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Merged
armaan-71 merged 2 commits into from
Feb 26, 2026
Merged

Feat/docker lambda build #37

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df5b1d4
infra: require docker for cdk python build
armaan-71 Feb 26, 2026
5c25135
build(lambda): align python runtime with arm64
armaan-71 Feb 26, 2026
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1 change: 1 addition & 0 deletions README.md
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Expand Up @@ -156,6 +156,7 @@ Outpost infrastructure is defined as code using **AWS CDK**.

- [AWS CLI](https://aws.amazon.com/cli/) installed and configured
- Node.js installed
- [Docker](https://www.docker.com/products/docker-desktop/) running in the background (Required by AWS CDK to cross-compile Python C-extensions like `lxml` for the AWS Linux environment)

### Setup

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26 changes: 7 additions & 19 deletions infra/lib/outpost-stack.ts
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Expand Up @@ -120,28 +120,16 @@ export class OutpostStack extends cdk.Stack {

const processRunFunction = new lambda.Function(this, 'ProcessRunFunction', {
runtime: lambda.Runtime.PYTHON_3_12,
architecture: lambda.Architecture.ARM_64,
handler: 'process_run.handler',
code: lambda.Code.fromAsset(path.join(__dirname, '../../backend/python/src/handlers'), {
code: lambda.Code.fromAsset(path.join(__dirname, '../../backend/python'), {
bundling: {
image: lambda.Runtime.PYTHON_3_12.bundlingImage,
local: {
tryBundle(outputDir: string) {
try {
// Install dependencies into the output directory
execSync(
`pip3 install -r ${path.join(__dirname, '../../backend/python/requirements.txt')} -t ${outputDir}`,
);
// Copy the handler code into the output directory
execSync(
`cp -R ${path.join(__dirname, '../../backend/python/src/handlers/process_run.py')} ${outputDir}`,
);
return true;
} catch (e) {
console.warn('Local Python bundling failed:', e);
return false;
}
},
},
command: [
'bash',
'-c',
'pip install -r requirements.txt -t /asset-output --platform manylinux2014_aarch64 --only-binary=:all: && cp -R src/handlers/* /asset-output/',
],
},
}),
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@gemini-code-assist gemini-code-assist Bot Feb 26, 2026

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medium

For consistency with the Go Lambda functions in this stack which use ARM64, consider specifying the architecture for this Python function as well. ARM-based Lambdas can also provide better price/performance.

If you switch to ARM64, you'll need to update the bundling command to install the correct platform-specific wheels for your dependencies.

      runtime: lambda.Runtime.PYTHON_3_12,
      architecture: lambda.Architecture.ARM_64,
      handler: 'process_run.handler',
      code: lambda.Code.fromAsset(path.join(__dirname, '../../backend/python'), {
        bundling: {
          image: lambda.Runtime.PYTHON_3_12.bundlingImage,
          command: [
            'bash',
            '-c',
            'pip install -r requirements.txt -t /asset-output --platform manylinux2014_aarch64 --only-binary=:all: && cp -R src/handlers/* /asset-output/',
          ],
        },
      }),

environment: {
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