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AWS Certified DevOps Engineer - Professional · AWS
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Require CloudFormation init for cfn-init and cfn-hup https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/cfn-hup.html https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-init.html
Use the AWS::CloudFormation::Init type to include metadata on an Amazon EC2 instance for the cfn-init helper script. If your template calls the cfn-init script, the script looks for resource metadata rooted in the AWS::CloudFormation::Init metadata key. Reference: https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-init.html