(autoscaling): applyCloudFormationInit on each launchTemplateOverrides of mixedInstancesPolicy

[BDeus]

Describe the feature

In the Construct autoscaling when setting a CloudFormationInit, the UserData is apply on the LaunchTemplate attach to the ASG.

aws-cdk/packages/aws-cdk-lib/aws-autoscaling/lib/auto-scaling-group.ts

Lines 1528 to 1536 in e260d30

	public applyCloudFormationInit(init: ec2.CloudFormationInit, options: ApplyCloudFormationInitOptions = {}) {
	if (!this.autoScalingGroup.cfnOptions.creationPolicy?.resourceSignal) {
	throw new Error('When applying CloudFormationInit, you must also configure signals by supplying \'signals\' at instantiation time.');
	}
	init.attach(this.autoScalingGroup, {
	platform: this.osType,
	instanceRole: this.role,
	userData: this.userData,

In case of usage of a MixedInstancesPolicy with LaunchTemplateOverrides, the overrides do not inherit from the UserData of the CloudFormationInit

Use Case

In case on multiple LaunchTemplate (ARM and x86 as example) the second one does apply the CloudFormationInit?
I do not know how to add the UserData on LaunchTemplateOverrides.

Proposed Solution

add the ability to copy the UserData of the main LaunchTemplate to every LaunchTemplates overrides on a MixedInstancesPolicy

Other Information

If anyone as a workaround solution, i'll be grateful

Acknowledgements

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

CDK version used

2.93.0

Environment details (OS name and version, etc.)

linux

[indrora]

While I believe this is the case, what would this look like in CloudFormation? Could you build this in CloudFormation?

[github-actions]

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