CloudFormation

Question 1

What is CloudFormation?

Answer 1

Manage, configure and provision AWS infrastructure as code

Question 2

What formats can a CloudFormation document be in

Answer 2

YAML

JSON

Question 3

Where is CloudFormation template uploaded

Answer 3

S3

Question 4

Required part of CloudFormation Template

Answer 4

Resource section

resources you want AWS to create for you

Question 5

What is the Transform section of CloudFormation code used for

Answer 5

reference additional code stored in S3 allowing for code reuse

or

SAM

Question 6

Sections of CloudFormation Template

Answer 6

Parameters
Conditions
Resources
mappings (custom mapping like Regio:AMI)
Transform

Question 7

What happens if there are problems with the deploy of a CloudFormation template?

Answer 7

Rollsback automatically to previous stack

Question 8

If want CloudFormation template to regularly update to map latest AMI ID how can you do that efficiently?

Answer 8

Use CloudFormation with Systems Manager Parameter Store to retrieve latest AMI ID for template. Put these in Parameter section of template. Whenever you update EC2 instances call update-stack API in CloudFormation in CloudFormation Template

Question 9

CloudFormation Nested Stack

Answer 9

allow re-use of CloudFormation code for common use cases

Question 10

How to create a nested stack in CloudFormation

Answer 10

Type: AWS:CloudFormation:Stack
TemplateURL: (url to template)

Question 11

What is cfn-init used for?

Answer 11

Install packages and start/stop services on EC2 instances,

Install packages, start/stop services or create files

Question 12

How to create, update, and delete stacks across multiple aws accounts and regions w/ one operation?

Answer 12

CloudFormation StackSets