Karl Kopper wrote:
-----Original Message-----
From: Brent N. Chun [mailto:[EMAIL PROTECTED]
When we do this on node 1 everything works as expected:
On host unfiwcl1 --
unfiwcl1:/# echo $GEXEC_SVRS
unfiwcl1 unfiwcl2 unfiwcl3 unfiwcl4
unfiwcl1:/# gexec -n 0 hostname
1 unfiwcl2
0 unfiwcl1
2 unfiwcl3
3 unfiwcl4
However, when I run the same command on node 3 it doesn't work
the same way:
On host unfiwcl3 --
unfiwcl3:/# echo $GEXEC_SVRS
unfiwcl1 unfiwcl2 unfiwcl3 unfiwcl4
unfiwcl3:/# gexec -n 0 hostname
1 unfiwcl2
0 unfiwcl1 <-- Gexec node 0 is cluster node "1"
3 unfiwcl4
2 unfiwcl1 <-- Gexec node 2 _should_ be "3" (the localhost)
Have you tried checking /etc/hosts on unfiwcl3?
Since GEXEC_SVRS is set, the n nodes that get picked are simply the
first n hostnames/IPs defined in GEXEC_SVRS. There's no need for
localhost to be first in the list.
bnc
Hi Brent,
Thanks for your reply.
We use NIS. Here is the config followed by a ping example.
(Same config as on the node that works as far as I can tell). This is Red
Hat 7.3.
unfiwcl3:/# cat /etc/hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 unfiwcl3 localhost.localdomain localhost
Here's how nsswitch.conf is configured:
unfiwcl3:/# cat /etc/nsswitch.conf | grep hosts
hosts: files nis dns
Well, this tells you why unfiwcl3 is resolving to loopback. I haven't been
paying as much attention to this thread (or gexec in general *shifts
uneasily*) as is probably necessary to understand the relevance of all
this, though.
But when nsswitch says to use /etc/hosts first, then NIS, then DNS for a
query... it's no wonder you're getting a hit from /etc/hosts and not
querying NIS at all.
Two "fixes" for this (either solution may affect other processes which rely
on name resolution in unforeseen ways, proceed carefully):
* Remove "files" from or rearrange the order of the hosts: line in
/etc/nsswitch.conf.
* Remove "unfiwcl3" from /etc/hosts.
I never tell people how to manage their own affairs but I can tell you that
I've got access to a Redhat 7.2 box here that's operating as a trouble-free
NIS client without having its regular hostname in /etc/hosts pointing to
loopback. 127.0.0.1 points only to localhost and localhost.localdomain.
Good luck...
