feat(python)!: add v2 layer and drop python 3.6 support

.projenrc.js

@@ -4,7 +4,7 @@ const project = new awscdk.AwsCdkConstructLibrary({
   authorUrl: 'https://aws.amazon.com',
   authorOrganization: true,
   keywords: ['aws', 'cdk', 'powertools', 'python', 'layer', 'lambda', 'devax', 'typescript', 'nodejs'],
-  cdkVersion: '2.24.1',
+  cdkVersion: '2.44.0',
   defaultReleaseBranch: 'main',
   majorVersion: 2,
   name: 'cdk-aws-lambda-powertools-layer',

layer/Python/Dockerfile

@@ -1,19 +1,26 @@
 FROM public.ecr.aws/lambda/python:3.8
 
-
-
 ARG PACKAGE_SUFFIX=''
 
 USER root
 WORKDIR /tmp
 
-
-# PACKAGE_SUFFIX = '[pydantic]==1.23.0'
-# PACKAGE_SUFFIX = '[pydantic]'
-# PACKAGE_SUFFIX = '=='1.23.0'
+# PACKAGE_SUFFIX = '[all]==2.0.0'
+# PACKAGE_SUFFIX = '[all]'
+# PACKAGE_SUFFIX = '=='2.0.0'
 # PACKAGE_SUFFIX = ''
 
+RUN yum update -y && yum install -y zip unzip wget tar gzip binutils
 
-RUN yum update -y && yum install -y zip unzip wget tar gzip
+RUN pip install -t /asset/python aws-lambda-powertools$PACKAGE_SUFFIX
 
-RUN pip install -t /asset/python aws-lambda-powertools$PACKAGE_SUFFIX
+# Removing nonessential files
+RUN cd /asset && \
+  # remove boto3 and botocore (already available in Lambda Runtime)
+  rm -rf python/boto* && \
+  # remove debugging symbols
+  find python -name '*.so' -type f -exec strip "{}" \; && \
+  # remove tests
+  find python -wholename "*/tests/*" -type f -delete && \
+  # remove python bytecode
+  find python -regex '^.*\(__pycache__\|\.py[co]\)$' -delete

src/lambda-powertools-layer.ts

@@ -1,5 +1,6 @@
 import * as path from 'path';
 import { aws_lambda as lambda } from 'aws-cdk-lib';
+import { Architecture } from 'aws-cdk-lib/aws-lambda';
 import { Construct } from 'constructs';
 
 /**
@@ -10,8 +11,9 @@ export interface PowertoolsLayerProps {
    * The powertools package version from pypi repository.
    */
   readonly version?: string;
+
   /**
-   * A flag for the pydantic extras dependency, used for parsing.
+   * A flag for the extras dependencies (pydantic, aws-xray-sdk, etc.)
    * This will increase the size of the layer significantly. If you don't use parsing, ignore it.
    */
   readonly includeExtras?: boolean;
@@ -25,6 +27,11 @@ export interface PowertoolsLayerProps {
    * the runtime of the layer
    */
   readonly runtimeFamily?: lambda.RuntimeFamily;
+
+  /**
+   * The compatible architectures for the layer
+   */
+  readonly compatibleArchitectures?: lambda.Architecture[];
 }
 
 /**
@@ -36,7 +43,7 @@ export class LambdaPowertoolsLayer extends lambda.LayerVersion {
    * There are multiple combinations between version and extras package that results in different suffix for the installation.
    * With and without version, with and without extras flag.
    * We construct one suffix here because it is easier to do in code than inside the Dockerfile with bash commands.
-   * For example, if we set extras=true and version=1.22.0 we get '[pydantic]==1.22.0'.
+   * For example, if we set `includeExtras=true` and `version=1.22.0` we get '[all]==1.22.0'.
    *
    */
   static constructBuildArgs(
@@ -48,7 +55,7 @@ export class LambdaPowertoolsLayer extends lambda.LayerVersion {
     switch (runtimeFamily) {
       case lambda.RuntimeFamily.PYTHON:
         if (includeExtras) {
-          suffix = '[pydantic]';
+          suffix = '[all]';
         }
         if (version) {
           suffix = `${suffix}==${version}`;
@@ -69,6 +76,8 @@ export class LambdaPowertoolsLayer extends lambda.LayerVersion {
     const runtimeFamily = props?.runtimeFamily ?? lambda.RuntimeFamily.PYTHON;
     const languageName = getLanguageNameFromRuntimeFamily(runtimeFamily);
     const dockerFilePath = path.join(__dirname, `../layer/${languageName}`);
+    const compatibleArchitectures = props?.compatibleArchitectures ?? [lambda.Architecture.X86_64];
+
     console.log(`path ${dockerFilePath}`);
     super(scope, id, {
       code: lambda.Code.fromDockerBuild(dockerFilePath, {
@@ -79,12 +88,15 @@ export class LambdaPowertoolsLayer extends lambda.LayerVersion {
             props?.version,
           ),
         },
+        // supports cross-platform docker build
+        platform: getDockerPlatformNameFromArchitectures(compatibleArchitectures),
       }),
       layerVersionName: props?.layerVersionName ? props?.layerVersionName : undefined,
       license: 'MIT-0',
       compatibleRuntimes: getRuntimesFromRuntimeFamily(runtimeFamily),
-      description: `Lambda Powertools for ${languageName}${
-        props?.includeExtras ? ' with Pydantic' : ''
+      compatibleArchitectures,
+      description: `Lambda Powertools for ${languageName} [${compatibleArchitectures.map(x => x.name).join(', ')}]${
+        props?.includeExtras ? ' with extra dependencies' : ''
       } ${props?.version ? `version ${props?.version}` : 'latest version'}`.trim(),
     });
   }
@@ -94,7 +106,6 @@ function getRuntimesFromRuntimeFamily(runtimeFamily: lambda.RuntimeFamily): lamb
   switch (runtimeFamily) {
     case lambda.RuntimeFamily.PYTHON:
       return [
-        lambda.Runtime.PYTHON_3_6,
         lambda.Runtime.PYTHON_3_7,
         lambda.Runtime.PYTHON_3_8,
         lambda.Runtime.PYTHON_3_9,
@@ -120,3 +131,16 @@ function getLanguageNameFromRuntimeFamily(runtimeFamily: lambda.RuntimeFamily):
       return 'Unknown';
   }
 }
+
+// Docker expects a single string for the --platform option.
+// getDockerPlatformNameFromArchitectures converts the Architecture enum to a string.
+function getDockerPlatformNameFromArchitectures(architectures: lambda.Architecture[]): string {
+  if (architectures.length == 1) {
+    return architectures[0].dockerPlatform;
+  } else {
+    // if we have multiple architectures, we default to x86_64, hoping for the
+    // layer not to have any architecture specific code or at least contain
+    // binary code for all architectures
+    return Architecture.X86_64.dockerPlatform;
+  }
+}

test/lambda-powertools-python-layer.test.ts

@@ -1,6 +1,6 @@
 import { Stack } from 'aws-cdk-lib';
 import { Template } from 'aws-cdk-lib/assertions';
-import { RuntimeFamily } from 'aws-cdk-lib/aws-lambda';
+import { Architecture, RuntimeFamily } from 'aws-cdk-lib/aws-lambda';
 import { LambdaPowertoolsLayer } from '../src';
 
 
@@ -10,7 +10,7 @@ describe('with no configuration the construct', () => {
   const template = Template.fromStack(stack);
   test('synthesizes successfully', () => {
     template.hasResourceProperties('AWS::Lambda::LayerVersion', {
-      Description: 'Lambda Powertools for Python latest version',
+      Description: 'Lambda Powertools for Python [x86_64] latest version',
     });
   });
 
@@ -23,7 +23,6 @@ describe('with no configuration the construct', () => {
   test('matches the python 3.x runtimes', () => {
     template.hasResourceProperties('AWS::Lambda::LayerVersion', {
       CompatibleRuntimes: [
-        'python3.6',
         'python3.7',
         'python3.8',
         'python3.9',
@@ -32,6 +31,21 @@ describe('with no configuration the construct', () => {
   });
 });
 
+describe('with arm64 architecture', () => {
+  const stack = new Stack();
+  new LambdaPowertoolsLayer(stack, 'PowertoolsLayer', {
+    runtimeFamily: RuntimeFamily.PYTHON,
+    compatibleArchitectures: [Architecture.ARM_64],
+  });
+  const template = Template.fromStack(stack);
+  test('synthesizes successfully', () => {
+    template.hasResourceProperties('AWS::Lambda::LayerVersion', {
+      Description: 'Lambda Powertools for Python [arm64] latest version',
+      CompatibleArchitectures: ['arm64'],
+    });
+  });
+});
+
 describe('for layerVersionName configuraiton the construct', () => {
   test('synthisizes to a layer with provided name', () => {
     const stack = new Stack();
@@ -54,7 +68,7 @@ describe('with version configuration the construct', () => {
 
 
     Template.fromStack(stack).hasResourceProperties('AWS::Lambda::LayerVersion', {
-      Description: 'Lambda Powertools for Python version 1.21.0',
+      Description: 'Lambda Powertools for Python [x86_64] version 1.21.0',
     });
   });
 
@@ -73,34 +87,34 @@ describe('with version configuration the construct', () => {
     });
 
     Template.fromStack(stack).hasResourceProperties('AWS::Lambda::LayerVersion', {
-      Description: 'Lambda Powertools for Python with Pydantic version 1.22.0',
+      Description: 'Lambda Powertools for Python [x86_64] with extra dependencies version 1.22.0',
     });
 
   });
 
-  test('synthesizes with pyndatic and latest version', () => {
+  test('synthesizes with extras and latest version', () => {
     const stack = new Stack();
     new LambdaPowertoolsLayer(stack, 'LayerExtrasNoVersion', {
       includeExtras: true,
     });
 
     Template.fromStack(stack).hasResourceProperties('AWS::Lambda::LayerVersion', {
-      Description: 'Lambda Powertools for Python with Pydantic latest version',
+      Description: 'Lambda Powertools for Python [x86_64] with extra dependencies latest version',
     });
   });
 });
 
 describe('construct build args for Dockerfile', () => {
-  test('returns pydantic and version', () => {
+  test('returns extras and version', () => {
     const args = LambdaPowertoolsLayer.constructBuildArgs(RuntimeFamily.PYTHON, true, '1.21.0');
 
-    expect(args).toEqual('[pydantic]==1.21.0');
+    expect(args).toEqual('[all]==1.21.0');
   });
 
-  test('returns only pydantic when no version provided', () => {
+  test('returns only extras when no version provided', () => {
     const args = LambdaPowertoolsLayer.constructBuildArgs(RuntimeFamily.PYTHON, true, undefined);
 
-    expect(args).toEqual('[pydantic]');
+    expect(args).toEqual('[all]');
   });
 
   test('returns only version when no extras flag provided', () => {

test/lambda-powertools-typescript-layer.test.ts

@@ -12,7 +12,7 @@ describe('with minimal configuration the construct', () => {
   const template = Template.fromStack(stack);
   test('synthesizes successfully', () => {
     template.hasResourceProperties('AWS::Lambda::LayerVersion', {
-      Description: 'Lambda Powertools for TypeScript latest version',
+      Description: 'Lambda Powertools for TypeScript [x86_64] latest version',
     });
   });
 
@@ -57,7 +57,7 @@ describe('with version configuration the construct', () => {
 
 
     Template.fromStack(stack).hasResourceProperties('AWS::Lambda::LayerVersion', {
-      Description: `Lambda Powertools for TypeScript version ${version}`,
+      Description: `Lambda Powertools for TypeScript [x86_64] version ${version}`,
     });
   });