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From: Carl Karsten <carl@nextdayvideo.com>
To: overlayfs <linux-unionfs@vger.kernel.org>
Subject: nfs server serving ... wrong mount?
Date: Wed, 20 Oct 2021 16:50:32 -0500	[thread overview]
Message-ID: <CADmzSSjy+bzPUus3xO2zT_USEKZYJ7WBOCbOiF+ro3EDoipXqg@mail.gmail.com> (raw)

I have 2 overlayfs monts.

I can nfs export one or the other fine, but not both at the same time,
the client gets the wrong files.

server hosthame negk bullseye ext4
client twist ubuntu

juser@negk:~$ cat /etc/exports
# /srv/nfs/rpi/buster/boot/merged *(ro,sync,no_subtree_check,no_root_squash)
/srv/nfs/rpi/buster/root/merged *(ro,sync,no_subtree_check,no_root_squash)

juser@negk:~$ ls /srv/nfs/rpi/buster/boot/merged
bcm2708-rpi-b.dtb       bcm2710-rpi-3-b-plus.dtb  fixup4cd.dat
kernel7.img       start4.elf
(snip)

juser@negk:~$ ls /srv/nfs/rpi/buster/root/merged
bin  boot  dev  etc  home  lib  lost+found  media  mnt  opt  proc
root  run  sbin  srv  sys  tmp  usr  var

carl@twist:~/mnt$ sudo mount -t nfs negk:/srv/nfs/rpi/buster/root/merged nfs
carl@twist:~/mnt$ ls nfs
bin  boot  dev  etc  home  lib  lost+found  media  mnt  opt  proc
root  run  sbin  srv  sys  tmp  usr  var
carl@twist:~/mnt$ sudo umount nfs

# enable root in negk exports...

carl@twist:~/mnt$ sudo mount -t nfs negk:/srv/nfs/rpi/buster/root/merged nfs
carl@twist:~/mnt$ ls nfs
bcm2708-rpi-b.dtb       bcm2710-rpi-3-b-plus.dtb  fixup4cd.dat
kernel7.img       start4.elf
(snip)


juser@negk:~$ cat /etc/fstab
# /etc/fstab: static file system information.

/dev/mapper/negk--vg-root /               ext4    errors=remount-ro 0       1
UUID=c031c4a4-3eda-4fb9-99ac-ce2cb9d05243 /boot           ext2
defaults        0       2
/dev/mapper/negk--vg-swap_1 none            swap    sw              0       0

# rpi netboot boot: base, setup, updates = merged
overlay   /srv/nfs/rpi/buster/boot/merged    overlay
noauto,defaults,lowerdir=/srv/nfs/rpi/buster/boot/setup:/srv/nfs/rpi/buster/boot/base,upperdir=/srv/nfs/rpi/buster/boot/updates,workdir=/srv/nfs/rpi/buster/boot/work,nfs_export=on
   0   2

# rpi netboot root: base, setup, updates = merged
overlay   /srv/nfs/rpi/buster/root/merged    overlay
noauto,defaults,lowerdir=/srv/nfs/rpi/buster/root/setup:/srv/nfs/rpi/buster/root/base,upperdir=/srv/nfs/rpi/buster/root/updates,workdir=/srv/nfs/rpi/buster/root/work,nfs_export=on
  0   2

server setup: https://github.com/CarlFK/pici/blob/main/setup2.sh

-- 
Carl K

             reply	other threads:[~2021-10-20 21:51 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-20 21:50 Carl Karsten [this message]
2021-10-21  7:09 ` nfs server serving ... wrong mount? Amir Goldstein
2021-10-21  8:10   ` Carl Karsten

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