Method: CloudMaker::EC2#launch

Defined in:
lib/cloud_maker/ec2.rb

#launch(cloud_maker_config) ⇒ Object

Public: Launches a new EC2 instance, associates any specified elastic IPS with it, adds any specified tags, and archives the launch details to S3.

Returns an AWS::EC2 object for the launched instance.



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# File 'lib/cloud_maker/ec2.rb', line 109

def launch(cloud_maker_config)
  user_data = cloud_maker_config.to_user_data

  if !cloud_maker_config['availability_zone'].nil? && !cloud_maker_config['availability_zone'].empty?
    region = find_region(cloud_maker_config['availability_zone'])
  else
    region = ec2 # .instances.create will just put things in the default region
  end

  config = {
    :image_id => cloud_maker_config['ami'],
    :iam_instance_profile => cloud_maker_config['iam_role'],
    :security_groups => cloud_maker_config['security_group'],
    :instance_type => cloud_maker_config['instance_type'],
    :key_name => cloud_maker_config['key_pair'],
    :availability_zone => cloud_maker_config['availability_zone'],
    :user_data => user_data
  }
  config[:block_device_mappings] = cloud_maker_config['block_device_mappings'] if cloud_maker_config['block_device_mappings']

  instance = region.instances.create(config)

  begin
    if cloud_maker_config['tags']
      # we can only set tags to be strings so make sure we convert all of our tags
      # to strings
      string_tags = cloud_maker_config['tags'].inject({}) do |hash, pair|
        hash[pair[0]] = pair[1].to_s
        hash
      end
      instance.tags.set(string_tags)
    end
  rescue AWS::EC2::Errors::InvalidInstanceID::NotFound => e
    retries ||= 0
    if retries < 5
      sleep(2**retries)
      retries += 1
      retry
    end
  end

  if cloud_maker_config.elastic_ip? || cloud_maker_config.cname?
    while instance.status == :pending
      #wait
    end
    instance.associate_elastic_ip(cloud_maker_config["elastic_ip"]) if cloud_maker_config.elastic_ip?

    if cloud_maker_config.cname?
      r53 = AWS::Route53::Client.new(:access_key_id => self.aws_access_key_id, :secret_access_key => self.aws_secret_access_key)

      zone = r53.list_hosted_zones[:hosted_zones].select {|zone|
        cloud_maker_config['cname'] + '.' =~ /#{Regexp.escape(zone[:name])}$/
      }.first

      r53.change_resource_record_sets(
        :hosted_zone_id => zone[:id],
        :change_batch => {
          :comment => "CloudMaker initialization of #{instance.instance_id}.", :changes => [{
            :action => "CREATE", :resource_record_set => {
              :name => cloud_maker_config['cname'],
              :type => 'CNAME',
              :ttl => 60,
              :resource_records => [{:value => instance.dns_name}]
            }
          }]
        }
      )
    end
  end

  if cloud_maker_config.elb?
    while instance.status == :pending
      #wait
    end
    elb_interface = ElbInterface.new(
      :instance => instance,
      :aws_access_key_id => self.aws_access_key_id,
      :aws_secret_access_key => self.aws_secret_access_key,
      :elb_name => cloud_maker_config["elb"]
    ).attach
  end
  
  archiver = S3Archiver.new(
    :instance_id => instance.id,
    :aws_access_key_id => self.aws_access_key_id,
    :aws_secret_access_key => self.aws_secret_access_key,
    :bucket_name => cloud_maker_config["tags"][BUCKET_TAG]
  )
  archiver.store_archive(cloud_maker_config, self.class.instance_to_hash(instance))

  instance
end