Linux Training in Coimbatore & Best Linux Server Administration Training Institute: AWS LAMBDA

Lambda Configuration

Services -> Lambda

Create a Lambda Function

Click on the Create a function button.

Choose Author from scratch.

Function name: mylambdafunction
Runtime: Select Node.js 12x

Role: In the permissions section, select use an existing role.

Existing role: Select myrole

Click on Create function

Configuration Page: On this page, we need to configure our lambda function.

If you scroll down a little bit, you can see the Function code section. Here we need to write a NodeJs function which copies the object from the source bucket and paste it into the destination bucket.

Remove the existing code in AWS lambda index.js. Copy the below code and paste it into your lambda index.js file.

var AWS = require("aws-sdk");
exports.handler = (event, context, callback) => {
    var s3 = new AWS.S3();
    var sourceBucket = "your_source_bucket_name";
    var destinationBucket = "your_destination_bucket_name";
    var objectKey = event.Records[0].s3.object.key;
    var copySource = encodeURI(sourceBucket + "/" + objectKey);
    var copyParams = { Bucket: destinationBucket, CopySource: copySource, Key: objectKey };
                               s3.copyObject(copyParams, function(err, data) {
        if (err) {
            console.log(err, err.stack);
        } else {
            console.log("S3 object copy successful.");
        }
    });
};