Rails Support - Jets Afterburner
Rails Support - Jets Afterburner ๊ด๋ จ
In this post and video, weโll cover how to deploy a Rails application to AWS Lambda Serverless in a few minutes. With Jets Afterburner, you donโt have to make any changes to your Rails application to get it on AWS Lambda. ๐
Commands
gem install jets # outside of Gemfile
git clone https://github.com/tongueroo/demo-rails
cd demo-rails
mkdir -p .jets/app
vim .jets/app/.env # add your env variables
jets deploy
#
# => Rails app detected: Enabling Jets Afterburner to deploy to AWS Lambda.
# ...
# Deploying CloudFormation stack with jets app!
# 05:05:11PM UPDATE_IN_PROGRESS AWS::CloudFormation::Stack demo-rails-dev User Initiated
# ...
# 05:06:48PM UPDATE_COMPLETE AWS::CloudFormation::Stack demo-rails-dev
# Stack success status: UPDATE_COMPLETE
# Time took for stack deployment: 1m 36s.
# Prewarming application.
# API Gateway Endpoint: https://jp65zxlwf8.execute-api.us-west-2.amazonaws.com/dev/
#
Thatโs it! We have successfully deployed our Rails application to AWS Lambda. Hereโs the Live Demo from the tutorial. The full source code of the Rails project is on Github: tongueroo/demo-rails. More info is available at: Jets Rails Support: Afterburner Mode.
Extra Environments
An interesting benefit of running applications on AWS Lambda is that you only get charged for actual requests. So extra environments are likely in the AWS free tier. You could do this:
JETS_ENV_EXTRA=2 jets deploy
JETS_ENV_EXTRA=3 jets deploy
...
JETS_ENV_EXTRA=8 jets deploy
You essentially get unlimited free environments, each of them taking a few minutes to provision.
Other Live Demos
More examples are in the tongueroo/jets-examples repo.
Considerations
Afterburner mode is pretty awesome but is not a panacea for all Rails applications. Each and every Rails application is different and likely makes assumptions that itโs running on a traditional server not serverless. For example, the app might upload files or images to the filesystem. This doesnโt work on AWS Lambda because the app doesnโt have access to a persistent filesystem. The application would have to be reworked to use a distributed store like S3 instead.
Ruby serverless applications might also use native binary gems. Jets uses Lambda Gems to make for a seamless and much easier deploy process. Lambda Gems is currently in beta, and early signups will receive a special offer for their support.
More info
- For an Jets Introduction: Introducing Jets: A Ruby Serverless Framework.
- Also more info at: Jets documentation site.
