Roles and Tasks for CloudFormation Adoption

Answer - A and B.

Option A is CORRECT because subnets cannot be deleted with instances in them.

Option B is CORRECT because to launch instances explicitly, we need IAM permissions.

Option C is incorrect because the stacks are created using the application group's IAM policy when nesting network stacks within application stacks.

And the policy should require network-level permissions.

Option D is incorrect because the application stack can be deleted before the network stack.

Option E is incorrect because network administrators need resource-level permission to delete the application stack.

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The enterprise in question wants to use CloudFormation to automate administrative tasks and implement the security principles of least privilege and separation of duties. CloudFormation is a service provided by Amazon Web Services (AWS) that allows users to define and manage AWS resources as code.

The enterprise has identified various roles within the company, each with specific tasks related to CloudFormation:

A. Network stack updates will fail upon attempts to delete a subnet with EC2 instances.

This means that if there are EC2 instances running in a subnet that is being deleted, the update to the network stack will fail. This is because the subnet cannot be deleted until the instances are terminated or moved to another subnet. To avoid this issue, the network administrators should ensure that the instances are either terminated or moved before attempting to delete the subnet.

B. Restricting the launch of EC2 instances into VPCs requires resource level permissions in the IAM policy of the application group.

This means that the ability to launch EC2 instances in a particular VPC is controlled by the IAM policy of the application group. The policy should be configured to allow only the necessary permissions required by the application to launch instances in that VPC. This is an example of implementing the security principle of least privilege, which restricts access to only what is necessary to perform a task.

C. Nesting network stacks within application stacks simplifies management and debugging, but requires resource-level permissions in the network group's IAM policy.

Nesting network stacks within application stacks can help simplify management and debugging, but it also requires resource-level permissions in the network group's IAM policy. This is because the application stack needs to be able to access and manage resources in the network stack. By granting resource-level permissions, the application stack can manage the resources it needs without giving it access to resources it doesn't need.

D. The application stack cannot be deleted before all network stacks are deleted.

This means that the network stacks must be deleted before the application stack can be deleted. This is because the application stack may depend on resources in the network stacks, and deleting the network stacks first ensures that the dependencies are removed before the application stack is deleted.

E. Unless account level permissions are used on the CloudFormation: Delete Stack action, network administrators could tear down application stacks.

This means that network administrators could potentially delete application stacks unless account-level permissions are used to restrict access to the Delete Stack action in CloudFormation. To implement the security principle of separation of duties, network administrators should not have the ability to delete application stacks unless it is absolutely necessary. By restricting access to the Delete Stack action, the risk of accidental or intentional deletion of application stacks is reduced.

Overall, by adopting CloudFormation and implementing these security principles, the enterprise can automate administrative tasks while maintaining security and reducing the risk of human error.