feat(eks): trainium instance types (#29155)

@freschri – It's a little hard to find docs on this but I think this is what you're after?

Closes #29131.

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

packages/aws-cdk-lib/aws-eks/README.md

@@ -228,8 +228,8 @@ cluster.addNodegroupCapacity('custom-node-group', {
 });
 ```
 
-> **NOTE:** If you add instances with the inferentia (`inf1` or `inf2`) class the
-> [neuron plugin](https://awsdocs-neuron.readthedocs-hosted.com/en/latest/containers/dlc-then-eks-devflow.html)
+> **NOTE:** If you add instances with the inferentia class (`inf1` or `inf2`) or trainium class (`trn1` or `trn1n`) 
+> the [neuron plugin](https://awsdocs-neuron.readthedocs-hosted.com/en/latest/containers/dlc-then-eks-devflow.html)
 > will be automatically installed in the kubernetes cluster.
 
 #### Node Groups with IPv6 Support

packages/aws-cdk-lib/aws-eks/lib/cluster.ts

@@ -1800,7 +1800,8 @@ export class Cluster extends ClusterBase {
       spotInterruptHandler: options.spotInterruptHandler,
     });
 
-    if (nodeTypeForInstanceType(options.instanceType) === NodeType.INFERENTIA) {
+    if (nodeTypeForInstanceType(options.instanceType) === NodeType.INFERENTIA ||
+    nodeTypeForInstanceType(options.instanceType) === NodeType.TRAINIUM ) {
       this.addNeuronDevicePlugin();
     }
 
@@ -1817,11 +1818,13 @@ export class Cluster extends ClusterBase {
    * @param options options for creating a new nodegroup
    */
   public addNodegroupCapacity(id: string, options?: NodegroupOptions): Nodegroup {
-    const hasInferentiaInstanceType = [
+    const hasInferentiaOrTrainiumInstanceType = [
       options?.instanceType,
       ...options?.instanceTypes ?? [],
-    ].some(i => i && nodeTypeForInstanceType(i) === NodeType.INFERENTIA);
-    if (hasInferentiaInstanceType) {
+    ].some(i => i && (nodeTypeForInstanceType(i) === NodeType.INFERENTIA ||
+        nodeTypeForInstanceType(i) === NodeType.TRAINIUM));
+
+    if (hasInferentiaOrTrainiumInstanceType) {
       this.addNeuronDevicePlugin();
     }
     return new Nodegroup(this, `Nodegroup${id}`, {
@@ -2373,6 +2376,7 @@ export class EksOptimizedImage implements ec2.IMachineImage {
         'amazon-linux-2/' : 'amazon-linux-2-arm64/' : '')
       + (this.nodeType === NodeType.GPU ? 'amazon-linux-2-gpu/' : '')
       + (this.nodeType === NodeType.INFERENTIA ? 'amazon-linux-2-gpu/' : '')
+      + (this.nodeType === NodeType.TRAINIUM ? 'amazon-linux-2-gpu/' : '')
       + 'recommended/image_id';
   }
 
@@ -2410,6 +2414,11 @@ export enum NodeType {
    * Inferentia instances
    */
   INFERENTIA = 'INFERENTIA',
+
+  /**
+   * Trainium instances
+   */
+  TRAINIUM = 'TRAINIUM',
 }
 
 /**
@@ -2471,9 +2480,14 @@ export enum MachineImageType {
 }
 
 function nodeTypeForInstanceType(instanceType: ec2.InstanceType) {
-  return INSTANCE_TYPES.gpu.includes(instanceType.toString().substring(0, 2)) ? NodeType.GPU :
-    INSTANCE_TYPES.inferentia.includes(instanceType.toString().substring(0, 4)) ? NodeType.INFERENTIA :
-      NodeType.STANDARD;
+  if (INSTANCE_TYPES.gpu.includes(instanceType.toString().substring(0, 2))) {
+    return NodeType.GPU;
+  } else if (INSTANCE_TYPES.inferentia.includes(instanceType.toString().substring(0, 4))) {
+    return NodeType.INFERENTIA;
+  } else if (INSTANCE_TYPES.trainium.includes(instanceType.toString().substring(0, 4))) {
+    return NodeType.TRAINIUM;
+  }
+  return NodeType.STANDARD;
 }
 
 function cpuArchForInstanceType(instanceType: ec2.InstanceType) {

packages/aws-cdk-lib/aws-eks/lib/instance-types.ts

@@ -4,4 +4,5 @@ export const INSTANCE_TYPES = {
   graviton: ['a1'],
   graviton2: ['c6g', 'm6g', 'r6g', 't4g'],
   graviton3: ['c7g'],
+  trainium: ['trn1', 'trn1n'],
 };

packages/aws-cdk-lib/aws-eks/test/cluster.test.ts

@@ -2209,6 +2209,42 @@ describe('cluster', () => {
         Manifest: JSON.stringify([sanitized]),
       });
     });
+    test('trn1 instances are supported', () => {
+      // GIVEN
+      const { stack } = testFixtureNoVpc();
+      const cluster = new eks.Cluster(stack, 'Cluster', { defaultCapacity: 0, version: CLUSTER_VERSION, prune: false });
+
+      // WHEN
+      cluster.addAutoScalingGroupCapacity('TrainiumInstances', {
+        instanceType: new ec2.InstanceType('trn1.2xlarge'),
+        minCapacity: 1,
+      });
+      const fileContents = fs.readFileSync(path.join(__dirname, '..', 'lib', 'addons', 'neuron-device-plugin.yaml'), 'utf8');
+      const sanitized = YAML.parse(fileContents);
+
+      // THEN
+      Template.fromStack(stack).hasResourceProperties(eks.KubernetesManifest.RESOURCE_TYPE, {
+        Manifest: JSON.stringify([sanitized]),
+      });
+    });
+    test('trn1n instances are supported', () => {
+      // GIVEN
+      const { stack } = testFixtureNoVpc();
+      const cluster = new eks.Cluster(stack, 'Cluster', { defaultCapacity: 0, version: CLUSTER_VERSION, prune: false });
+
+      // WHEN
+      cluster.addAutoScalingGroupCapacity('TrainiumInstances', {
+        instanceType: new ec2.InstanceType('trn1n.2xlarge'),
+        minCapacity: 1,
+      });
+      const fileContents = fs.readFileSync(path.join(__dirname, '..', 'lib', 'addons', 'neuron-device-plugin.yaml'), 'utf8');
+      const sanitized = YAML.parse(fileContents);
+
+      // THEN
+      Template.fromStack(stack).hasResourceProperties(eks.KubernetesManifest.RESOURCE_TYPE, {
+        Manifest: JSON.stringify([sanitized]),
+      });
+    });
 
     test('inf1 instances are supported in addNodegroupCapacity', () => {
       // GIVEN