add nitro requirement for Karpenter pools

Author: demonCoder95

cluster/config-defaults.yaml

@@ -44,6 +44,9 @@ karpenter_max_pods_per_node: "32"
 # Our AMI configured RAID0 at boot.
 karpenter_instance_storage_raid0: "true"
 
+# Require support for the Nitro hypervisor for Karpenter NodePools.
+karpenter_nitro_support_required: "true"
+
 # ALB config created by kube-aws-ingress-controller
 kube_aws_ingress_controller_ssl_policy: "ELBSecurityPolicy-TLS-1-2-2017-01"
 kube_aws_ingress_controller_idle_timeout: "1m"

cluster/node-pools/worker-karpenter/provisioners.yaml

@@ -150,6 +150,14 @@ spec:
           values:
             - nitro
 #{{ end }}
+#{{ if eq .Cluster.ConfigItems.karpenter_nitro_support_required "true" }}
+#{{ if and (eq .Cluster.Provider "zalando-aws") (eq .NodePool.KarpenterInstanceTypeStrategy "not-specified") }}
+        - key: karpenter.k8s.aws/instance-hypervisor
+          operator: in
+          values:
+            - nitro
+#{{ end }}
+#{{ end }}
 #{{ if $taints }}
 #  {{ range $taints }}
 #    {{ $taint := . }}