Allow empty AMI ID, Instance type in launch template of AWSManagedMachinePool

[Julian-Chu]

/kind feature

We try to adopt CAPI+CAPA for our cluster to have same configuration, but find something not supported in the launch template.

Describe the solution you'd like

In the AWSManagedMachinePool spec

• when AMI type is defined(except CUSTOM type), the controller should create launch template without ami id. This allows EKS to use managed AMI with launch template
• when Instance type(s) is defined, the controller should create launch template without instance type(s).

Customizing managed nodes with launch templates

this is a launch template in our running EKS node group, we use to customize the security group and storage

Anything else you would like to add:

• if fine, we're happy to submit PR for implementation.
• do we also have to review the proposal doc?

Environment:

• Cluster-api-provider-aws version:
• Kubernetes version: (use kubectl version):
• OS (e.g. from /etc/os-release):

[richardcase]

/triage accepted
/priority important-soon

[richardcase]

/milestone v2.3.0

[AndiDog]

/milestone v2.4.0

to match the delayed PR #4388

[k8s-ci-robot]

@AndiDog: You must be a member of the kubernetes-sigs/cluster-api-provider-aws-maintainers GitHub team to set the milestone. If you believe you should be able to issue the /milestone command, please contact your Cluster API Provider AWS Maintainers and have them propose you as an additional delegate for this responsibility.

In response to this:

/milestone v2.4.0

to match the delayed PR #4388

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[richardcase]

/milestone v2.4.0

[k8s-triage-robot]

This issue is labeled with priority/important-soon but has not been updated in over 90 days, and should be re-triaged.
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/remove-triage accepted

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/lifecycle stale

[k8s-triage-robot]

The Kubernetes project currently lacks enough active contributors to adequately respond to all issues.

This bot triages un-triaged issues according to the following rules:

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/lifecycle rotten