codedeploy blue-green deployment cannot be stopped

Question

Neither the console Stop deployment and Stop and roll back deployment nor the aws cli can stop the blue-green deployment. There are always new instances in the Terminated state in the Instances list.

Deployment
It has been going on for 5 hours, and stopping Pipelines has no effect.

![Enter image description here](/media/postImages/original/IMZrO9wrGIT8OF4FWRxX2Nkg)

Instance state

![Enter image description here](/media/postImages/original/IMHlazpaHqSd2afdDx7bU5hA)

launch time
![Enter image description here](/media/postImages/original/IM8JJiInVeT8m5znoYnyrGzA)

Why do I keep starting EC2 instances after running blue-green deployment, but all instances cannot start running, and the instance status is: terminated

Launching a new EC2 instance: i-0022e48aaf0890ee0. Status Reason: Instance became unhealthy while waiting for instance to be in InService state. Termination Reason: Client.InternalError: Client error on launch

Accepted Answer

Hello there,

To best troubleshoot this issue, we require information that is non-public information. Please open a support case with AWS Support using the following [link](https://console.aws.amazon.com/support/home#/case/create)

Answer

Client.Internalerror when launching from an AutoScaling Group is almost always because of a CMK (Customer managed KMS Key) being used for the snapshot, AMI, and/or volume.  AutoScaling needs to be given access to the key: 
https://docs.aws.amazon.com/autoscaling/ec2/userguide/key-policy-requirements-EBS-encryption.html

https://docs.aws.amazon.com/autoscaling/ec2/userguide/ts-as-instancelaunchfailure.html

codedeploy blue-green deployment cannot be stopped

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