Creating a lambda function in AWS from zip file

Question

I am trying to create a simple lambda function, and I\'m running into an error.

My code is basically

console.log(\'Loading function\');

exports.han         


        

Answer 1

Automation - using Grunt

Complete AWS Lambda Seed project is available on Git.

Step 1: Init npm module

npm init

Step 2: Install Grunt

npm install --save-dev grunt grunt-cli

Step 3: Install grunt-aws-lambda

npm install --save-dev grunt-aws-lambda

Step 4: Create Folder for Lambda service

# Create directory
mkdir lambdaTest

# Jump into folder
cd lambdaTest

# Create service file
touch lambdaTest.js

# Initialize npm
npm init

Keep your logic/code into lambdaTest.js

'use strict'

exports.handler = (event, context, callback) => {
    console.log("Hello it's looks like working");
};

Step 5: Create Gruntfile.js

Navigate back to root folder touch Gruntfile.js

'use strict'
module.exports = function (grunt) {
    grunt.initConfig({
        lambda_invoke: {
            lambdaTest: {
                options: {
                    file_name: "lambdaTest/lambdaTest.js",
                    event: "lambdaTest/test.json",
                }
            }
        },
        lambda_package: {
            lambdaTest: {
                options: {
                    package_folder: 'lambdaTest/'
                }
            }
        },
        lambda_deploy: {
            lambdaTest: {
                arn: 'arn:aws:lambda:eu-central-1:XXXXXXXX:function:lambdaTest',
                options: {
                    credentialsJSON: 'awsCredentials.json',
                    region: "eu-central-1"
                },
            }
        },
    });

    grunt.loadNpmTasks('grunt-aws-lambda');


    grunt.registerTask('ls-deploy', ['lambda_package:lambdaTest', 'lambda_deploy:lambdaTest']);
};

Step 6: Create awsCredentials.js

Create AWS IAM User with custom policy, Custom policy should have access to lambda:GetFunction, lambda:UploadFunction, lambda:UpdateFunctionCode, lambda:UpdateFunctionConfiguration and iam:PassRole

{
    "accessKeyId": "XXXXXXXXXXXXXXXXXXXX",
    "secretAccessKey": "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
}

Step 7: Create a zip and deploy to AWS Lambda.

ls-deploy is custom task created by in Gruntfile above, which creates a zip of source code and deploy to Lambda.

grunt ls-deploy

Complete AWS Lambda Seed project is available on Git.