[mythtv-users] Problems with netboot on Fedora Core 6, Kernel 2.6.20
Jon
jon at sd-6.org
Sun Apr 15 18:32:05 UTC 2007
Jeff Coffler wrote:
> Hi folks,
>
> I thought I'd post here before trying to find some relevant
> Fedora-specific mailing lists.
>
> I successfully have a Myth frontend doing a diskless netboot on kernel
> 2.6.19-1.2911. The MythTV wiki pages (in particular, page:
>
>
> http://www.mythtv.org/wiki/index.php/Diskless_Frontend#Redhat_and_Fedora_Core
>
> was instrumental in getting this working. I've been netbooting
> successfully for months.
>
> Well, I'm now trying to get kernel 2.6.20 to fly with netboot, and I'm
> having a heck of a time. I've tried two kernels: 2.6.20-1.2933 and
> 2.6.20-1.2944. Problems are identical with both of those.
>
> The problem: The disklessrc boot script isn't properly mounting the
> snapshot file system (near as I can tell).
>
> I've added some debugging / diagnostics to the script, and I believe I
> understand the problem better, but not how to solve it.
>
> The first problem: the /.snapshot file system appears to not be mounted
> (the wiki discussed it getting mounted RO, but I think it's not being
> mounted at all). The "normal" mount in the disklessrc fails:
>
> mount -t nfs $NFS_IP:${NFS_DIR}/snapshot /.snapshot -o rw,nolock
>
> This fails because the / file system is mounted read-only, and I can't
> write to the mtab file. So, I added a -n to the mount statement.
>
> Near as I can tell, the mount is ignored. If, after doing the mount
> with a -n, I do a "df" (in disklessrc - the system isn't "up" yet), the
> /.snapshot file system is not listed.
>
> If I remount the file system as per the wiki:
>
> mount -o remount,rw /.snapshot
>
> This appears to fail as well (it complains that /.snapshot isn't in the
> /etc/fstab or /etc/mtab files; I tried adding to /etc/fstab, but I don't
> believe that file is looked at this early in the boot sequence).
>
> Bottom line: The /.snapshot area is NOT mounted properly, and I can't
> get the system to come up.
>
> If I export the root file system on the server as RW rather than RO,
> then the system comes up fine. But having a separate root area per
> client is sort of pointless from an ease-of-maintenance perspective.
> I'd really like to get the snapshots working again.
>
> I've googled, but not found anything relevant.
>
> Anybody have any ideas?
>
> Thanks!
>
> -- Jeff
I would remove mtab and create a link to /proc/mounts
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