How to automatically patch EC2 instances created from CloudFormation Stacks using SSM patch manager

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We have EC2 instances created via CloudFormation. If we use SSM patch manager to automatically patch these instances, will that cause drifts to the CF stack?

AWS2024
asked a month ago135 views
1 Answer
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Accepted Answer

Hello.

CloudFormation drift checks differences in AWS settings (instance type, EBS type, etc.), so drift does not occur with information inside the EC2 OS.
https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-stack-drift.html

CloudFormation detects drift on those AWS resources that support drift detection. Resources that don't support drift detection are assigned a drift status of NOT_CHECKED. For a list of AWS resources that support drift detection, see Resources that support import and drift detection operations.

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answered a month ago

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