Quick Start

In a hurry? No problem! Here’s a quick start to using lono that takes only a few minutes. The commands below launches a CloudFormation stack.

$ gem install lono
$ TEMPLATE=ec2 lono new infra
=> Creating new project called infra.
      create  infra
      create  infra/app/definitions/base.rb
      create  infra/app/definitions/development.rb
      create  infra/app/definitions/production.rb
      create  infra/app/templates/example.yml
      create  infra/config/params/base/example.txt
      create  infra/config/params/development/example.txt
      create  infra/config/params/production/example.txt
      create  infra/config/settings.yml
      create  infra/config/variables/base.rb
      create  infra/config/variables/development.rb
      create  infra/config/variables/production.rb
      create  infra/app/scripts
      create  infra/app/user_data
      create  infra/output
=> Installing dependencies with: bundle install
Fetching gem metadata from https://rubygems.org/..
Bundle complete! 1 Gemfile dependency, 37 gems now installed.
=> Initialize git repo
Congrats 🎉 You have successfully created a lono project.

Cd into your project and check things out:

  cd infra

The example template uses a keypair named default. Be sure that keypair exists.  Or you can adjust the KeyName parameter in config/params/base/example.txt. Here are contents of the file:


To launch an example CloudFormation stack:

  lono cfn create example

To re-generate your templates without launching a stack, you can run:

  lono generate

The generated CloudFormation templates are in the output/templates folder.
The generated stack parameters are in the output/params folder.

$ cd infra
$ lono cfn create example # launches stack

The last command does a few things:

  1. Generate templates and params files from app/definitions and app/templates to output/templates.
  2. Generate parameter files from config/params to output/params.
  3. Use the output files to launch a CloudFormation stack.

The example launches an EC2 instance with a security group. Check out the newly launch stack in the AWS console:

Stack Created

Congratulations! You have successfully created a CloudFormation stack with lono. It’s that simple. 😁

Summarized Commands

Here are the commands again in compact summarized form for copy and paste:

gem install lono
TEMPLATE=ec2 lono new infra
cd infra
lono cfn create example # launches stack

Pro tip: Use the <- and -> arrow keys to move back and forward.

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