topic Re: fence_ilo in Operating System - Linux

fence_ilo

speccenini — Wed, 16 Mar 2011 13:59:47 GMT

Hi,

i have a redhat cluster that use fence_ilo as fencing device.

But if i execute:
fence_ilo -a hostname-ilo -l username -p password -o status
it have the following
Unable to connect/login to fencing device

when i execute:
ssh hostname-ilo
i get the ILO console.

any ideas?

thx in advance,
Stefano Peccenini

Re: fence_ilo

Matti_Kurkela — Wed, 16 Mar 2011 14:30:34 GMT

fence_ilo does not use SSH. "man fence_ilo" says it opens a SSL connection to port 443 of the iLO console, and then communicates with iLO using an XML datastream.

Test with:
telnet hostname-ilo 443

or:
lynx -dump -head https://hostname-ilo/
(if you have a version of lynx that supports https)

MK

Re: fence_ilo

speccenini — Wed, 16 Mar 2011 14:47:01 GMT

Hi,

i tried to login via telnet on 443 port.

[root@spisap02 SSHKEY]# telnet hostname-ilo 443
Trying xx.xx.xx.xx...
Connected to spisap02-ilo.sisal.it (xx.xx.xx.xx).
Escape character is '^]'.

So ILO support the login, i don't know why fence_ilo fail the login.

Re: fence_ilo

Matti_Kurkela — Thu, 04 Aug 2011 17:51:43 GMT

The network connection works, but logging in using https is still not proven (or you haven't said so).

Try connecting with a web browser to https://hostname-ilo and log in using the username and password used with fence_ilo. Does it work?

What's your hardware model, iLO firmware version and RedHat version?
If you have one of the latest server models and an old version of RHEL, the fence_ilo version might be too old to support your hardware.

In this thread, Reiner Rottmann offers a link to an alternate iLO fencing agent:
http://h30499.www3.hp.com/t5/System-Administration/fence-ilo-repace/m-p/4756390#M43700

Might be worth a try.

MK

Re: fence_ilo

speccenini — Thu, 17 Mar 2011 07:01:55 GMT

Hi, thanx for reply.

os version:
Linux 2.6.18-164.el5 #1 SMP Tue Aug 18 15:51:48 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux
Red Hat Enterprise Linux Server release 5.4 (Tikanga)

ILO version:
iLO 3 Firmware Jul 26 2010 1.10

I also tried to log in through web browser in https mode, and it worked fine.

thanx a lot,
Stefano Peccenini

Re: fence_ilo

speccenini — Thu, 17 Mar 2011 07:02:58 GMT

i forgot the cman version:
cman-2.0.115-34.el5_5.4

Re: fence_ilo

Alzhy — Thu, 17 Mar 2011 12:21:17 GMT

What Proliant model?

I have DL380 G6's and running RHEL 5.5 with the same version of RHCS bits you have and fence_ilo works beautifully.

Re: fence_ilo

robert1984 — Thu, 17 Mar 2011 16:45:43 GMT

Please, run fence_ilo with '-v' and '-D /tmp/outfile.txt'. Maybe it will show something interesting. Or even use tcpdump to analyze IP traffic.

Re: fence_ilo

Alzhy — Thu, 17 Mar 2011 16:49:13 GMT

were you able to fence your iLo device from your node(s)?

do you have IPTABLES set up?

As a quick test, do "service iptables stop"
Then try fence_ilo once more.

It it works -- then it is likely you need to rework your IPTABLES...

cheers.

Re: fence_ilo

Steven E. Protter — Thu, 17 Mar 2011 19:40:32 GMT

Shalom,

Advice:
1) Configure the ilo card so it uses ssh and has a valid userid/password combination.
2) Update the firmware on the ilo console to reach a supported version that HP support says it will work.
3) As noted elsewhere in the case, make sure the firewall is not hammering it. Confirm network connectivity.

SEP

Re: fence_ilo

Alzhy — Thu, 17 Mar 2011 19:50:17 GMT

Huh?

Re: fence_ilo

speccenini — Fri, 18 Mar 2011 11:09:57 GMT

hi all,
iptables is turned off, but fence_ilo still does not work, this afternoon i will upgrade the formware of the ILO.
ssh connection, https connection are enabled and works fine, via web browser or via ssh shell connection.
The model is ProLiant BL465c G7

I will tell you if it works after upgrade

thanx a lot,
Stefano Peccenini

Re: fence_ilo

speccenini — Fri, 18 Mar 2011 17:06:05 GMT

I found the solution.

hp writes in this document:
http://h10025.www1.hp.com/ewfrf/wc/document?cc=uk&lc=en&dlc=en&docname=c02509477

and RedHat writes in this other documents:
http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5/html/5.6_Technical_Notes/cman.html

So, command fence_ilo is not supported by ILO3, you have to use fence_ipmilan. As RedHat specified in that document:
https://bugzilla.redhat.com/show_bug.cgi?id=642700
the version of cman must be greater than: cman-2.0.115-34.el5_5.4.

Moreover, in that other document redhat, linked in the HP document to work you must select a lanplus at 1:
https://access.redhat.com/kb/docs/DOC-39336

then from the command line:
# fence_ipmilan -a hostname-ilo -l myuser -p mypass -o status -P 1
Getting status of IPMI: hostname-ilo ... power = On Chassis

finally it works;

this is an acceptable solution?

Stefano Peccenini