add_nic.rb

  def add_nic(name)
    network = find_network(options["net"])

    puts network.class
    case network
    when RbVmomi::VIM::DistributedVirtualPortgroup
      switch, pg_key = network.collect 'config.distributedVirtualSwitch', 'key'
      port = RbVmomi::VIM.DistributedVirtualSwitchPortConnection(
        switchUuid: switch.uuid,
        portgroupKey: pg_key)
      summary = network.name
      backing = RbVmomi::VIM.VirtualEthernetCardDistributedVirtualPortBackingInfo(port: port)
    when VIM::Network
      summary = network.name
      backing = RbVmomi::VIM.VirtualEthernetCardNetworkBackingInfo(deviceName: network.name)
    else fail
    end

    vm = find_by_name(name)
    vm.ReconfigVM_Task(spec: {
      deviceChange: [
        { operation: :add,
          fileOperation: nil,
          device: RbVmomi::VIM::VirtualVmxnet3(
            key: -1,
            deviceInfo: {
              summary: summary,
              label: ""
            },
            backing: backing,
            addressType: "generated"
          )
      }
      ]}).wait_for_completion
  end