Create subnets with resource based hostnames

[rothgar]

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What is the outcome that you are trying to reach?

Subnets created with blueprints should use resource based names for instances. This will allow Kubernetes nodes to have names that reflect their names in ec2 instead of the private IPv4 addresses

More info here https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-instance-naming.html

k get no
NAME                                             STATUS     ROLES    AGE     VERSION
i-09e0ab41a603abb0d.us-east-2.compute.internal   NotReady   <none>   4s      v1.24.10-eks-48e63af
i-0b3c0d675c5010751.us-east-2.compute.internal   NotReady   <none>   4s      v1.24.10-eks-48e63af
ip-192-168-105-197.us-east-2.compute.internal    Ready      <none>   7d20h   v1.24.10-eks-48e63af
ip-192-168-163-0.us-east-2.compute.internal      Ready      <none>   7d20h   v1.24.10-eks-48e63af

Describe the solution you would like

Creating a subnet with blueprints has this option enabled or exposed for customers. Examples should be updated to use this setting.

Describe alternatives you have considered

Changing hostnames in userdata or after the node is provisioned is not as consistent as doing it at the subnet level.

Additional context

This is a fairly new feature via https://github.com/aws/containers-roadmap/issues/1723

[askulkarni2]

Hi @rothgar, for this, first the support needs to be implemented in the VPC module. They are tracking it here. I will leave this issue open and will update our examples when upstream feature is available.

[bryantbiggs]

this will be added in v4 here https://github.com/terraform-aws-modules/terraform-aws-vpc/pull/838

[bryantbiggs]

this is now supported in v4.0.0 of the VPC module

[bryantbiggs]

and this should now be available in EKS https://github.com/awsdocs/amazon-eks-user-guide/pull/722