Support for autoscaling group AMI override

[GaruGaru]

Is your request related to a new offering from AWS?

https://docs.aws.amazon.com/autoscaling/ec2/userguide/asg-launch-template-overrides.html

Is your request related to a problem? Please describe.

Since aws has introduced eks support for arm instances the module should also support the creation of asg with mixed instance type (arm64, x64).

The suggested way to implement this feature is to create multiple launchtemplates and overriding the default launch template with a specific one related to the instance type.

Describe the solution you'd like.

The module should provide a way to override the launchtemplate inside the mixed_instances_policy of aws_autoscaling_group as defined in the aws examples.

At the moment the feature is only supported for the instance_type by providing the override_instance_types variable:

terraform-aws-eks/workers_launch_template.tf

Lines 159 to 169 in 9022013

	dynamic "override" {
	for_each = lookup(
	var.worker_groups_launch_template[count.index],
	"override_instance_types",
	local.workers_group_defaults["override_instance_types"]
	)
	content {
	instance_type = override.value
	}
	}

The module should also define launch_template_specification if needed

      override {
        instance_type = override.value
        launch_template_specification {
          launch_template_id = <instance_launch_template_id>
        } 
      }

We can introduce a new parameter such as override_instance_type_launch_template that allow users to provide instance_type to launch_template_id association.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[antonbabenko]

This issue has been resolved in version 18.0.0 🎉

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