Wake-On-Lan driver


Wake-On-Lan is a standard that allows a computer to be powered on by a network message. This is widely available and doesn’t require any fancy hardware to work with [1].

The Wake-On-Lan driver is a testing driver not meant for production. And useful for users that wants to try Ironic with real bare metal instead of virtual machines.

It’s important to note that Wake-On-Lan is only capable of powering on the machine. When power off is called the driver won’t take any action and will just log a message, the power off require manual intervention to be performed.

Also, since Wake-On-Lan does not offer any means to determine the current power state of the machine, the driver relies on the power state set in the Ironic database. Any calls to the API to get the power state of the node will return the value from the Ironic’s database.


  • Wake-On-Lan should be enabled in the BIOS

Configuring and Enabling

  1. Add staging-wol to the list of enabled_hardware_types in /etc/ironic/ironic.conf. Also enable the staging-wol power interface and the fake management interface. For example:

    enabled_hardware_types = staging-wol,ipmi
    enabled_management_interfaces = fake,ipmitool
    enabled_power_interfaces = staging-wol,ipmitool
  2. Restart the Ironic conductor service:

    service ironic-conductor restart

Registering a node

Nodes configured for Wake-On-Lan driver should have the driver property set to staging-wol.

The node should have at least one port registered with it because the Wake-On-Lan driver will use the MAC address of the ports to create the magic packet [2].

The following configuration values are optional and can be added to the node’s driver_info as needed to match the network configuration:

  • wol_host: The broadcast IP address; defaults to
  • wol_port: The destination port; defaults to 9.


Say the ironic-conductor is connected to more than one network and the node you are trying to wake up is in the range. The wol_host configuration should be set to (the broadcast IP) so the packets will get routed correctly.

The following sequence of commands can be used to enroll a node with the Wake-On-Lan driver.

  1. Create node:

    openstack baremetal node create --driver staging-wol \
        --driver-info wol_host=<broadcast ip> \
        --driver-info wol_port=<destination port>

The above command ironic node-create will return UUID of the node, which is the value of $NODE in the following command.

  1. Associate port with the node created:

    openstack baremetal port create --node $NODE <MAC address>

Additional requirements

  • Boot device order should be set to “PXE, DISK” in the BIOS setup
  • BIOS must try next boot device if PXE boot failed
  • Cleaning should be disabled, see [3].
  • Node should be powered off before start of deploy