What is the primary benefit of using Systems Manager Session Manager over SSH/RDP?
The primary benefit of using AWS Systems Manager Session Manager over traditional SSH or RDP is enhanced security through the elimination of inbound open ports and static credentials.
What is a Change Set in CloudFormation?
In AWS CloudFormation, a Change Set is a "preview" of the actions CloudFormation will take before you actually apply an update to your stack.
What is a CloudFormation stack?
A CloudFormation stack is a collection of AWS resources that you manage as a single unit.
What is required on an EC2 instance to be managed via Systems Manager?
1. SSM Agent Installed and Running
2. IAM Role (Instance Profile)
3. Network Connectivity
What is the default behavior of CloudFormation when a resource creation fails during stack creation?
By default, when a resource creation fails during the creation of a new stack, AWS CloudFormation triggers an automatic rollback.
This behavior is designed to ensure that you don't leave "dangling" resources or a half-finished environment, which could lead to security vulnerabilities or unexpected costs.