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fog--fog/lib/fog/aws/cloud_formation.rb

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require 'fog/aws'
module Fog
module AWS
class CloudFormation < Fog::Service
extend Fog::AWS::CredentialFetcher::ServiceMethods
requires :aws_access_key_id, :aws_secret_access_key
recognizes :host, :path, :port, :scheme, :persistent, :region, :use_iam_profile, :aws_session_token, :aws_credentials_expire_at
request_path 'fog/aws/requests/cloud_formation'
request :create_stack
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request :update_stack
request :delete_stack
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request :describe_stack_events
request :describe_stack_resources
request :describe_stacks
request :get_template
request :validate_template
request :list_stacks
request :list_stack_resources
class Mock
def initialize(options={})
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Fog::Mock.not_implemented
end
end
class Real
include Fog::AWS::CredentialFetcher::ConnectionMethods
# Initialize connection to CloudFormation
#
# ==== Notes
# options parameter must include values for :aws_access_key_id and
# :aws_secret_access_key in order to create a connection
#
# ==== Examples
# cf = CloudFormation.new(
# :aws_access_key_id => your_aws_access_key_id,
# :aws_secret_access_key => your_aws_secret_access_key
# )
#
# ==== Parameters
# * options<~Hash> - config arguments for connection. Defaults to {}.
#
# ==== Returns
# * CloudFormation object with connection to AWS.
def initialize(options={})
require 'fog/core/parser'
@use_iam_profile = options[:use_iam_profile]
setup_credentials(options)
@connection_options = options[:connection_options] || {}
options[:region] ||= 'us-east-1'
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@host = options[:host] || "cloudformation.#{options[:region]}.amazonaws.com"
@path = options[:path] || '/'
@persistent = options[:persistent] || false
@port = options[:port] || 443
@scheme = options[:scheme] || 'https'
@connection = Fog::Connection.new("#{@scheme}://#{@host}:#{@port}#{@path}", @persistent, @connection_options)
end
def reload
@connection.reset
end
private
def setup_credentials(options)
@aws_access_key_id = options[:aws_access_key_id]
@aws_secret_access_key = options[:aws_secret_access_key]
@aws_session_token = options[:aws_session_token]
@aws_credentials_expire_at = options[:aws_credentials_expire_at]
@hmac = Fog::HMAC.new('sha256', @aws_secret_access_key)
end
def request(params)
refresh_credentials_if_expired
idempotent = params.delete(:idempotent)
parser = params.delete(:parser)
body = Fog::AWS.signed_params(
params,
{
:aws_access_key_id => @aws_access_key_id,
:aws_session_token => @aws_session_token,
:hmac => @hmac,
:host => @host,
:path => @path,
:port => @port,
:version => '2010-05-15'
}
)
begin
response = @connection.request({
:body => body,
:expects => 200,
:idempotent => idempotent,
:headers => { 'Content-Type' => 'application/x-www-form-urlencoded' },
:host => @host,
:method => 'POST',
:parser => parser
})
rescue Excon::Errors::HTTPStatusError => error
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if match = error.message.match(/(?:.*<Code>(.*)<\/Code>)(?:.*<Message>(.*)<\/Message>)/m)
raise case match[1].split('.').last
when 'NotFound', 'ValidationError'
Fog::AWS::CloudFormation::NotFound.slurp(error, match[2])
else
Fog::AWS::CloudFormation::Error.slurp(error, "#{match[1]} => #{match[2]}")
end
else
raise error
end
end
response
end
end
end
end
end