Revision as of 12:18, 14 June 2021 by Tony (talk | contribs)






Directory structure







Monitoring proxmox with zabbix


Proxmox API call failed: Couldn't authenticate user: zabbix@pve

Funky characters in password string?


Stop all proxmox services

systemctl stop pve-cluster systemctl stop pvedaemon systemctl stop pveproxy systemctl stop pvestatd


switch to community repository

cat /etc/apt/sources.list.d/pve-enterprise.list 
#deb buster pve-enterprise
echo "deb buster pve-no-subscription" > /etc/apt/sources.list.d/pve-no-subscription.list 
apt update

W: (pve-apt-hook) You are attempting to remove the meta-package 'proxmox-ve'!

cehck sources.list :)



unexpected property 'prune-backups' (500)

When for example Add: iSCSI Uncheck "Keep all backups" in "Backup retention"



Error: VM quit/powerdown failed - got timeout

qm stop VMID

if that complains about lock, remove the lock and try again


a used vhost backend has no free memory slots left

You have not turned on protection against thin pools running out of space.

serial console from command line

qm terminal <id}

enable serial console in guest

looks like this is not needed:

systemctl enable serial-getty@ttyS0.service

in /etc/default/grub

GRUB_CMDLINE_LINUX_DEFAULT="console=ttyS0 console=tty0"

ttyS0 is for qm terminal, tty0 is for the "console" buttion in UI

  1. debian based


  1. redhat based

grub2-mkconfig --output=/boot/grub2/grub.cfg



serial0: socket

to /etc/pve/qemu-server/[vmid].conf and restart


agetty: /dev/ttyS0: not a device

systemctl status useless again, means the serial bit is missing from <vmid>.conf

TASK ERROR: command 'apt-get update' failed: exit code 100

subtle way of telling you to get subscription of at least change the sources list

Import vmdk to lvm

Can't apply changes to memory allocation

Maybe try enabling NUMA in CPU settings



Adding hardware shows orange

something is not supported (Options->Hotplug)

"Connection error 401: no ticket"

Login session expired?

can't lock file '/var/lock/qemu-server/lock-102.conf' - got timeout (500)

Maybe someone else has/had webui open

== TASK ERROR: Can't use string ("keep-all=0,keep-last=3") as a HASH ref while "strict refs" in use at /usr/share/perl5/PVE/ line 502. ==

Classic, means incorrect syntax in your /etc/pve/storage.cfg


The current guest configuration does not support taking new snapshots

You're using raw instead of qcow2. Convert: Hardware->Hard disk "Move Disk"


WARNING: Device /dev/dm-21 not initialized in udev database even after waiting 10000000 microseconds.

Until someone fixes it:

udevadm trigger