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 .
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¶
staging-wolto the list of
enabled_hardware_typesin /etc/ironic/ironic.conf. Also enable the
staging-wolpower interface and the
fakemanagement interface. For example:
[DEFAULT] enabled_hardware_types = staging-wol,ipmi enabled_management_interfaces = fake,ipmitool enabled_power_interfaces = staging-wol,ipmitool
Restart the Ironic conductor service:
service ironic-conductor restart
Registering a node¶
Nodes configured for Wake-On-Lan driver should have the
property set to
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 .
The following configuration values are optional and can be added to the
driver_info as needed to match the network configuration:
wol_host: The broadcast IP address; defaults to 255.255.255.255.
wol_port: The destination port; defaults to 9.
ironic-conductor is connected to more than one network and
the node you are trying to wake up is in the
192.0.2.0/24 range. The
wol_host configuration should be set to 192.0.2.255 (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.
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.
Associate port with the node created:
openstack baremetal port create --node $NODE <MAC address>
|||Wake-On-Lan - https://en.wikipedia.org/wiki/Wake-on-LAN|
|||Magic packet - https://en.wikipedia.org/wiki/Wake-on-LAN#Sending_the_magic_packet|
|||Ironic node cleaning - https://docs.openstack.org/ironic/latest/admin/cleaning.html|