Solaris: Shutting down one system generates messages on all systems: Why/how to turn off?

by **gazelle** » Thu, 23 Oct 2003 01:23:38 GMT

Solaris: Shutting down one system generates messages on all
systems: Why/how to turn off?

When one machine in our network executes the shutdown command, messages are
displayed on all the machines saying the machine is about to be rebooted
(which is not true on those other machines).  I'm guessing that this is
caused by the fact that the other machines have NFS-mounted drives on the
machine that is going down.

Is this right?  And, is there a way to turn this "feature" off?

by **Darren Dunham** » Thu, 23 Oct 2003 01:55:18 GMT





Take a look at the man page for 'rmtab'.

-- 
Darren Dunham                                            XXXX@XXXXX.COM 
Unix System Administrator                    Taos - The SysAdmin Company
Got some Dr Pepper?                           San Francisco, CA bay area
         < This line left intentionally blank to confuse you. >

by **gazelle** » Thu, 23 Oct 2003 04:06:15 GMT

In article <Wxdlb.1628$ XXXX@XXXXX.COM >,





OK, and then?

I get the idea of the rmtab file, but there doesn't seem to be much you can
do with it.  And, I don't see how it relates to the instant problem - unless
what you are saying is that removing (or commenting out) lines in this file
will inhibit the sending of the inter-system broadcast message.

by **Barry Margolin** » Thu, 23 Oct 2003 04:19:57 GMT

In article <bn40f0$6c9$ XXXX@XXXXX.COM >,






Yes it will.  That's how the NFS server knows which clients have mounted
its filesystems, and therefore need to be warned about the impending
shutdown.

-- 
Barry Margolin,  XXXX@XXXXX.COM 
Level(3), Woburn, MA
*** DON'T SEND TECHNICAL QUESTIONS DIRECTLY TO ME, post them to newsgroups.
Please DON'T copy followups to me -- I'll assume it wasn't posted to the group.

by **Oscar del Rio** » Thu, 23 Oct 2003 04:37:28 GMT



Disable walld in /etc/inetd.conf on all the machines, or
edit /usr/sbin/shutdown (a shell script) and comment out
the "rwall" line.

by **Darren Dunham** » Thu, 23 Oct 2003 04:49:04 GMT






Well, that's the background for what's happening.  I don't know exactly
what part of shutdown reads that file to send out messages, so I'm not
certain how it can be bypassed.


You can certainly do that.  If I were very {*filter*}about it, I might save a
copy and and put it back before starting up mountd on the reboot.  If
you don't do that, I can't think of anything that would break, though.
The output of 'showmount' would be inaccurate of course.

-- 
Darren Dunham                                            XXXX@XXXXX.COM 
Unix System Administrator                    Taos - The SysAdmin Company
Got some Dr Pepper?                           San Francisco, CA bay area
         < This line left intentionally blank to confuse you. >

by **gazelle** » Thu, 23 Oct 2003 04:57:26 GMT

In article <xFflb.144$ XXXX@XXXXX.COM >,


...

OK - this sounds like a workable workaround.  I can hack together a script
to comment out all the rmtab entries and add that to the shutdown script.

But, for the sake of clarity, is there not a more direct/cleaner solution?

P.S.  I can see the logic behind this feature, but in a production
environment (with clerical level users), it is an annoyance.

by **Logan Shaw** » Thu, 23 Oct 2003 05:04:14 GMT






Or just run "init 6" instead of "shutdown -i6", etc.  "init 6"
is pretty much the same thing as "shutdown -i6 -g0 -y", except
for the notifications and the fact that it creates /etc/nologin.
(But the window of time that /etc/nologin exists is short.)

   - Logan

by **gazelle** » Thu, 23 Oct 2003 05:06:33 GMT

In article < XXXX@XXXXX.COM >,





Bingo!  I have to admit it never occurred to me that "shutdown" would be
implemented as a shell script.

It looks like all you have to do is comment out this one single line:

	remotes=`/usr/sbin/showmount`

by **Darren Dunham** » Thu, 23 Oct 2003 05:06:33 GMT






Heh.. That explains it.  I was looking through all the shutdown
processes and not at shutdown itself.

-- 
Darren Dunham                                            XXXX@XXXXX.COM 
Unix System Administrator                    Taos - The SysAdmin Company
Got some Dr Pepper?                           San Francisco, CA bay area
         < This line left intentionally blank to confuse you. >

Solaris: Shutting down one system generates messages on all systems: Why/how to turn off?

Solaris: Shutting down one system generates messages on all systems: Why/how to turn off?

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