AW: Using IPMI for fencing

[John Hodrien]

On Thu, 23 Apr 2009, Eric Rostetter wrote:

> You should at least be able to kill (power down) the machine via IPMI.
> Starting may not work, since most likely if you shutdown the machine,
> the NIC/BMC is down and can't be reached for a start.  Some of the commands
> may allow a restart, but you'll have to test that to find out what works
> and what doesn't.

If using 'chassis power off' left a machine in a state where you couldn't use
'chassis power on' it'd seem a little peverse.  On all the machines I've got
with IPMI, turning it off with IPMI always leaves it in a state where you've
still got full IPMI access.  A normal shutdown also leaves IPMI accessible.
I've only once had a node be inaccessible after an actual power cut.

> Make sure you run the IPMI service.

Only required if you want to access IPMI locally.  The network addressable
side doesn't require OS support, so this step is only required if you want to
setup the BMC without rebooting and using the BIOS.

jh

-- 
"Dare to be naive."                                  -- R Buckminster Fuller