Working with drifts

We covered drifts in the first chapter, CloudFormation Refresher. A drift is a change in a CloudFormation resource that was not applied by CloudFormation. Although most drifts are created by changes made in the AWS Console or API, some drifts appear even if we provision resources with CloudFormation.

Let's look at the example in the core stack. First, we need to deploy the stack:

$ aws cloudformation deploy \
                     --template-file core_full.yaml \
                     --stack-name core \
                     --parameter-overrides \
                ...