fix: adds ami details for nodeadm configs (#1334)

**What problem does this PR solve?**:
adds details required for al 2023

**Which issue(s) this PR fixes**:
stacked on #1332

**How Has This Been Tested?**:
<!--
Please describe the tests that you ran to verify your changes.
Provide output from the tests and any manual steps needed to replicate
the tests.
-->

**Special notes for your reviewer**:
<!--
Use this to provide any additional information to the reviewers.
This may include:
- Best way to review the PR.
- Where the author wants the most review attention on.
- etc.
-->

Author: faiq

charts/cluster-api-runtime-extensions-nutanix/defaultclusterclasses/eks-cluster-class.yaml

@@ -31,8 +31,8 @@ spec:
         bootstrap:
           ref:
             apiVersion: bootstrap.cluster.x-k8s.io/v1beta2
-            kind: EKSConfigTemplate
-            name: quick-start-worker-configtemplate
+            kind: NodeadmConfigTemplate
+            name: eks-quick-start-worker-configtemplate
         infrastructure:
           ref:
             apiVersion: infrastructure.cluster.x-k8s.io/v1beta2
@@ -73,6 +73,11 @@ metadata:
 spec:
   template:
     spec:
+      ami:
+        eksLookupType: AmazonLinux2023
+      instanceMetadataOptions:
+        httpPutResponseHopLimit: 2
+        httpTokens: required
       instanceType: PLACEHOLDER
       sshKeyName: ""
 ---

hack/examples/bases/eks/clusterclass/clusterclass.yaml

@@ -24,7 +24,7 @@ spec:
             ref:
               name: "quick-start-worker-configtemplate"
               apiVersion: bootstrap.cluster.x-k8s.io/v1beta2
-              kind: EKSConfigTemplate
+              kind: NodeadmConfigTemplate
           infrastructure:
             ref:
               name: "quick-start-worker-machinetemplate"
@@ -58,7 +58,12 @@ metadata:
   name: "quick-start-worker-machinetemplate"
 spec:
   template:
-    spec: {}
+    spec:
+      ami:
+        eksLookupType: AmazonLinux2023
+      instanceMetadataOptions:
+        httpTokens: required
+        httpPutResponseHopLimit: 2
 ---
 apiVersion: bootstrap.cluster.x-k8s.io/v1beta2
 kind: NodeadmConfigTemplate

hack/examples/overlays/clusterclasses/eks/kustomizeconfig.yaml

@@ -16,7 +16,7 @@ nameReference:
     fieldSpecs:
     - kind: ClusterClass
       path: spec/controlPlane/ref/name
-  - kind: EKSConfigTemplate
+  - kind: NodeadmConfigTemplate
     fieldSpecs:
     - kind: ClusterClass
       path: spec/workers/machineDeployments/template/bootstrap/ref/name

pkg/handlers/generic/mutation/taints/inject_worker.go

@@ -12,7 +12,7 @@ import (
 	v1 "k8s.io/api/core/v1"
 	apiextensionsv1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1"
 	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
-	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/utils/ptr"
 	bootstrapv1 "sigs.k8s.io/cluster-api/bootstrap/kubeadm/api/v1beta1"
 	runtimehooksv1 "sigs.k8s.io/cluster-api/exp/runtime/hooks/api/v1alpha1"
 	ctrl "sigs.k8s.io/controller-runtime"
@@ -115,19 +115,10 @@ func (h *taintsWorkerPatchHandler) Mutate(
 				"patchedObjectKind", obj.GetObjectKind().GroupVersionKind().String(),
 				"patchedObjectName", ctrlclient.ObjectKeyFromObject(obj),
 			).Info("adding taints to worker NodeadmConfig template")
-			kubeletOptions := obj.Spec.Template.Spec.Kubelet
-			var runtimeConfigFromNodeadm *runtime.RawExtension
-			var flags []string
 			newTaints := toEKSConfigTaints(taintsVar)
-			if kubeletOptions != nil {
-				runtimeConfigFromNodeadm = kubeletOptions.Config
-				flags = kubeletOptions.Flags
-			}
-			flags = append(flags, fmt.Sprintf("--register-with-taints=%s", newTaints))
-			obj.Spec.Template.Spec.Kubelet = &eksbootstrapv1.KubeletOptions{
-				Flags:  flags,
-				Config: runtimeConfigFromNodeadm,
-			}
+			kubeletOptions := ptr.Deref(obj.Spec.Template.Spec.Kubelet, eksbootstrapv1.KubeletOptions{})
+			kubeletOptions.Flags = append(kubeletOptions.Flags, fmt.Sprintf("--register-with-taints=%s", newTaints))
+			obj.Spec.Template.Spec.Kubelet = &kubeletOptions
 			return nil
 		}); err != nil {
 		return err