Proxmox Edge kernels

Custom Linux kernels for Promox VE 6.

Versions

1. Linux 5.6 (EOL)
2. Linux 5.7 (EOL)
3. Linux 5.8 (EOL)
4. Linux 5.9 (EOL)
5. Linux 5.10
6. Linux 5.11

Flavors

1. Proxmox
2. Navi Reset

Microarchitectures

1. Generic
2. Zen 2
3. Cascade Lake

Installation

Select from the Releases page the kernel version you want to install and download the appropriate deb package. Then, you can install the package as follows:

apt install ./pve-kernel-VERSION-MARCH_VERSION_amd64.deb

AppArmor issues

When using these kernels, Proxmox's AppArmor profiles may fail to load since it uses an older AppArmor feature set which is not supported by these kernels anymore. This issue also appears when launching LXC containers. To fix this, tell AppArmor to use the stock features file as opposed to Proxmox's features file, which is done by updating /etc/apparmor/parser.conf as follows:

## Pin feature set (avoid regressions when policy is lagging behind
## the kernel)
# lxc-pve diverts to old feature file that is incompatible with kernel
# features-file=/usr/share/apparmor-features/features
features-file=/usr/share/apparmor-features/features.stock

Building manually

You may also choose to manually build one of these kernels yourself.

Prerequisites

Make sure you have at least 30GB of free space available and have the following packages installed:

apt install devscripts asciidoc-base automake bc bison cpio dh-python flex git kmod libdw-dev libelf-dev libiberty-dev libnuma-dev libpve-common-perl libslang2-dev libssl-dev libtool lintian lz4 perl-modules python2-minimal rsync sed sphinx-common tar xmlto zlib1g-dev dwarves

In case you are building a kernel version >= 5.8, make sure you have installed at least dwarves >= 1.16.0. Unfortunately, this version is currently only available in the Debian Testing and Debian Unstable repositories. To work around this issue, we describe two options:

1. You may add the Debian Testing repository to your APT sources as described here and install the newer dwarves package as follows:

apt install -t testing dwarves

2. Alternatively, you may download the newer dwarves (>= 1.16) package from the Debian website and install the package manually, for example:

wget http://ftp.us.debian.org/debian/pool/main/d/dwarves-dfsg/dwarves_1.17-1_amd64.deb
apt install ./dwarves_1.17-1_amd64.deb

Obtaining the source

Select the branch of your likings (e.g. v5.8.x) and update the submodules:

git clone https://github.com/fabianishere/pve-edge-kernel
cd pve-ede-kernel
git submodule update --init --depth=1 --recursive linux
git submodule update --init --recursive

Building

Invoking the following command will build the kernel and its associated packages:

make

The Makefile provides several environmental variables to control:

1. PVE_BUILD_FLAVOR
   The name of the kernel flavor which represents a selection of kernel functionality (e.g. hardened or zen). This name is part of the kernel version and package name, which means that you can have multiple flavors of the same kernel installed alongside each other. Note that the name itself does not control the selection of kernel functionality.
2. PVE_BUILD_TYPE (default generic)
   The name of the kernel build type which represents the compilation options of the kernel (e.g. optimization level or micro architecture). This name is appended as suffix to the Debian package version in case it is not the default value.
3. PVE_BUILD_CC
   The compiler to use for the kernel build.
4. PVE_BUILD_CFLAGS
   The compilation options to use for the kernel build. Use this variable to specify the optimization level or micro architecture to build for.

Kernel options may be controlled from the debian/rules file. To build with additional patches, you may add them to the debian/patches/pve directory and update the series file accordingly.

Questions

If you have any questions or want to see additional versions, flavors or micro architectures being built, feel free to open an issue on Github.