Date: Thu, 26 Apr 2001 16:38:56 +0200 From: Sven Huster <sven.huster@mailsurf.com> To: Brian Dean <bsd@bsdhome.com> Cc: freebsd-stable@FreeBSD.ORG Subject: Re: diskless startup again Message-ID: <5.1.0.14.0.20010426162542.02e1bec0@mx01.mailsurf.com> In-Reply-To: <20010425225249.B54548@vger.bsdhome.com> References: <5.1.0.14.0.20010425105221.02657d00@mx01.mailsurf.com> <5.1.0.14.0.20010425105221.02657d00@mx01.mailsurf.com>
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At 04:52 AM 4/26/01, Brian Dean wrote:
>*This message was transferred with a trial version of CommuniGate(tm) Pro*
>On Wed, Apr 25, 2001 at 11:00:04AM +0200, Sven Huster wrote:
>
> > Hi there,
> >
> > 1.
> > maybe it is after the release of FreeBSD-4.3 possible to think about the
> > remaining mount_null in /etc/rc.diskless* again.
> >
> > the two solutions i see are:
> > - seperate mount_mfs for /tmp
> > - symlink /tmp to /var/tmp by default in the scripts
>
>Well, minimally it should work out of the box in a standard FS layout.
>The way it is, it doesn't, one has to make /tmp a symlink to somewhere
>writable.
>
>Perhaps, by default, a check to see if /tmp is a symlink, and if not,
>keep it mounted within rc.diskless1 (or remount it within
>rc.diskless2) as an MFS. But if /tmp is a symlink, then we would just
>assume that it points to somewhere writable. Something like this
>should suffice:
>
> if [ ! -h /tmp -o -n "$diskless_tmpmfs_size" ]; then
> if [ -z "$diskless_tmpmfs_size" ]; then
> diskless_tmpmfs_size=20480 # default size
> fi
> mount_mfs -s $diskless_tmpmfs_size -T qp120at dummy /tmp
> fi
>
>That way, two simple cases are provide for in the default
>configuration, /tmp could be symlinked to /var/tmp which is in a
>memory filesystem, or /tmp could be it's own, custom-sized memory
>filesystem. If you need something different than that, well, that's
>what the diskless_mount hook (default to rc.diskless2) is provided to
>cover.
I think thats a quite good solution. works with "normal" setup, /tmp own
dir and with customized symlink.
also the diskless_tmpmfs_size var i like but shouldnt
${diskless_tmpmfs_size:=20480} also work?
> > 2.
> > Another thing is that i want to run different local daemons
> > depending on the machines (ip's or hostnames), or machine groups So
> > what i thought is to add the same function as for /etc to
> > /usr/local/etc, maybe which the enhancement of grouping machines in
> > a config file. This might be also useful for global config of
> > "normal" machines, which then can be mirrored to all of them.
>
>This is probably not such a good idea. If you need to do anything
>special, you should initialize "diskless_mount" to point to your
>supplied replacement for rc.diskless2. Everyone will want to do
>things a little differently, which is why there is already an option
>to change the default behaviour and supply your own custom script.
>You could easily set up /usr/local/etc as an MFS at this point in the
>boot and achieve what you want, just use rc.diskless2 as a starting
>point and expand on it to meet your needs.
ok, i did get the thing with diskless_mount, now ok.
but diskless_mount is set in rc.diskless1, i think, and so not changeable
in std config files (like rc.conf, but this will be copied in rc.diskless1)
so i am not sure what to do.
regards
Sven Huster
Senior IT Systems Administrator
*BSD, Linux, Solaris
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