This document briefly describes the steps needed is a guide to install OpenVZ 6 (legacy) on your [https://en.wikipedia.org/wiki/Devuan Devuan 1 "Jessie"] or Debian 8 "Jessie" machine (both amd64 or i386) machine.

{{Out|Current commercial version of OpenVZ ([[Virtuozzo]] 7) is not installable on Devuan or Debian GNU/Linux because is developed as an independent GNU/Linux distribution}}

== Partitions '''Volumes and /vz file system =systems''' =

* btrfs mounted filesystems cannot be formatted with modern features as: mixed-bg, extref, skinny-metadata, no-holes. If used for containers, vzquota will not work to control containers disk space([[Installation on Debian 9#btrfs|More details]]).

== '''Change Systemd to SystemV =''' = {{Note|'''Only needed for Debian''' (Devuan already works with SystemV by default). '''Warning! :''' This operation can make some desktop software to stop working, such as desktop environments.}}

# Must boot with SystemV to release Systemd sudo reboot sudo apt-get --autoremove remove systemd echo -e 'Package: *systemd*\nPin: release *\nPin-Priority: -1\n' | sudo tee /etc/apt/preferences.d/avoid-systemd

* Other More recipes at [http://without-systemd.org/wiki/index.php/How_to_remove_systemd_from_a_Debian_jessie/sid_installation without-systemd.org]

== '''Register OVZ updated repository =''' =

echo "#deb $RepoUrl jessie-test main" | sudo tee -a "$RepoFile"

{{Note|For more info about Debian repositories, see http://download.openvz.org/debian.}}

== '''Install packages =''' =

== sysctl ==* Only Devuan: link to be recognised as Debian There are a number of kernel parameters that should be set for OpenVZ to work correctly. These parameters are stored in <tt> if [ -f /etc/devuan_version ] ; then sudo ln -s /etc/sysctl.conf<devuan_version /tt> file. Here are the relevant portions of the fileetc/debian_version ; please edit accordingly. <pre># On Hardware Node we generally need# packet forwarding enabled and proxy arp disablednet.ipv4.ip_forward = 1net.ipv6.conf.default.forwarding = 1net.ipv6.conf.all.forwarding = 1net.ipv4.conf.default.proxy_arp = 0fi

# Enables source route verificationnet.ipv4.conf.all.rp_filter = 1'''Reboot into OpenVZ kernel''' =

# Enables the magic-sysrq keykernel{{Note|At boot manager, in "Advanced options for Devuan GNU+Linux", you will find kernels named "2.sysrq = 1 # We do not want all our interfaces to send redirectsnet6.ipv4.conf.default.send_redirects = 1net32-openvz".ipv4.conf.all.send_redirects = 0</pre> == Help Select the project == This is an OpenVZ component you can install to gather OpenVZ usage and hardware statistics, in order to improve the projectfirst listed.  sudo apt-get install vzstats == Reboot into OpenVZ kernel ==}}

{{Note|If you don't see a boot manager entry with word "'''openvz'''", you must choose "'''Advanced options'''" to select there first ''openvz'' listed kernel.}} Check that the OpenVZ processes are running:

Because of GRUB2 default criteria, default kernel to boot can still be the one from DebianDevuan's repository (non OVZ). If Probably you don't want to change this behaviour, ; once you've booted fine into OpenVZ kernel, you can remove other unuseful kernels:

sudo apt-get --autoremove remove $Packages sudo apt-get autoremove(requires aptitude)

== Download OS templates ==

An OS template is a GNU distribution for Linux distribution , installed into a container

Alternatively, you can also download Alternatives:* Download precreated template caches from [http://openvz.org/download[Download/template/cache Downloads precreated|Download » Templates Template » Precreated], ] or from one of the [https://mirrors.openvz.org/ mirrors]. Put those tarballs '''as-is (no unpacking needed)''' to the <tt>/vz/template/cache/</tt> directory.* '''[https://downloads.actiu.net/ctctl/ ctctl]''' helper to create Debian (or derivative) container without template (caches it as a local template). This tool manages unprivileged LXC containers too.

== Next steps ==

== See also ==* [[Installation on Debian 7]] very-old-stable (Wheezy, SystemV by default, supported)