InstanceSelector

A simple interface for querying DNS names cloud hosting environments based on searching cloud meta data. It also provides a liberal Capistrano interface for identifying deploy targets.

Currently supporting:

  • AWS
    • ec2 instance filtering

Installation

Add this line to your application's Gemfile:

gem 'instance_selector'

And then execute:

$ bundle

Or install it yourself as:

$ gem install instance_selector

Usage

By default, only running instances will be included in the results. Overriding this restriction is in the TODO section.

Standalone

require 'instance_selector/connection'
conn = InstanceSelector::Connection.factory(:aws)
instances = connection.instances(:tags => {"Environment" => "staging"})

With Capistrano

require 'instance_selector/capistrano'
instance_selector :app, :aws, :tags => {"Environment" => "staging"}

Filters

http://docs.aws.amazon.com/AWSEC2/latest/APIReference/ApiReference-query-DescribeInstances.html

TODO

  • Tests
  • filters (e.g., :filters => => nil to clear the running instance filter)
  • AWS
    • ELB support
    • attach/detach
    • selecting all instances in an ELB

Contributing

  1. Fork it
  2. Create your feature branch (git checkout -b my-new-feature)
  3. Commit your changes (git commit -am 'Add some feature')
  4. Push to the branch (git push origin my-new-feature)
  5. Create new Pull Request

License

Copyright (c) 2013 Kevin McFadden

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.