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Capistrano::Ec2

Useful for dynamically building a list of Amazon EC2 instances to deploy to.

Installation

Add this line to your application's Gemfile:

gem 'capistrano-ec2'

And then execute:

$ bundle

Or install it yourself as:

$ gem install capistrano-ec2

Usage

Requirements:

Set the EC region in which your instances live in the Capistrano deploy configuration:

config/deploy.rb

set :region, 'us-west-2'

Since it's a bad practice to have your credentials in source code, you should load them from default fog configuration file: ~/.fog. This file could look like this:

default:
  aws_access_key_id:     <YOUR_ACCESS_KEY_ID>
  aws_secret_access_key: <YOUR_SECRET_ACCESS_KEY>

As an alternative to directly using credentials, you can also use IAM instance profiles by setting :use_iam_profile to true in the deploy configuration.

Usage:

Tag your EC2 instances so you can target specific servers in your Capistrano configuration.

Here is how to target all production application-servers:

for_each_ec2_server(ec2_env: "production", ec2_role: "application-server") do |ec2_server|
  server ec2_server.private_ip_address, user: 'deploy', roles: roles
end

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.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/tomdev/capistrano-ec2.

License

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

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