[aws-eks] Managed NodeGroup diskType support

[bramk]

Describe the feature

Allow specifying volume type for root volumes of Managed NodeGroup EC2 instances.

Use Case

We want to move away from gp2 and use gp3 root devices when using EKS Managed NodeGroups.

Proposed Solution

Add a ‎EbsDeviceVolumeType? parameter "diskType" in managed-nodegroup that can override the current default gp2.

Other Information

There already is "diskSize". Also closely related to #9006.

Acknowledgements

• I may be able to implement this feature request
• This feature might incur a breaking change

CDK version used

2.170.0

Environment details (OS name and version, etc.)

EKS 1.30 with standard AMIs

[khushail]

Hi @bramk , thanks for requesting this. Currently, this diskType is not supported by Cloudformation as can be seen here -https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-eks-nodegroup.html#aws-resource-eks-nodegroup-properties.

but I also see this suggestion of providing support in case of EBS Encryption - #9006 (comment) and using the EC2.LaunchTemplate for the same(same scenario holds true for NodeGroup DiskType AFAIU). So I think you might have to do the same as a workaround by incorporating the change in line.

So in this regard, I would mark this issue for input by the Core team for an approval on the process if this is something on their radar for future work or if they would like to share insights on the suggested mode of action.Hope that helps!

Thanks