that makes updating CloudFormation a fairly harmless operation. Furthermore, our change was fairly trivial, as AWS could simply update the existing security group, as opposed to having to replace it. As you can imagine, as the architecture becomes more and more complex, so does the CloudFormation template. Depending on the update you want to perform, you might encounter unexpected changes when you review the change set in the final step of updating a template. AWS offers an alternative and safer way to update templates; this feature is called change sets and is accessible from the CloudFormation console. Follow this procedure in order to use change sets to review the ...