Re: Automount 5 LDAP filtering question

[Victor Danilchenko <danilche@cs.umass.edu>]

Jim Carter wrote:
> On Fri, 23 Mar 2007, Victor Danilchenko wrote:
> 
>> 	The problem is this. We have individual systems indirectly automounting 
>> each other. As such, it is useful for them to be able to keep both the 
>> automounted and the local mountpoints in the same tree, for performance 
>> reasons (rather than mount self over NFS from the /exports/myhost 
>> directory into the /nfs/myhost directory, for example). With automount 
> 
> Which operating system is this?  We're running Linux (with autofs-4), and 
> autofs is smart enough to recognize and do a bind mount of local 
> filesystems, so there is no overhead.

	Interesting. I didn't know that. I am sure it's the same way on Fedora 
and RHEL. I hope someone will offer a way to customize the LDAP filter, 
but if it's not possible, we will go with your idea, thanks.

	Thanks a bunch.

> We don't do anything special; 
> however, the local filesystems are in one place (/h[1-9], /m[1-9]) while 
> the automounted references are elsewhere (/net/$HOSTNAME).   Here's an
> excerpt from /etc/mtab on a typical host, Sunset:
> 
> /dev/sdb2 /m1 ext3 rw,acl,user_xattr,quota 0 0
> automount(pid4220) /net autofs rw,fd=4,pgrp=4220,minproto=2,maxproto=4 0 0
> automount(pid4094) /net/sunset autofs rw,fd=4,pgrp=4220...
> /m1 /net/sunset/m1 none rw,bind 0 0                  <== Bind mount here
> automount(pid21051) /net/julia autofs rw,fd=4,pgrp=4220...
> julia:/h1 /net/julia/h1 nfs rw,,addr=128.97.4.5...   <== NFS mount here
> 
> So at least on Linux you don't need to exclude local filesystems from the 
> automount map.  I believe Solaris also has this situation covered but I 
> can't remember just what it does. 
> 
> James F. Carter          Voice 310 825 2897    FAX 310 206 6673
> UCLA-Mathnet;  6115 MSA; 405 Hilgard Ave.; Los Angeles, CA, USA  90095-1555
> Email: jimc@math.ucla.edu    http://www.math.ucla.edu/~jimc (q.v. for PGP key)


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