About aws china ebs encryption

if i use “arn:aws:kms:us-east-1:accountID:key/xxx-xxx-xxx” to encrypt AMI,packer validate command will returen sucess,but use “arn:aws-cn:kms:cn-north-1:accountID:key/xxx-xxx-xxx” it will be failed

Hi,
as per my understanding this is not support. AWS China isn’t supported by AWS KMS multi-region keys.

https://docs.aws.amazon.com/kms/latest/developerguide/multi-region-keys-overview.html