Add CDROM to Vsphere VM

vsphere_cdrom.rb

require 'rubygems'
require 'rbvmomi'

machine_conf_spec = RbVmomi::VIM.VirtualMachineConfigSpec(
  :deviceChange => [{
    :operation => :add,
    :device => RbVmomi::VIM::VirtualCdrom(
      :key => 2,
      :connectable => RbVmomi::VIM::VirtualDeviceConnectInfo(
        :startConnected => true,
        :connected => true,
        :allowGuestControl => true
      )
    )}]
)

def find_vm(host, username, password, name)
  vsphere = RbVmomi::VIM.connect(:host => host, :user => username, :password => password, :insecure => true)
  rootFolder = vsphere.serviceInstance.content.rootFolder
  vm = {}
  rootFolder.childEntity.grep(RbVmomi::VIM::Datacenter).each do |dc|
    dc.datastoreFolder.childEntity.collect do |datastore|
      vm[:instance] = datastore.vm.find { |x| x.name == name }
      if vm[:instance]
        vm[:datastore] = datastore.name
        break
      end
    end
    break if vm[:datastore]
  end
  vm
end


instance = find_vm('xxxxxx.xxx.xxx.redhat.com', 'admin', 'password', VIRTUAL_MACHINE_ID)
instance.ReconfigVM_Task(:spec => machine_conf_spec).wait_for_completion