(aws_eks): (COMPUTE7_GRAVITON3 picks wrong AMI)

[dborysenko]

Describe the bug

Below code picks X86_64 AMI for ARM AutoScaling group.

cluster.add_auto_scaling_group_capacity(
        "dmzASG",
        instance_type=ec2.InstanceType.of(ec2.InstanceClass.COMPUTE7_GRAVITON3,
                                          ec2.InstanceSize.XLARGE8),
        block_devices=[
            autoscaling.BlockDevice(device_name='/dev/xvda',
                                    volume=autoscaling.BlockDeviceVolume.ebs(
                                        50, encrypted=True))
        ],
        min_capacity=1,
        max_capacity=100,
        vpc_subnets=ec2.SubnetSelection(subnets=dmz_subnet_list)
)

Expected Behavior

Expect 1 EC2 instance of type "c7g.8xlarge" to be created.

Current Behavior

0 instances created. AutoScailing group Activity tab reports below error:
Launching a new EC2 instance. Status Reason: The architecture 'arm64' of the specified instance type does not match the architecture 'x86_64' of the specified AMI. Specify an instance type and an AMI that have matching architectures, and try again. You can use 'describe-instance-types' or 'describe-images' to discover the architecture of the instance type or AMI. Launching EC2 instance failed.

Reproduction Steps

try to add asg capacity to eks cluster:

cluster.add_auto_scaling_group_capacity(
        "dmzASG",
        instance_type=ec2.InstanceType.of(ec2.InstanceClass.COMPUTE7_GRAVITON3,
                                          ec2.InstanceSize.XLARGE8),
        block_devices=[
            autoscaling.BlockDevice(device_name='/dev/xvda',
                                    volume=autoscaling.BlockDeviceVolume.ebs(
                                        50, encrypted=True))
        ],
        min_capacity=1,
        max_capacity=100,
        vpc_subnets=ec2.SubnetSelection(subnets=dmz_subnet_list)
)

Possible Solution

Switching InstanceClass to COMPUTE6_GRAVITON2 "resolves" the issue:

cluster.add_auto_scaling_group_capacity(
        "dmzASG",
        instance_type=ec2.InstanceType.of(ec2.InstanceClass. COMPUTE6_GRAVITON2,
                                          ec2.InstanceSize.XLARGE8),
        block_devices=[
            autoscaling.BlockDevice(device_name='/dev/xvda',
                                    volume=autoscaling.BlockDeviceVolume.ebs(
                                        50, encrypted=True))
        ],
        min_capacity=1,
        max_capacity=100,
        vpc_subnets=ec2.SubnetSelection(subnets=dmz_subnet_list)
)

Additional Information/Context

No response

CDK CLI Version

2.28.0 (build ba233f0)

Framework Version

No response

Node.js Version

v16.15.0

OS

MacOS 12.4

Language

Python

Language Version

Python 3.9.12

Other information

No response

[gergnz]

As soon as I can get my integration tests working this should be fixed in #20543

[peterwoodworth]

Thanks for getting to this @gergnz!

[dborysenko]

Issue is resolved in cdk 2.29.0
Thank you. Closing.

[github-actions]

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