AWS S3 does all the heavy lifting of replicating the contents of one bucket to another. We just have to define what and where we want to replicate and set up all the permissions correctly. It is important to replicate to a separate account that is completely disconnected from any other accounts to ensure that a breach in another account does not impact the recovery account. To simplify this recipe, we will use a single account, but this does not change the CloudFormation templates other than the account number value. It is also a good idea to replicate into a region that you are not otherwise using, so that an outage in one of your regions does not also mean there is an outage in your recovery region. Next, we need to create ...
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