Re: [SSI-users] Shutting down cluster hangs master and panics node when trying to stop NIS
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Re: [SSI-users] Shutting down cluster hangs master and panics node when trying to stop NIS
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From: Keerthi B. K N <kbh...@in...> - 2003-10-29 12:34:32
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Hi,
I tried NIS on my openSSI cluster, as below, and things are working. I
couldn't see the panic that you mentioned when I logged out all sessions
and restarted the cluster. As you have mentioned, I suspect the NIS
installation on your cluster.
My configuration:
On master (root) node: ypserv, rpc.yppasswd, ypxferd and ypbind (it is
also a slave node)
On other nodes: ypbind
The results:
1. No panic as reported.
2. yp* commands work fine on both the master and the slave node
3. yppasswd for root (via command, yppasswd root) doesn't work, the
error being
unknown user (uid=0). I need to investigate this further - I suspect
that I have missed something here.
P.S: I have bound ypbind daemons to the server running on the master
node using ypset command.
regards
Keerthi Bhushan
------------------------------------------------------------------------
Subject:
[SSI-users] Shutting down cluster hangs master and panics node when
trying to stop NIS
From:
"Robert Verstandig" <Rob...@ge...>
Date:
Fri, 24 Oct 2003 10:51:26 +0800
To:
<ssi...@li...>
Hi People
I have just installed Redhat Linux 9 with OpenSSI 0.9.95 on a couple of
older machines for some testing. I have a master node and a second
machine booting via tftp as a second node.
The install went ok although there were a few differences from the
published doco. For example, in the /etc/grub config file I had to
remove the '/boot' from the OpenSSI stanza as tftp seems to map directly
to this directory from the node. Also, I had to disable the firewall.
Opening the port 69 did not appear to work. I'll check that out a bit
later on.
The problem I am having at the moment is to do with NIS. I didn't
install this prior to installing the OpenSSI software and had to
configure it after the cluster was built. I ended up doing this by
loading the original kernel, configuring NIS and then creating a new RAM
Disk Image. Probably not the correct way to do this but I didn't manage
to find any doco on this and as you can probably tell, my Linux is not
that great... Anyway, this seems to work fine ie I can see the nis maps
via ypcat and can log on to the clusters using the NIS username/password
(home directories are not mapped correctly as they are NFS mounted from
a solaris server - another story...) Telnet and XTerm sessions appear to
work correctly however, after I log out all sessions and attempt to
restart the cluster the master node hangs (not further keyboard
response) 'Shutting down NIS services' and the node I have configured
kernel panics:
Instruction(i) breakpoint #0 at 0xc01249f0 (adjusted)
0xc01249f0 panic: int3
Entering kdb (current=0xd1580000, pid 131138) on processor 0 due to
Breakpoint @ 0xc01249f0
[0]kdb>
I assume at this point I am in the linux kernel debugger. Any character
I type here is repeated 20 (yes 20) times so it is not very useful.
To get out of this I have to power down both the master and node
machines and restart. I am not sure whether this problem is because I
have installed NIS incorrectly or there is a bug somewhere. I couldn't
find anything in the newsgroups
How should a service like NIS be added to the cluster after the fact?
Does a new image have to be generated? I wouldn't have though so but I'm
not sure.
Are there any steps I should take to try and fix this or should I just
reinstall the master node adding NIS *before* installing OpenSSI.
Apologies for what might seem like a load of dumb questions.
Regards
Robert
________________________________________________________________________________*
Mr Robert Verstandig
*Senior Systems Engineer
Department of Exploration Geophysics
Curtin University of Technology GPO Box U1987 Perth Western
Australia 6845
[ARRC/CSIRO Building H Block Level 4 26 Dick Perry Avenue
Kensington WA 6151]
*Tel*: (+61 8) 9266 4975 *Fax*: (+61 8) 9266 3407
*Email*: /rob...@ge...
<mailto:rob...@ge...>/
*Web Page*: _http://www.geophysics.curtin.edu.au_
<http://www.geophysics.curtin.edu.au/>/
'CRICOS Provider Code: 00301J'/
________________________________________________________________________________
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