GUI and SSH of Proxmox suddenly stop working

[carminefox]

Hello everyone, I was configuring Proxmox Backup Server on my Proxmox server when, while entering the PBS fingerprint, I was disconnected from Proxmox. Upon refreshing the page, I noticed it was no longer accessible, so I decided to log in via SSH to restart Proxmox. However, SSH wasn’t working either.

The VMs were running normally, as I was able to access them via SSH without any issues. Proxmox is running on 10.0.1.6. I’m not sure what happened, but both SSH and the GUI are completely broken and unreachable. Even if I try to ping 10.0.1.6, it’s not reachable.

The only thing I was doing at the time was modifying the PBS IP in Proxmox’s storage.cfg file—nothing unusual. What could be the issue? I have no way to access the Proxmox shell since I also enabled GPU passthrough, so the shell is unavailable on the monitor. What do you recommend I do?

 

[carminefox]

Does anyone have any ideas?

 

[BobhWasatch]

Disable virtualization in BIOS so your pass-thru VM won't start and you have a screen to log in and troubleshot.

ETA: Or boot from a Live CD of some sort and fix it from there. How you do this depends on what your setup is (ZFS? Single Disk? SW Raid?).

 

[BobhWasatch]

And then set up a serial console or some other way to get in when you pass through your only GPU.

 

[aabraham]

Hello everyone, I was configuring Proxmox Backup Server on my Proxmox server when, while entering the PBS fingerprint, I was disconnected from Proxmox. Upon refreshing the page, I noticed it was no longer accessible, so I decided to log in via SSH to restart Proxmox. However, SSH wasn’t working either.

The VMs were running normally, as I was able to access them via SSH without any issues. Proxmox is running on 10.0.1.6. I’m not sure what happened, but both SSH and the GUI are completely broken and unreachable. Even if I try to ping 10.0.1.6, it’s not reachable.

The only thing I was doing at the time was modifying the PBS IP in Proxmox’s storage.cfg file—nothing unusual. What could be the issue? I have no way to access the Proxmox shell since I also enabled GPU passthrough, so the shell is unavailable on the monitor. What do you recommend I do?

Where did you install the Proxmox Backup Server?

 

[gfngfn256]

while entering the PBS fingerprint, I was disconnected from Proxmox

The only thing I was doing at the time was modifying the PBS IP in Proxmox’s storage.cfg file—nothing unusual

Which one is it?

Is your PBS instance on a physical different node or is it on the (same) PVE one? This could be the source of your troubles - which I imagine are NW based.