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TOLDOTECHNIK / buildroot-webkit

Buildroot WebKit fullscreen browser for Raspberry Pi. Suitable for HTML 5 user interfaces or digital signage / kiosk installations. It also can be used as a fullscreen video loop player. Ready to use RPi Zero/W and RPi 3 B SD card images are available.
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Read-only filesystem for RPi3? #53

Closed salopeknet closed 1 year ago

salopeknet commented 1 year ago

Hello guys,

thank you very much for this great project!!

I have used your prebuilt image for RPi3 (https://dev.toldotechnik.li/download/sdcardRPi3.img.zip) from 2019-06-24 on an RPi3 A+, everything seems to work fine.

But it seems, the filesystem is NOT read-only, can you check that please?

I stumbeled over https://github.com/TOLDOTECHNIK/buildroot-webkit/issues/18 There you provided a new prebuilt image for Pi Zero one day before the issue got closed.

Is it possible (if I look at the dates of the prebuilt images), that you forgot to apply the same fix like in #18 for RPi3?

Here is my fstab output: `root@rpi3:~ # cat /etc/fstab

/dev/root / ext2 rw,noauto 0 1 proc /proc proc defaults 0 0 devpts /dev/pts devpts defaults,gid=5,mode=620 0 0 tmpfs /dev/shm tmpfs mode=0777 0 0 tmpfs /tmp tmpfs mode=1777 0 0 tmpfs /run tmpfs mode=0755,nosuid,nodev 0 0 sysfs /sys sysfs defaults 0 0 /dev/mmcblk0p1 /boot vfat defaults 0 0 ` Can you have a look at this, please?

By the way: Is it possible to provide an additional prebuilt image configured for RPi 3A+ (only 512MB RAM, no LAN)?

For the moment, the RPI3 B+ image seems to work well, but I don't know, what happens if the read-only mode gets activated due to the half amount of RAM?

I have another wish/idea/question: Would it be possible to set an individual hostname (for network AND mDNS/Avahi) somehow via config.txt? I would need three RPis in the same network with different content, so I can identify/access them via mDNS.

Thanks in advance, Micha

TOLDOTECHNIK commented 1 year ago

By default we only provide R/W images. You can modify /etc/fstab so the /dev/root gets mounted read only.

For to have some other network names you simply have to change it in the /etc/hostname file.

salopeknet commented 1 year ago

Thank you for your reply!

I have already changed /etc/fstab to /dev/root / ext2 ro,noauto 0 1 before I opened this issue, but i still can write/edit around on /dev/root after reboot.

What am I doing wrong? I am just looking for a way to be completely read-only for less/no wear of the SD-Card...

TOLDOTECHNIK commented 1 year ago

Ok, we had a deeper look into this. It is not possible to have a read only filesystem by just changing the /etc/fstab configuration file. It needs a "file system overlay" so that the linux system works correctly. But for this an adapted version of the RPi image is necessary. We do not provide such.

salopeknet commented 1 year ago

Thank you very much for digging in and for clarification, guys! Herzliche Grüße nach Vaduz!