Proxmox

Subpages

Subpage Table of Contents

• Proxmox/API
• Proxmox/Ceph
• Proxmox/Ceph Hyper Converged
• Proxmox/Clock Sync
• Proxmox/Fix Keyring
• Proxmox/Install
• Proxmox/LVM
• Proxmox/Nag Buster
• Proxmox/SSL Redirect
• Proxmox/Serial Device
• Proxmox/Shrink LVM-Thin
• Proxmox/Shrink LVM Root
• Proxmox/Ventoy
• Proxmox/iomemory-vsl
• Proxmox/syslog

Get Version from Command Line

pveversion

pveversion --verbose

Sync Config Manually

corosync

Virtualization Management

Virtual Machines vs Containers

Proxmox can create and manage both fully-fledged Virtual Machines (VMs) and light-weight Linux Containers (LCX).

VM Managemnet

qm - QEMU/KVM Virtual Machine Manager

List VMs:

qm list

Stop VM:

qm stop [VMID]

Start VM:

qm start [VMID]

LCX Container Management

pct - Tool to manage Linux Containers (LXC) on Proxmox VE

List Containers:

pct list

Stop Container:

pct stop [VMID]

Start Container:

pct start [VMID]

NFS in Container

Mark "NFS" in features, but first it will need to be a "Privileged" container.

To convert to Priveleged, simply run a backup, then restore and mark the "priveleged" checkbox. Pretty easy.

---

NFS requires extra permissions to run in a Container (CT), which uses LXC.

Deselect "Unprivileged container", and add the Features "mount=nfs"

# mount 192.168.108.30:/nfs/ken /mnt
mount.nfs: access denied by server while mounting 192.168.108.30:/nfs/ken

When trying to add the "mount=nfs" feature:

Permission check failed (changing feature flags for privileged container is only allowed for root@pam) (403)

Login as root and:

pct set 112 -features mount=nfs

# pct set 112 -features mount=nfs --save  # is this needed?

ref [1] [2]

---

List Data Stores

List data stores and status:

pvesm status

Free Subscription Repositories

1. Disable ceph Enterprise
2. Disable pve-enterprise
3. Add pve-no-subscription repo - deb http://download.proxmox.com/debian/pve bookworm pve-no-subscription

/etc/apt/sources.list :

deb http://ftp.us.debian.org/debian bookworm main contrib

deb http://ftp.us.debian.org/debian bookworm-updates main contrib

# security updates
deb http://security.debian.org bookworm-security main contrib

deb http://download.proxmox.com/debian/pve bookworm pve-no-subscription

/etc/apt/sources.list.d/ceph.list :

# deb https://enterprise.proxmox.com/debian/ceph-quincy bookworm enterprise

/etc/apt/sources.list.d/pve-enterprise.list :

# deb https://enterprise.proxmox.com/debian/pve bookworm pve-enterprise

Note: this can be configured from the web interface too.

Install sudo

apt update
apt install sudo

LXC - Linux Containers

To use the LC options you first need to download a LC template.

First update the list:

pveam update

Note: The list of available templates is updated daily through the pve-daily-update timer

To list images:

pveam available

To list only system images:

pveam available --section system

Example:

root@proxmox1:~# pveam available --section system
system          almalinux-9-default_20221108_amd64.tar.xz
system          alpine-3.18-default_20230607_amd64.tar.xz
system          archlinux-base_20230608-1_amd64.tar.zst
system          centos-9-stream-default_20221109_amd64.tar.xz
system          debian-11-standard_11.7-1_amd64.tar.zst
system          debian-12-standard_12.2-1_amd64.tar.zst
system          devuan-4.0-standard_4.0_amd64.tar.gz
system          fedora-38-default_20230607_amd64.tar.xz
system          fedora-39-default_20231118_amd64.tar.xz
system          gentoo-current-openrc_20231009_amd64.tar.xz
system          opensuse-15.4-default_20221109_amd64.tar.xz
system          opensuse-15.5-default_20231118_amd64.tar.xz
system          rockylinux-9-default_20221109_amd64.tar.xz
system          ubuntu-20.04-standard_20.04-1_amd64.tar.gz
system          ubuntu-22.04-standard_22.04-1_amd64.tar.zst
system          ubuntu-23.04-standard_23.04-1_amd64.tar.zst
system          ubuntu-23.10-standard_23.10-1_amd64.tar.zst

Download to data store:

pveam download mydatastore ubuntu-22.04-standard_22.04-1_amd64.tar.zst

List images on data store:

pveam list mydatastore

# example
NAME                                                                 SIZE
mydatastore:vztmpl/ubuntu-22.04-standard_22.04-1_amd64.tar.zst       123.81MB

To remove:

pveam remove mydatastore:vztmpl/ubuntu-22.04-standard_22.04-1_amd64.tar.zst

See https://pve.proxmox.com/wiki/Linux_Container

Upgrade Proxmox 7 to Proxmox 8

Upgrade from 7 to 8 - Proxmox VE
https://pve.proxmox.com/wiki/Upgrade_from_7_to_8

Update to latest v7:

apt update
apt dist-upgrade

Checks:

pve7to8

All checks:

pve7to8 --full

Switch to Bookworm:

sed -i 's/bullseye/bookworm/g' /etc/apt/sources.list

sed -i 's/bullseye/bookworm/g' /etc/apt/sources.list.d/*

Add VE 8:

# echo "deb https://enterprise.proxmox.com/debian/pve bookworm pve-enterprise" > /etc/apt/sources.list.d/pve-enterprise.list
sed -i -e 's/bullseye/bookworm/g' /etc/apt/sources.list.d/pve-install-repo.list 

Update system to v8:

apt update
apt dist-upgrade

Issues

Suck Backup Job

ps awxf | grep vzdump

Proper way to stop:

vzdump -stop

Usually related to mount points

If that doesn't work, can kill. Find process first.

root@proxmox1:~# ps awxf | grep vzdump
1305267 pts/0    S+     0:00          \_ grep vzdump
 916782 ?        Ss     0:02 task UPID:proxmox2:000DFD2E:9A21B1C6:670B61EA:vzdump::root@pam:
 916789 ?        S      0:00  \_ rsync --stats -h --numeric-ids -aH --delete --no-whole-file --sparse --one-file-system --relative --exclude=/tmp/?* --exclude=/var/tmp/?* --exclude=/var/run/?*.pid /proc/262434/root//./ /mnt/pve/TrueNAS/dump/vzdump-lxc-108-2024_10_13-00_00_10.tmp
 916790 ?        S      0:00      \_ rsync --stats -h --numeric-ids -aH --delete --no-whole-file --sparse --one-file-system --relative --exclude=/tmp/?* --exclude=/var/tmp/?* --exclude=/var/run/?*.pid /proc/262434/root//./ /mnt/pve/TrueNAS/dump/vzdump-lxc-108-2024_10_13-00_00_10.tmp
 916791 ?        S      0:00          \_ rsync --stats -h --numeric-ids -aH --delete --no-whole-file --sparse --one-file-system --relative --exclude=/tmp/?* --exclude=/var/tmp/?* --exclude=/var/run/?*.pid /proc/262434/root//./ /mnt/pve/TrueNAS/dump/vzdump-lxc-108-2024_10_13-00_00_10.tmp

Kill the process ID associated with the task, which should cause it to jump to the next task.

But this seems to leave everything in a locked state for backup

# kill 916782

Unlock VM

To unlock a VM that is stuck in a locked state:

qm unlock 101

see pct for LXCs

Unlock LXC Container

To unlock a LXC Container that is stuck in a locked state:

pct unlock 101

ping - Operation not permitted

Fix with:

setcap cap_net_raw+ep /bin/ping

or:

chmod u+s /sbin/ping

"I suspect the setuid workaround would likely work and is how ping was shipped in distros for a very long time (and so not particularly risky)."

ref

sudo - setrlimit(RLIMIT_CORE): Operation not permitted

Inside of Ubuntu 20 LXC...

$ sudo hello > /dev/null
sudo: setrlimit(RLIMIT_CORE): Operation not permitted

Bug in sudo version. Just update sudo.

apt update
apt upgrade sudo

Alt workaround:

echo "Set disable_coredump false" >> /etc/sudo.conf

ref