[Linux-cluster] Recommended HP servers for cluster suite

[Kovacs, Corey J.]

I believe you can simply turn acpid off to disable the power management. 

As far as SIM and shutdown goes, you should still be able to. The power
management stuff is just that part that intercepts front panel power button
hits and sends the computer into shutdown instead of a hard power off. It's 
useful for headless machines so you don't have to remote login, or connect
a head just to power down a machine. The problem is that the iLO function 
for powering off the machine, is the equivelent of a button push, and
therefore
sends the machine into init 6.

As far as taking a while for the machine to shutdown, that's why in my
message
I suggested doing a "power reset" rather than an "power off" since a power
reset
actually pulls the carpet out from under the machine no matter what.


Regards


Corey



>I have something to get clarify with you about 'Disabling the Power
Management' (I'm not quite sure whether >my question is lacks my knowledge on
HP servers)

>If you disable the power Management, is it possible to boot/reboot/shutdown
the server from web-based SIM >utility? I believe there should be interaction
between iLO and Power Management.

>I hope my second question is posted and replied already - rebooting Vs power
off. Sending node to runlevel 6 >- What if server hung long time before
network service down! Will other node wait or takeover the package ran on
that hung server - this will crash right?



-----Original Message-----
From: linux-cluster-bounces at redhat.com
[mailto:linux-cluster-bounces at redhat.com] On Behalf Of Kovacs, Corey J.
Sent: Friday, May 05, 2006 6:51 PM
To: linux clustering
Subject: RE: [Linux-cluster] Recommended HP servers for cluster suite

iLO fencing works just fine. You might be missing perl-Crypt-SSLeay which is
required for iLO fencing. You need to put all the fence_ilo options in the
"fence.ccs"
and the
option ' action = reboot (or off) for in the fence section of your nodes.ccs
file on 
RHEL3+GFS6.0x. If you are using RHEL4 + GFS 6.1, then it is simpler 
RHEL3+since
the
config
is expected to be in the same file etc.

In either case, you need to make sure the web access to the iLO port is
working and that you have a valid account in the iLO config (the built in
Administrator account will work) Also, if you are using RHEL4 and an updated
iLO firmware, you need to disable power management for the machine due to a
change in the way the iLO powers off the machine. It seems to try a nice
shutdown by sending the machine into runlevel 6 instead of just pulling the
carpet out from under it.

My suggestion to the fencing agent coders would be to issue a "power reset"
instead of a
"power off" as a reset will in fact pull the plug, and is much faster (and
thereby "safer") than a power off command.


Also, you can always add more than one fencing method to each node. For
instace, you can
fence the machine at the fibre port as well. I believe you need to manually
enable the port
again once you have determined that there is no problem etc.


Any specific problem you are having?



Corey

-----Original Message-----
From: linux-cluster-bounces at redhat.com
[mailto:linux-cluster-bounces at redhat.com] On Behalf Of Cosimo Streppone
Sent: Wednesday, May 03, 2006 6:53 AM
To: linux clustering
Subject: Re: [Linux-cluster] Recommended HP servers for cluster suite

Steve Nelson wrote:

> On 5/3/06, carlopmart <carlopmart at gmail.com> wrote:
> 
>> And what about Porliant DL 380??
> 
> I use dl380s for low-end, dl580s and now 585s for upper-end clusters. 
> Very very happy with them.

Do you use iLO port for fencing?
Please can you explain your iLO configuration?
I have some doubts on how to configure fencing.

Example:
you have nodes A,B and iLO devices Ai, Bi Fencing device for node A should
be
Ai or Bi?

I had also troubles on installation of additional perl modules required to
make fence_ilo agent work:
despite having IO::Socket::SSL and Net::SSL::something correctly installed,
it keeps throwing error messages and I can't seem to correctly startup
fenced.

--
Cosimo

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