CloudFormation (CFN) Demo ROLL_BACK Error

[AXRoux]

ERROR:

Parameter validation failed: parameter value for parameter name KeyName does not exist. Rollback requested by user.

occurs when uploading the ec2instance.yaml file

SOLUTION

Remove lines 5, 6 and 7 from the .yaml file

KeyName:
Type: AWS::EC2::KeyPair::KeyName
Description: "Name of an existing SSH Keypair to access the instance"

[acantril]

Hi
You should have created a keyname A4L earlier in the course.
this is what this template should be using.

[acantril]

And when you say 'uploading'? you should be using 1-click deployments (attached to the lessons) not "uploading" a template.

[AXRoux]

Correct, I was confused because in the video there isn't a Key parameter so I just browsed over that part. Thanks for clearing up the confusion.

[acantril]

Because you are using the upload version - the demo doesn't use that.
You generally should be using the 1-click deployment links under the video in the lessons, not the versions (if any) on the github repo.