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
