[SOLVED] SOLVED Reboot caused a kernel panic !!

[myozone]

Just rebooted my Proxmox server and now it comes up with Kernel Panic block 0,0 - I've attached the screen shot.

A while ago I removed old unused kernels but I thought not the last plus one other. Maybe that is the issue as the server has not been rebooted for a while. I really don't want to reinstall from fresh as that would obviously mean a massive reconfig. I have backups of VM's and I did copy the root and etc folders.

I have looked at the boot drive with Gparted and looks ok from what I can tell.

This server runs everything on four VM's FreePBX, Pfsense, being the main two and Debian running the house via Node-red etc etc

Any help would be MUCH appreciated !

 

[cwt]

It looks like your cleanup was to „clean“. Do you use a single drive or raid/zfs?

You can use:

• a Proxmox VE ISO → choose “Rescue shell” or “Debug shell”,
  or
• any Debian/Ubuntu live ISO or SystemRescue stick.

Find your root partition:

lsblk

If you have LVM:

vgchange -ay
mount /dev/pve/root /mnt

Or ZFS:

zpool import -N -a
mount -t zfs rpool/ROOT/pve-1 /mnt

Ext4 (sda2 for example):

mount /dev/sda2 /mnt

Now mount system directories and chroot:

mount --bind /dev /mnt/dev
mount --bind /proc /mnt/proc
mount --bind /sys /mnt/sys
chroot /mnt

Rebuild initramfs & GRUB:

update-initramfs -c -k all
update-grub

If you encounter missing kernel headers/modules:

apt install --reinstall pve-kernel-6.14.11-4-pve
update-initramfs -u -k all
update-grub

To finish:

exit
reboot

 

[myozone]

Thank you for your reply.

I use a single drive and I did remove the LVM? volume and used that free space from the start when the server was first in commission - I used a YouTube video for the information on that. I did try the Proxmox resue option from a Ventoy boot usb but that just jumped back to the panic screen when I clicked on rescue, that could be BIOS boot issue?

 

[cwt]

Oops… I think you removed your root filesystem. If you have no backup then you have to start from scratch.

 

[myozone]

First off thank you again for your help. Indeed your post did get my system going again I followed it exactly (I didn't need to reinstall the kernel)

Sorry for the confusion I meant the localLVM like in this youtube not the LVM volume - thankfully

It's horrible to go to bed last night thinking with that sick feeling of remembering all the config settings and nightmare of rebuilding. Next time I'll backup the entire drive when I get a NVME USB adapter and another USB SSD to copy to.

Thank you again for your help and time !

Now to fix the washing machine with an ebay inverter motor driver...

 

[cwt]

Good to hear. When you‘ve fixed your washing machine please change your topic to solved - that will help other users

 

[myozone]

Good to hear. When you‘ve fixed your washing machine please change your topic to solved - that will help other users

Done marked as solved - thanks !

No more cold sweats - for a while...

(Still waiting on the post for the inverter)