RakeTerraform

Provides rake tasks for executing terraform commands as part of a rake build.

Installation

Add this line to your application's Gemfile:

gem 'rake_terraform'

And then execute:

$ bundle

Or install it yourself as:

$ gem install rake_terraform

Usage

Here is sample code to add to your Rakefile:

require 'rake_terraform'

RakeTerraform.define_installation_tasks(
    path: File.join(Dir.pwd, 'vendor', 'terraform'),
    version: '0.11.8')

namespace :network do
  RakeTerraform.define_command_tasks do |t|
    t.configuration_name = 'network'
    t.source_directory = 'infra/network'
    t.work_directory = 'build'
    t.backend_config = {
        bucket: 'some-bucket',
        key: 'some-key.tfstate',
        region: 'eu-west-2'
    }
    t.vars = {
        first_thing: '1',
        second_thing: '2'
    }
  end
end

Now you can execute rake commands:

$ rake network:validate
$ rake network:plan
$ rake network:provision
$ rake network:output
$ rake network:destroy

For a complete example see https://github.com/infrablocks/end-to-end-concourse-ci

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Managing CircleCI keys

To encrypt a GPG key for use by CircleCI:

openssl aes-256-cbc \
  -e \
  -md sha1 \
  -in ./config/secrets/ci/gpg.private \
  -out ./.circleci/gpg.private.enc \
  -k "<passphrase>"

To check decryption is working correctly:

openssl aes-256-cbc \
  -d \
  -md sha1 \
  -in ./.circleci/gpg.private.enc \
  -k "<passphrase>"

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/infrablocks/rake_terraform. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

License

The gem is available as open source under the terms of the MIT License.