Rebooting nodes

Rebooting of (virtual) OpenStack instances is done via

$ openstack server reboot [--soft|hard] <instance>

For bare metal instances managed by the IPMI driver, the command is also available and will translate to a sequence of ipmitool commands:

change the power state
wait for the node to be powered off
switch the node on

The change of the power state will be via ACPI, i.e. chassis power soft on --soft (and also if no parameter is specified) and chassis power off on --hard.

Note that Ironic may fall back from chassis power soft to chassis power off in case the former does not work.