OverlayFS on DietPi with LXDE Topic is solved

[Cas]

Hi everyone,

I looking for a tutorial (or something similar) which could help me to install a OverlayFS on a DietPi with LXDE.
Do you have any suggestions? For Raspbian I found someone, but no DietPi-specific.

I try to get a ReadOnly-DietPi (on Raspberry Pi 3B+) with a Desktop. Until now, I try it with a separate RW-Partition, but this don‘t fit for the job.

Thank you in advance
- Cas

[Joulinar]

Many thanks for your report. Maybe you can have a look to following post.

viewtopic.php?p=24920#p24920

[Cas]

Unfortunaly, this solution isn‘t working for me. The Bash-Prompt changed to „(ro)“, but my changes taking place and I don‘t see the Overlay mounted.

The "install.sh" run trough without any error or warning. But No overlay-fs was mounted. Is there anything other to d then you write in the linked answer?

[Joulinar]

did you copied the code lines from GitHub into /root/.bashrc ??

For my system, this is working well

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root@DietPi3:~# df -h
Filesystem      Size  Used Avail Use% Mounted on
udev            433M     0  433M   0% /dev
tmpfs            94M  1.7M   93M   2% /run
overlay         470M   88K  470M   1% /
tmpfs           470M   88K  470M   1% /overlay
/dev/mmcblk0p2   29G  1.5G   27G   6% /overlay/lower
tmpfs           470M     0  470M   0% /dev/shm
tmpfs           5.0M  4.0K  5.0M   1% /run/lock
tmpfs           470M     0  470M   0% /sys/fs/cgroup
tmpfs           2.0G  8.0K  2.0G   1% /tmp
tmpfs            50M   32K   50M   1% /var/log
/dev/mmcblk0p1  253M   64M  189M  26% /boot
tmpfs            94M     0   94M   0% /run/user/0
root@DietPi3:~#

[Cas]

I analyze the problem;

the init-bottom-overlay throw a error (hides by default) in line 16 (. /scripts/functions) because this folder isn't existing.

Through this, no /overlay tree is created.

So, I'm stuck here. Do you have any idea where the /scripts/functions folder should be created?


Regarding to your question, the /root/.bashrc PS1-Setting is only alternating the "name" displayed in the bash, so this has in the end no effect to the system.

[Joulinar]

there you go

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root@DietPi3:~# ls -ls /usr/share/initramfs-tools/scripts
total 36
12 -rw-r--r-- 1 root root 9828 Aug 23  2019 functions
 4 drwxr-xr-x 2 root root 4096 Jun 23 23:24 init-bottom
 4 drwxr-xr-x 2 root root 4096 Aug  4 23:51 init-top
 8 -rw-r--r-- 1 root root 5679 Feb  6  2019 local
 4 drwxr-xr-x 2 root root 4096 Aug  4 23:51 local-premount
 4 -rw-r--r-- 1 root root 3093 Feb  6  2019 nfs
root@DietPi3:~#

should be created during

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apt install initramfs-tools

[Cas]

Ok, very much thanks so far.
I change the Line to this specific tree.
Now the scirpt tries to mount the overlay-folders (they where created), but the mount-command throws a warning, that the overlay-folders are not specified in the /etc/fstab (thats the point where the partitions hook to some tree).

Do you know where the fstab should be written or could post me the containing of your file here?

[Joulinar]

are you sure your install.sh was executed correctly? because you are missing all the steps done on the script like copy new hooks-overlay and init-bottom-overlay in place

hooks-overlay should contain the correct path to scripts/functions
https://github.com/chesty/overlayroot/b ... overlay#L3

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. /usr/share/initramfs-tools/scripts/functions
. /usr/share/initramfs-tools/hook-functions

and init-bottom-overlay should do mounting as well as changing /etc/fstab
https://github.com/chesty/overlayroot/b ... verlay#L62

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mount -n -o move ${rootmnt} /overlay/lower
mount -t overlay overlay -olowerdir=/overlay/lower,upperdir=/overlay/upper,workdir=/overlay/work ${rootmnt}

mkdir -p ${rootmnt}/overlay
mount -n -o rbind /overlay ${rootmnt}/overlay

# fix up fstab
cp ${rootmnt}/etc/fstab ${rootmnt}/etc/fstab.orig
awk '$2 != "/" {print $0}' ${rootmnt}/etc/fstab.orig > ${rootmnt}/etc/fstab
awk '$2 == "'${rootmnt}'" { $2 = "/" ; print $0}' /etc/mtab >> ${rootmnt}/etc/fstab

[Cas]

I'm not sure about this, but like I write above, I don't get any error massage.

But, I can see, there is only deleting changes to my fstab-file... So I don't think that the install.sh-script was executed correctly.

Last Message is that busybody was installed...

When I execute init-bottom-overlay directly (and adjust the path), I got the error-message before on the mount-commands. The fstab is rewritten (oder better: the line should be added) afterwards.

When I try the awk-command, nothing happens.

[Joulinar]

hi,

the install script is not doing any changes on /etc/fstab.
install.sh is just going to copy hooks-overlay as well as init-bottom-overlay in place.

https://github.com/chesty/overlayroot/b ... install.sh

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cp hooks-overlay /etc/initramfs-tools/hooks/
cp init-bottom-overlay /etc/initramfs-tools/scripts/init-bottom/

So you need to check if the new files are copied correctly

Next to this some settings are done on

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/boot/config.txt

It might be better to contact the maintainer of overlayroot if you have issues with running it. I installed it 3 times without issues now.