[SOLVED] No way to access my server anymore

[GzD]

Hi,

I have a server with a single GPU I use to passthrough a VM. To accomplish this I followed the official guide (https://pve.proxmox.com/wiki/Pci_passthrough) and everything work fine so far but because the driver of the GPU is blacklisted I have no local shell anymore.
Today I tried to make some changes on the network configuration through the PVE's WebGUI and made a mistake because yet I cannot access to the server through that WebGUI nor through SSH.

For now I haven't find any mean to access my server locally because of the 1st statement I've exposed: what could I do to get a local access to the server and make manually the changes in /etc/network/interfaces ?
Is there any "safe mode" I could trigger during boot in order to make the shell to be reachable ?

Here are the attempts I made:

• I have tried to switch my BIOS to legacy mode in order to avoid the configuration for the GPU to be applied but without success;
• I have tried the "rescue mode" from the ISO but without success (because the boot is obviously not broken);
• I have tried a Ubuntu live DVD in order to try to update /etc/network/interfaces prior to reboot on PVE but ZFS is not natively installed (and I was a bit afraid for installing something and eventually broke the pool).

I am currently out of ideas and I would prefer to do not break everything...
Thank you for help.

Best regards,

GzD

 

[Lorenz.S]

The Ubuntu live CD was a good try From what I know, this CDs should include ZFS. However, another possibility would be to use the PVE Installer ISO, enter the debug mode and chroot into your "broken" installation.

 

[GzD]

Thank you for your answer Lorenz.S.

I did try with the PVE Installer in debug mode but it fails anytime to go to the second shell (when I leave the first one with Ctrl+D) and the system get stuck.
But I gave another shot to Ubuntu (21.04 this time versus 20.04 for my previous attempt) and this time all the flags of the pool are well supported and I have been able to import it using the command:

zpool import -f -R /mnt rpool

Then I did fix the issue I had introduced using chroot as you mentioned and editing the config file.

Problem solved. Thank you again.