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Re: NFS mounting with cfengine


From: Doug Chapman
Subject: Re: NFS mounting with cfengine
Date: Mon, 8 Aug 2005 20:47:22 -0700

Highly recommend using automount.  You get the advantage of timing out
inactive mount points and if you use wildcards you may not have to
update this file very often.

Here's a sample of what we're doing (you'll need to also add a row to
/etc/auto.master)

editfiles:
linux::
    { /etc/auto.remote
        BeginGroupIfNoLineMatching '#auto.remote managed by cfengine v 1.9'
         Backup "off"
         EmptyEntireFilePlease
         Append '#auto.remote managed by cfengine v 1.9'
         Append '*       -rw,timeo=600,hard,intr,bg  nas01:/vol/&'
        EndGroup    
        DefineClasses "reloadautofs"
     }
     
shellcommands:
last.reloadautofs::
     "/sbin/service autofs reload"


On 8/8/05, Frank Smith <address@hidden> wrote:
> --On Monday, August 08, 2005 13:00:19 -0400 Jeremy Dreese <address@hidden> 
> wrote:
> 
> >
> >> So the question is should I simply do that with a static entry in fstab
> >> and forget about using cfengine for the mounting itself? Or do I really
> >> missunderstand the concept of NFS mounts with cfengine?
> >
> > You can use "miscmounts" to mount these directories.  I think something
> > like this should work:
> >
> > miscmounts:
> >
> >     SystemGroup::
> >
> >         blender:/vol/apps /usr/appdir mode=tcp
> 
> Be aware that cfengine's mount code isn't very bright.  It generates
> a line for the [v]fstab based on some defauults and the options
> you specify, and if it isn't already there it will add it to the file
> and try to mount it.  Sounds good in theory, but it checks for an
> exact match in the file and doesn't check to see if it is already
> mounted, so you can easily end up with double mounts. even if it is
> only a difference in whitespace.  This can cause problems on some
> systems.
>   Also, even if you use cfengine for the initial mount (i.e., aren't
> trying to convert existing manual mounts to cfengine control), you
> can't modify the mounts or the mount options, since there is no
> practical way to unmount or remount a filesystem.  You can't even
> make the fstab changes and wait for the next reboot, since cfengine
> will try to mount everything in it every time it runs.
> 
> Frank
> 
> >
> >
> > --
> > Jeremy Dreese
> > Engineering Computing Systems Integrator
> > College of Engineering
> > Bucknell University
> > voice: (570) 577-3714
> > fax: (570) 577-3579
> > email: address@hidden
> >
> 
> --
> Frank Smith                                      address@hidden
> Sr. Systems Administrator                       Voice: 512-374-4673
> Hoover's Online                                   Fax: 512-374-4501
> 
> 
> 
> _______________________________________________
> Help-cfengine mailing list
> address@hidden
> http://lists.gnu.org/mailman/listinfo/help-cfengine
> 


-- 
Doug Chapman
Revenue Science




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