class Ubuntu

Author

Joshua Timberman (<joshua@housepub.org>)

Description

Retrieves AMI information from Canonical's AMI release list.

Copyright

2011, Joshua Timberman

Licensed under the Apache License, Version 2.0 (the “License”); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an “AS IS” BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Attributes

release_name[R]

Public Class Methods

instance_for_release(release_name) click to toggle source
# File lib/ubuntu_ami.rb, line 28
def self.instance_for_release(release_name)
  @releases ||= {}
  @releases[release_name] ||= new(release_name)
end
new(release_name) click to toggle source
# File lib/ubuntu_ami.rb, line 33
def initialize(release_name)
  @release_name = release_name
end
release(release_name) click to toggle source
# File lib/ubuntu_ami.rb, line 24
def self.release(release_name)
  instance_for_release(release_name)
end

Public Instance Methods

amis() click to toggle source

Map the output from Canonical's image list.

Returns

Array

An array of Ubuntu::Ami objects.

# File lib/ubuntu_ami.rb, line 41
def amis
  content.map do |line|
    Ami.new(
            line.split[7],
            line.split[4],
            line.split[5],
            line.split[6],
            line.split[8..9].last)
  end
end
content() click to toggle source

Reads the URL for processing.

Exception

Raises an exception if the release name was not specified or was not found.

# File lib/ubuntu_ami.rb, line 68
def content
  begin
    @content ||= ::OpenURI.open_uri(url).read.split("\n")
  rescue
    raise "Could not find AMI list for distro release '#{release_name}', did you specify it correctly? (e.g., 'lucid')"
  end
end
url() click to toggle source

The URL of Canonical's current released AMIs for the given release.

Visit “uec-images.ubuntu.com/query” to get a list of available releases.

Returns

String

The full URL to the released AMIs.

# File lib/ubuntu_ami.rb, line 60
def url
  "http://uec-images.ubuntu.com/query/#{release_name}/server/released.current.txt"
end