Proxmox 6.0 Bug, hung kernel and how to fix it.

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We have been running Proxmox 6.0 in some servers and after a few weeks, they were having a hung issue. one-by-one all VMs would be inaccessible and the node itself will accessible in SSH only. When this article published the latest version is 6.1 but this tutorial will upgrade whatever the latest version of 6.x

How to fix it: You have to upgrade your Proxmox 6.0 into 6.1, the following are the steps:

Update a running Proxmox Virtual Environment 6.x to latest 6.x

Here is the howto for the CLI:

Check your sources.list file, should look like this:

deb http://deb.debian.org/debian buster main contrib

deb http://deb.debian.org/debian buster-updates main contrib

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

The enterprise repository:

cat /etc/apt/sources.list.d/pve-enterprise.list
deb https://enterprise.proxmox.com/debian/pve buster pve-enterprise

Update your repository and packages:

apt update

If you get any errors, your sources.list (or your network) has a problem.

Now upgrade the packages:

apt dist-upgrade

Reboot to activate the new Kernel, to check if you got all packages, run ‘pveversion -v’ and compare your output (all packages should have equal or higher version numbers):

pve-server:~# pveversion -v

proxmox-ve: 6.1-2 (running kernel: 5.3.18-2-pve)
pve-manager: 6.1-8 (running version: 6.1-8/806edfe1)
pve-kernel-helper: 6.1-7
pve-kernel-5.3: 6.1-5
pve-kernel-5.3.18-2-pve: 5.3.18-2
ceph-fuse: 12.2.11+dfsg1-2.1+b1
corosync: 3.0.3-pve1
criu: 3.11-3
glusterfs-client: 5.5-3
ifupdown: 0.8.35+pve1
ksm-control-daemon: 1.3-1
libjs-extjs: 6.0.1-10
libknet1: 1.15-pve1
libpve-access-control: 6.0-6
libpve-apiclient-perl: 3.0-3
libpve-common-perl: 6.0-17
libpve-guest-common-perl: 3.0-5
libpve-http-server-perl: 3.0-5
libpve-storage-perl: 6.1-5
libqb0: 1.0.5-1
libspice-server1: 0.14.2-4~pve6+1
lvm2: 2.03.02-pve4
lxc-pve: 3.2.1-1
lxcfs: 3.0.3-pve60
novnc-pve: 1.1.0-1
proxmox-mini-journalreader: 1.1-1
proxmox-widget-toolkit: 2.1-3
pve-cluster: 6.1-4
pve-container: 3.0-22
pve-docs: 6.1-6
pve-edk2-firmware: 2.20200229-1
pve-firewall: 4.0-10
pve-firmware: 3.0-6
pve-ha-manager: 3.0-9
pve-i18n: 2.0-4
pve-qemu-kvm: 4.1.1-4
pve-xtermjs: 4.3.0-1
qemu-server: 6.1-7
smartmontools: 7.1-pve2
spiceterm: 3.1-1
vncterm: 1.6-1
zfsutils-linux: 0.8.3-pve1

pve-server:~#

Important Note

If you already use your Proxmox VE Subscription Key, access to the Enterprise repository works out of the box. For more details about the Proxmox VE repositories, see Package repositories

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