AWS Lambda Image Resize

An AWS Lambda function that will resize and compress images when an image. This function will be triggered when a new image is uploaded to a defined AWS S3 bucket.

I found 2 different articles which do the same but I could not get either of them working. The first and the second. I kept getting errors with certain packages and with missing layers, with that I decided to write this user friendly and simple guide.

Basic Flow

• Function should be invoked by an AWS S3 trigger when a new image is uploaded to a defined bucket.
• Once triggered, the function will resize and compress the image
• The new images will be saved in a bucket with the name of your current bucket with a suffix of -output
• Each resized image will be saved in its corresponding folder

You can easily configure the widths of the resized image and their destination bucket/subfolder

Usage

• Create you Lambda function with an AWS S3 trigger
• Run npm install to install all dependencies
• Now, pack the index.js script and the node_modules in a zip archive.
• Upload this package to your Lambda
• Define your Lambdas timeout, memory size and description
• Define your Lambda Layers
  • You will need deploy and then add the image-magick-lambda-layer to your Lambda Layers