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