[SOLVED] Error 500: No Buffer Space Available after backup

[hennd]

Hi Community!
I just did a backup and now I can no longer access my VM via Proxmox Gui. I can, however, establish a SSH connection from my Terminal app.




I already ran into that issue before. I could not find any solution. So I created a new VM from an older backup. But now, three months later, I have the same issue.
Unfortunately, I am not very familiar with either Proxmox nor Linux. Any ideas how I can fix this issue?
Many thanks in advance!! Help is very much appreciated.
Best regards
HennD

 

[hennd]

Hi Community!

I just found out, that my .conf file gets corrupted over time and whenever I do a backup. It gets filled up with crap (mostly "Å" characters) and when it reaches a certain size it creates the error message Buffer 500. I can restore a clean .conf file an it just works fine.

Does anyone have an idea, what may cause the .conf file to go corrupt?

Many thanks in advance!

BR, HennD

 

[fiona]

Hi,
please share your configuration file cat /etc/pve/lxc/XYZ.conf and output of pveversion -v. Is there some special character in there? If yes, a fix is already in git and should be available some time in the coming weeks: https://git.proxmox.com/?p=pve-cluster.git;a=commit;h=2e276ccd9beb2004ddd72396b2a9b72a288771d8

 

[hennd]

Hi Fiona!
Thanks for your reply! Help is very much appreciated!
BR
Henrik

Output of cat /etc/pve/lxc/XYZ.conf of a corrupted .conf file looks like this (shortened):

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root@pve:~# pveversion -v proxmox-ve: 8.1.0 (running kernel: 6.5.11-7-pve) pve-manager: 8.1.3 (running version: 8.1.3/b46aac3b42da5d15) proxmox-kernel-helper: 8.1.0 pve-kernel-6.2: 8.0.5 proxmox-kernel-6.5: 6.5.11-7 proxmox-kernel-6.5.11-7-pve-signed: 6.5.11-7 proxmox-kernel-6.2.16-20-pve: 6.2.16-20 proxmox-kernel-6.2: 6.2.16-20 proxmox-kernel-6.2.16-19-pve: 6.2.16-19 pve-kernel-6.2.16-3-pve: 6.2.16-3 ceph-fuse: 17.2.6-pve1+3 corosync: 3.1.7-pve3 criu: 3.17.1-2 glusterfs-client: 10.3-5 ifupdown2: 3.2.0-1+pmx8 ksm-control-daemon: 1.4-1 libjs-extjs: 7.0.0-4 libknet1: 1.28-pve1 libproxmox-acme-perl: 1.5.0 libproxmox-backup-qemu0: 1.4.1 libproxmox-rs-perl: 0.3.3 libpve-access-control: 8.0.7 libpve-apiclient-perl: 3.3.1 libpve-common-perl: 8.1.0 libpve-guest-common-perl: 5.0.6 libpve-http-server-perl: 5.0.5 libpve-network-perl: 0.9.5 libpve-rs-perl: 0.8.7 libpve-storage-perl: 8.0.5 libspice-server1: 0.15.1-1 lvm2: 2.03.16-2 lxc-pve: 5.0.2-4 lxcfs: 5.0.3-pve4 novnc-pve: 1.4.0-3 proxmox-backup-client: 3.1.2-1 proxmox-backup-file-restore: 3.1.2-1 proxmox-kernel-helper: 8.1.0 proxmox-mail-forward: 0.2.2 proxmox-mini-journalreader: 1.4.0 proxmox-widget-toolkit: 4.1.3 pve-cluster: 8.0.5 pve-container: 5.0.8 pve-docs: 8.1.3 pve-edk2-firmware: 4.2023.08-2 pve-firewall: 5.0.3 pve-firmware: 3.9-1 pve-ha-manager: 4.0.3 pve-i18n: 3.1.5 pve-qemu-kvm: 8.1.2-6 pve-xtermjs: 5.3.0-3 qemu-server: 8.0.10 smartmontools: 7.3-pve1 spiceterm: 3.3.0 swtpm: 0.8.0+pve1 vncterm: 1.8.0 zfsutils-linux: 2.2.2-pve1 root@pve:~#

 

[fiona]

I think you should be fine just removing the parts with the special characters manually. They seems to be only comment/description and shouldn't affect the actual configuration. Are there actually no newlines between the options or did those get lost when copy-pasting? Otherwise, that also needs to be fixed.

 

[hennd]

Hi Fiona!
The problem is, that over time the special characters inflate the .conf file so that I run into the Buffer Space error which brings the container to a halt. All is good again, when I change the corrupted .conf with a good one.
BR, Henrik

 

[fiona]

The fix I linked in my first answer should solve that problem. And after you removed the special characters from a config file (while the guest is shut down), no new ones should appear by themselves.

 

[hennd]

@fiona
Thank you very much!!!!!