[Nut-upsuser] Batch shutdown?

[Moorcroft, Mark (ARC-TSM)[ERC, Inc.]]

Hello list,

I am a pretty green Linux admin managing 3 ROCKS CentOS clusters total
about 2,000 cores. My predecessor set up NUT for me on the primary head
node. We have about 42 Tripplite UPS units in the room. The way our power
systems work I intend to use the NUT connected head node to shut down the
entire server room any time power is lost for over 30 seconds or so. It is
about 95% likely that any time the head node loses power the whole room
has lost power. And for the most part we have no more than 2 to 3 minutes
of battery power anyway so even a 30 second wait will be pushing things.
The head node will be the only thing with a data connection to a UPS. The
rest of the shutdown process must happen over the network.

Can anyone point me to any resources to help me set up such a scenario? Is
there any reason to run NUT anyplace besides the head node? What are the
best practices for a scripted/staged shutdown. I have my concerns that we
don¹t have the battery capacity for a wait time and orderly shutdown of
the nodes and the RAID units. Our reseller GROSSLY underestimated the load
requirements of the equipment they sold us.

-- 


Mark Moorcroft
ERC Corp.
650-604-4784
mailto:mark.moorcroft at nasa.gov