[Linux-cluster] HP DL380 G4 & cluster fencing options

Jones, Dave Dave.Jones at maritz.com
Fri Sep 26 21:52:16 UTC 2008

(I apologize if this double-posts, long story) 

Hello all.

I have what I hope are a few simple questions on RHEL 5.2 clustering
using HP DL380 hardware.

Long story short, we have several HP DL380-G4s that we are trying to set
up in a test cluster but we do not have any of the obvious fencing
options available to us.  ILO fencing does not seem to be an option
because our standards dictate ILO be on an out-of-band network.
We have SCSI fencing in place but I'm not convinced it is working
properly nor that it is reliable.
I hope to find funding to get an APC Masterswitch in place but that is
not our standard so I need approval.

In the meantime, can anyone offer any answers on the following

1) Are TripLite or other power controllers supported aside from what is
on the hardware list?

2) Is there a reliable way to change the SAN switch fencing controls to
use SNMP (preferred) or perhaps SSH?
	According to 'man fence_brocade' the system uses telnet.
	An interactive login to a 256-port switch is bad enough, but
doing so over an unencrypted telnet session just isn't going to fly!
	I would think this would be a relatively trivial change to the
	Has anyone done something like it?

3) Does anyone have any experience clustering DL380s and have
recommended Primary & Secondary fencing methods or advice they would be
willing to share?

4) Is anyone out there using only 1 fencing method with GFS filesystems
in Production environment?


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