@@ -121,9 +121,22 @@ func vpcCNIAddonSpecified(cfg *ClusterConfig) bool {
121121}
122122
123123// SetNodeGroupDefaults will set defaults for a given nodegroup
124- func SetNodeGroupDefaults (ng * NodeGroup , meta * ClusterMeta , controlPlaneOnOutposts bool ) {
124+ func SetNodeGroupDefaults (ng * NodeGroup , meta * ClusterMeta , controlPlaneOnOutposts bool ) error {
125125 setNodeGroupBaseDefaults (ng .NodeGroupBase , meta )
126126
127+ // Set default AMI family depending on Kubernetes version
128+ isAL2EOLVersion , _ := utils .IsMinVersion (AmazonLinux2EOLVersion , meta .Version )
129+ if isAL2EOLVersion {
130+ // For newer Kubernetes versions, default to AL2023
131+ if ng .AMIFamily == "" {
132+ ng .AMIFamily = NodeImageFamilyAmazonLinux2023
133+ }
134+ // Since AL2 isn't supported, throw an error if the user explicitly requested AL2
135+ if ng .AMIFamily == NodeImageFamilyAmazonLinux2 {
136+ return fmt .Errorf ("AmazonLinux2 is not supported for Kubernetes version %s" , meta .Version )
137+ }
138+ }
139+ // Default to AL2 for Kubernetes versions prior to AmazonLinux2EOLVersion
127140 if ng .AMIFamily == "" {
128141 ng .AMIFamily = DefaultNodeImageFamily
129142 }
@@ -139,15 +152,27 @@ func SetNodeGroupDefaults(ng *NodeGroup, meta *ClusterMeta, controlPlaneOnOutpos
139152 }
140153
141154 setContainerRuntimeDefault (ng , meta .Version )
155+ return nil
142156}
143157
144158// SetManagedNodeGroupDefaults sets default values for a ManagedNodeGroup
145- func SetManagedNodeGroupDefaults (ng * ManagedNodeGroup , meta * ClusterMeta , controlPlaneOnOutposts bool ) {
159+ func SetManagedNodeGroupDefaults (ng * ManagedNodeGroup , meta * ClusterMeta , controlPlaneOnOutposts bool ) error {
146160 setNodeGroupBaseDefaults (ng .NodeGroupBase , meta )
147161
148162 // When using custom AMIs, we want the user to explicitly specify AMI family.
149163 // Thus, we only set up default AMI family when no custom AMI is being used.
150- if ng .AMIFamily == "" && ng .AMI == "" {
164+ isAL2EOLVersion , _ := utils .IsMinVersion (AmazonLinux2EOLVersion , meta .Version )
165+ if ng .AMI == "" && isAL2EOLVersion {
166+ // Set default AMI family depending on Kubernetes version
167+ // For newer Kubernetes versions, default to AL2023
168+ if ng .AMIFamily == "" {
169+ ng .AMIFamily = NodeImageFamilyAmazonLinux2023
170+ }
171+ // Since AL2 isn't supported for this K8s version, throw an error if the user explicitly requested AL2
172+ if ng .AMIFamily == NodeImageFamilyAmazonLinux2 {
173+ return fmt .Errorf ("AmazonLinux2 is not supported for Kubernetes version %s" , meta .Version )
174+ }
175+ } else if ng .AMI == "" && ng .AMIFamily == "" {
151176 // AL2023 is the default ami type on EKS managed nodegroups after 1.30.
152177 if isMinVer , _ := utils .IsMinVersion (Version1_30 , meta .Version ); isMinVer {
153178 ng .AMIFamily = NodeImageFamilyAmazonLinux2023
@@ -164,6 +189,8 @@ func SetManagedNodeGroupDefaults(ng *ManagedNodeGroup, meta *ClusterMeta, contro
164189
165190 setVolumeDefaults (ng .NodeGroupBase , controlPlaneOnOutposts , ng .LaunchTemplate )
166191 setDefaultsForAdditionalVolumes (ng .NodeGroupBase , controlPlaneOnOutposts )
192+
193+ return nil
167194}
168195
169196func setNodeGroupBaseDefaults (ng * NodeGroupBase , meta * ClusterMeta ) {
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