Ruby Libvips Lambda Layer
Are you using the ruby-vips gem? Maybe you are using the ImageProcessing::Vips interface of the fantastic image_processing gem which Rails v6 & ActiveStorage will use?
Maybe you are using our Lamby infrastructure to deploy your Rails app to AWS Lambda using simple Rack integration and documentation? If yes to any of the above, this Lambda Layer is just for you.
Lamby: Simple Rails & AWS Lambda Integration using Rack.
Usage
- Clone or fork this repository.
- Make sure you have Docker or AWS CLI installed.
- Run
./bin/deploy
From there you simply use the arn in your AWS SAM template.yaml file.
Methodology
Simplicity and small file size! We followed the docs for libvips install. But because AWS Lambda already has ImageMagick and lots of the needed dependencies, the work was very basic.
We used the lambci/lambda:build-ruby2.5 Docker image from the docker-lambda project. From there we only had to install a few more dependencies to get libvips installed. The current version is v8.7.4 and easy to configure if you need something else.
Lastly, we were happy to find that glib and gobject were already installed and all that was needed were some simple sym links so FFI could load these libraries.
Contents
Because of the way we build libvips by using existing libraries already installed on AWS Lambda, the resulting layer is very small. Only around 9MB in total un-compressed size.
$ ls -lAGp /opt/lib
total 9517
lrwxrwxrwx 1 root 27 Apr 15 20:46 libglib-2.0.so -> /usr/lib64/libglib-2.0.so.0
lrwxrwxrwx 1 root 30 Apr 15 20:46 libgobject-2.0.so -> /usr/lib64/libgobject-2.0.so.0
lrwxrwxrwx 1 root 17 Apr 15 20:46 libvips.so -> libvips.so.42.9.5
lrwxrwxrwx 1 root 17 Apr 15 20:46 libvips.so.42 -> libvips.so.42.9.5
-rwxr-xr-x 1 root 9745021 Apr 15 20:45 libvips.so.42.9.5