Demo Using GenAI to Generate Steps for Lambda Deployment

Before automating AWS Lambda deployment with a Jenkins pipeline, it’s crucial to adapt a Node.js application (originally designed for Docker on EC2 and Kubernetes) to run seamlessly in a serverless environment. Instead of sifting through extensive AWS documentation, we used Microsoft Copilot to outline high-level steps. Below are the questions we asked and the concise answers that guided our Lambda-ready changes and pipeline design.

1. What are the steps required to deploy a Node.js application to AWS Lambda using a Jenkins pipeline?

The image shows a Visual Studio Code interface with a markdown file open, containing steps and questions related to deploying a Node.js app to AWS Lambda using a Jenkins pipeline. The terminal at the bottom is connected to a server.

Copilot mapped out these key stages:

Configure AWS and Jenkins
- Ensure AWS CLI is installed and credentials are set:
  aws configure
- Install Jenkins plugins: Git, NodeJS, AWS Lambda, Pipeline
Install Dependencies
npm install
Run Tests (if applicable)
npm test

Package the Application

zip -r my-node-app.zip index.js node_modules

Deploy to Lambda

aws lambda create-function \
  --function-name my-node-app \
  --zip-file fileb://my-node-app.zip \
  --handler index.handler \
  --runtime nodejs14.x \
  --role arn:aws:iam::<AWS_ACCOUNT_ID>:role/<ROLE_NAME>

Define Jenkins Pipeline (Jenkinsfile)

pipeline {
  agent any
  stages {
    stage('Checkout') { steps { git url: 'https://repo-url.git' } }
    stage('Install')  { steps { sh 'npm install' } }
    stage('Test')     { steps { sh 'npm test' } }
    stage('Package')  { steps { sh 'zip -r my-node-app.zip index.js node_modules' } }
    stage('Deploy') {
      steps {
        withAWS(credentials: 'aws-creds') {
          sh '''
          aws lambda update-function-code \
            --function-name my-node-app \
            --zip-file fileb://my-node-app.zip \
            --publish
          '''
        }
      }
    }
  }
}

Ensure that your Jenkins aws-creds credential has the necessary IAM permissions to create and update Lambda functions.

To summarize, here’s a quick overview of each pipeline stage:

Stage	Description	Command
Checkout	Clone the Git repository	`git clone https://repo-url.git`
Install	Install Node.js dependencies	`npm install`
Test	Run unit and integration tests	`npm test`
Package	Archive the application code and dependencies	`zip -r my-node-app.zip index.js node_modules`
Deploy	Update AWS Lambda function code	`aws lambda update-function-code --function-name my-node-app --zip-file fileb://my-node-app.zip --publish`

2. Are there any specific Lambda or serverless dependencies to add?

To adapt Express for Lambda’s event-driven model, install these packages:

npm install express serverless-http
# (Optional) Install the Serverless Framework CLI globally
npm install -g serverless

The serverless-http library wraps your Express application into a handler function that AWS Lambda can invoke.

3. Do we need to modify the application code (`app.js`) for AWS Lambda?

Yes. Wrap your Express app using serverless-http and export the handler:

const express = require('express');
const serverless = require('serverless-http');
const app = express();

app.get('/', (req, res) => {
  res.send('Hello, AWS Lambda!');
});

module.exports.handler = serverless(app);

The image shows a webpage from Copilot, explaining how to build AWS Lambda functions using Node.js and Express. It details the use of module.exports, handler, and serverless(app) for adapting applications to AWS Lambda.

4. What is the AWS CLI command to update a Lambda function’s code?

If your function already exists, run:

aws lambda update-function-code \
  --function-name my-node-app \
  --zip-file fileb://my-node-app.zip \
  --publish

Or update from an S3 bucket:

aws lambda update-function-code \
  --function-name my-node-app \
  --s3-bucket my-bucket \
  --s3-key my-node-app.zip

5. How can we retrieve the Function URL configuration via AWS CLI?

To fetch the function URL settings after deployment:

aws lambda get-function-url-config \
  --function-name my-node-app

With these steps, you now have a clear roadmap:

Integrate serverless-http into your Node.js app and export a Lambda handler.
Zip your application code and dependencies.
Use AWS CLI commands within a Jenkins pipeline to deploy and update your Lambda function.
Retrieve and test the Function URL configuration with a simple CLI call.

In the next session, we’ll manually execute these commands to confirm the deployment before fully automating the workflow using our Jenkins pipeline.

Links and References

Watch Video

AWS Lambda Basics

Demo Manual Lambda Deployment

Introduction and Basics

Jenkins Setup and Interface

Extending Jenkins and Administration

Jenkins Pipelines

Automation and Security

Setting up CI Pipeline

Code Quality and Testing

Containerization and Deployment

Kubernetes and GitOps

AWS Lambda and Advanced Deployment Techniques

Jenkins Administration and Monitoring - Part 1

Shared Libraries in Jenkins

Agents and Nodes in Jenkins

Pipeline Enhancement and Caching

Pipeline Structure and Scripted vs Declarative

Jenkins Administration and Monitoring - Part 2

Backup and Configuration Management

Demo Using GenAI to Generate Steps for Lambda Deployment

1. What are the steps required to deploy a Node.js application to AWS Lambda using a Jenkins pipeline?

2. Are there any specific Lambda or serverless dependencies to add?

3. Do we need to modify the application code (`app.js`) for AWS Lambda?

4. What is the AWS CLI command to update a Lambda function’s code?

5. How can we retrieve the Function URL configuration via AWS CLI?

Links and References

Watch Video

​1. What are the steps required to deploy a Node.js application to AWS Lambda using a Jenkins pipeline?

​2. Are there any specific Lambda or serverless dependencies to add?

​3. Do we need to modify the application code (app.js) for AWS Lambda?

​4. What is the AWS CLI command to update a Lambda function’s code?

​5. How can we retrieve the Function URL configuration via AWS CLI?

​Links and References

Watch Video

1. What are the steps required to deploy a Node.js application to AWS Lambda using a Jenkins pipeline?

2. Are there any specific Lambda or serverless dependencies to add?

3. Do we need to modify the application code (`app.js`) for AWS Lambda?

4. What is the AWS CLI command to update a Lambda function’s code?

5. How can we retrieve the Function URL configuration via AWS CLI?

Links and References