fix(lambda): deployment failure when layers are added to container fu…

…nctions (#15037)

This change fixes #14143 by throwing an error during synthesis if layers are used in a container function.

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

packages/@aws-cdk/aws-lambda/lib/function.ts

@@ -685,6 +685,10 @@ export class Function extends FunctionBase {
     this.runtime = props.runtime;
 
     if (props.layers) {
+      if (props.runtime === Runtime.FROM_IMAGE) {
+        throw new Error('Layers are not supported for container image functions');
+      }
+
       this.addLayers(...props.layers);
     }
 

packages/@aws-cdk/aws-lambda/test/function.test.ts

@@ -2156,6 +2156,22 @@ describe('function', () => {
       });
     });
   });
+
+  test('error when layers set in a container function', () => {
+    const stack = new cdk.Stack();
+    const bucket = new s3.Bucket(stack, 'Bucket');
+    const code = new lambda.S3Code(bucket, 'ObjectKey');
+
+    const layer = new lambda.LayerVersion(stack, 'Layer', {
+      code,
+    });
+
+    expect(() => new lambda.DockerImageFunction(stack, 'MyLambda', {
+      code: lambda.DockerImageCode.fromImageAsset(path.join(__dirname, 'docker-lambda-handler')),
+      layers: [layer],
+    })).toThrow(/Layers are not supported for container image functions/);
+  });
+
 });
 
 function newTestLambda(scope: constructs.Construct) {