image-resizer-lambda-serverless

AWS Lambda to resize image when upload image to specific S3 bucket.

Runtime

• Ruby2.7

Deploy & Resource Setting

• Serverless Framework

Setup

required

• Docker
• AWS Account & AWS CLI

Add AWS credential

$ touch docker.env

docker.env

AWS_ACCESS_KEY_ID=xxx
AWS_DEFAULT_REGION=ap-northeast-1
AWS_SECRET_ACCESS_KEY=xxx

docker-compose

$ docker-compose build
$ docker-compose --rm run serverless sh

sh-4.2# bundle config set path 'vendor/bundle'
sh-4.2# bundle install

Debug Lambda

use bundle exec ruby in docker-compose

For example, you insert binding.irb in handler.rb for debug.

You command below

sh-4.2# bundle exec ruby handler.rb

docker-lambda

• WIP

Deploy

sh-4.2# sls deploy

# Remove Resources
sh-4.2# sls remove

Lambda Layer

deploy libvips to lambda layer for native extendions.

use https://github.com/customink/ruby-vips-lambda

$ git clone https://github.com/customink/ruby-vips-lambda.git
$ cd ruby-vips-lambda
$ ./bin/deploy

If you deploy to layer other region(not us-east-1)

• change AWS_DEFAULT_REGION in ruby-vips-lambda/bin/deploy

#!/bin/bash

set -e

./bin/build

export VIPS_VERSION=$(cat share/VIPS_VERSION)
export LAYER_NAME="rubyvips${VIPS_VERSION//./}-27"

# change here
export AWS_REGION=${AWS_REGION:=ap-northeast-1}

aws lambda publish-layer-version \
  --region $AWS_REGION \
  --layer-name $LAYER_NAME \
  --description "Libvips for Ruby FFI." \
  --zip-file "fileb://share/libvips.zip"