Cloudformation

Question 1

What are the 5 parameter types for Cloudformation?

Answer 1

• String
• Number
• CommaDelimitedList
• List
• AWS Parameter

Question 2

How do you reference a parameter in the template?

Answer 2

use the !Ref function

Question 3

What are the 6 Psuedo Parameters provided by AWS?

Answer 3

• AccountId
• NotificationARNs
• NoValue
• Region
• StackName
• StackId

Question 4

What should I do if an AWS resource is not supported in CLoudformation?

Answer 4

Use Lambda Custom Resources

Question 5

How do you reference a value from another template?

Answer 5

Use the !ImportValue function

Question 6

How do you make a value useable outside the template?

Answer 6

Export it in the Output section

Question 7

What are the 7 Intrinsic functions available?

Answer 7

• Ref
• GetAtt
• FindInMap
• ImportValue
• Join
• Sub
• Conditions

Question 8

What is UserData?

Answer 8

It is a bash script you can include in the template to run on instance boot.

Question 9

What is cfn:init?

Answer 9

It is a helper script that reads metadata and is more readable/maintainable than UserData

Question 10

How do you use UserData and cfn:init together?

Answer 10

• UserData should update aws-cfn-bootstrap and start cfn init. cfn:init should install everything

Question 11

How do you ensure the cfn:init has run?

Answer 11

Use cfn-signal