Proxmox VE Kernel

Introduction

Proxmox VE supports currently three kernel branches, each one with minor feature differences. Beginning with 1.6 the 2.6.32 is the default and recommended branch. (Proxmox VE 0.9 beta till Proxmox 1.4 used 2.6.24, Proxmox 1.5 used 2.6.18).

A Proxmox VE cluster master can manage a mixed kernel setup. For example, you can run two nodes with 2.6.18 and two nodes with 2.6.32 and also nodes with 2.6.35. Depending on the features, some migrations are only possible between identical kernels.

For correctly effecting a kernel change, it may be necessary to edit the /etc/fstab file for the /boot mount.

Kernel 2.6.18

• Stable OpenVZ
• Stable KVM

How to install 2.6.18

aptitude update
aptitude safe-upgrade
aptitude install proxmox-ve-2.6.18

To make sure that you boot into the new kernel, check /boot/grub/menu.lst. Now reboot and check if the system is running the right kernel.

Kernel 2.6.24 (outdated)

Note: no more updates planned for 2.6.24, so you should switch to a newer branch

• OpenVZ
• KVM

How to install 2.6.24

aptitude update
aptitude safe-upgrade
aptitude install proxmox-ve-2.6.24

To make sure that you boot into the new kernel, check /boot/grub/menu.lst. Now reboot and check if the system is running the right kernel.

Kernel 2.6.32

• Latest KVM
• Newest OpenVZ (maintained development branch)
• Default Kernel branch since Proxmox VE 1.6

How to install 2.6.32

aptitude update
aptitude safe-upgrade
aptitude install proxmox-ve-2.6.32

To make sure that you boot into the new kernel, check /boot/grub/menu.lst. Now reboot and check if the system is running the right kernel.

Kernel 2.6.35

• Latest KVM (KSM support)
• No OpenVZ

How to install 2.6.35

aptitude update
aptitude safe-upgrade
aptitude install proxmox-ve-2.6.35

To make sure that you boot into the new kernel, check /boot/grub/menu.lst. Now reboot and check if the system is running the right kernel.