Difference between revisions of "Installation on Debian 8"

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This document briefly describes the steps needed to install OpenVZ 6 (legacy) on your Debian 8 "Jessie" (amd64 or i386) machine. Consider [https://www.devuan.org/ Devuan GNU+Linux 1.0] for complete integration without Systemd.
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This 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).
  
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{{Out|Current commercial version of OpenVZ ([[Virtuozzo]] 7) is not installable on Debian GNU/Linux because is developed as an independent distribution}}
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{{Out|Current commercial version of OpenVZ ([[Virtuozzo]] 7) is not installable on Devuan or Debian because is developed as an independent GNU/Linux distribution}}
  
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== Partitions and /vz file system ==
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= '''Volumes and file systems''' =
  
 
* It is recommended to use a separate partition for containers (by default '''/var/lib/vz''') and format it to '''ext4'''.
 
* It is recommended to use a separate partition for containers (by default '''/var/lib/vz''') and format it to '''ext4'''.
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* 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.
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* btrfs mounted filesystems cannot be formatted with modern features as: mixed-bg, extref, skinny-metadata, no-holes ([[Installation on Debian 9#btrfs|More details]]).
  
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== Change Systemd to SystemV ==
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= '''Change Systemd to SystemV''' =
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(Not needed on Devuan OS)
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'''Only needed for Debian''' (Devuan already works with SystemV by default). '''Warning:''' This operation can make some desktop software to stop working.
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{{Note|Warning! This operation can make some software to stop working, such as desktop environments.}}
 
  
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  sudo apt-get install sysvinit-core sysvinit-utils
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  sudo apt install sysvinit-core sysvinit-utils
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  sudo apt-get remove systemd
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# Must boot with SystemV to release Systemd
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sudo reboot
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  sudo apt --auto-remove remove systemd
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echo -e 'Package: *systemd*\nPin: release *\nPin-Priority: -1\n' | sudo tee /etc/apt/preferences.d/systemd
  
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* Other recipes at [http://without-systemd.org/wiki/index.php/How_to_remove_systemd_from_a_Debian_jessie/sid_installation without-systemd.org]
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* More recipes at [http://without-systemd.org/wiki/index.php/How_to_remove_systemd_from_a_Debian_jessie/sid_installation without-systemd.org]
  
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== Register OVZ updated repository ==
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= '''Register OVZ updated repository''' =
  
 
  RepoFile=/etc/apt/sources.list.d/openvz.list
 
  RepoFile=/etc/apt/sources.list.d/openvz.list
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{{Note|The second line with jessie-test is commented out. This is a testing repo with newer kernels and possibly tools. Enable it if you want to stay on a bleeding edge of technology.}}
 
{{Note|The second line with jessie-test is commented out. This is a testing repo with newer kernels and possibly tools. Enable it if you want to stay on a bleeding edge of technology.}}
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{{Note|For more info about Debian repositories, see http://download.openvz.org/debian.}}
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For more info about Debian repositories, see http://download.openvz.org/debian
  
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== Install packages ==
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= '''Install packages''' =
  
 
  KPackage="linux-image-openvz-$(dpkg --print-architecture)"
 
  KPackage="linux-image-openvz-$(dpkg --print-architecture)"
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  VE_STOP_MODE=stop
 
  VE_STOP_MODE=stop
  
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== sysctl ==
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= '''Reboot into OpenVZ kernel''' =
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There are a number of kernel parameters that should be set for OpenVZ to work correctly. These parameters are stored in <tt>/etc/sysctl.conf</tt> file. Here are the relevant portions of the file; please edit accordingly.
 
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<pre>
 
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# On Hardware Node we generally need
 
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# packet forwarding enabled and proxy arp disabled
 
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net.ipv4.ip_forward = 1
 
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net.ipv6.conf.default.forwarding = 1
 
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net.ipv6.conf.all.forwarding = 1
 
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net.ipv4.conf.default.proxy_arp = 0
 
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# Enables source route verification
 
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net.ipv4.conf.all.rp_filter = 1
 
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# Enables the magic-sysrq key
 
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kernel.sysrq = 1
 
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# We do not want all our interfaces to send redirects
 
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net.ipv4.conf.default.send_redirects = 1
 
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net.ipv4.conf.all.send_redirects = 0
 
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</pre>
 
  
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== Help the project ==
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{{Note|At boot manager, in "Advanced options for Devuan GNU+Linux", you will find kernels named "2.6.32-openvz". Select the first listed.}}
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This is an OpenVZ component you can install to gather OpenVZ usage and hardware statistics, in order to improve the project.
 
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sudo apt-get install vzstats
 
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== Reboot into OpenVZ kernel ==
 
  
 
  sudo reboot
 
  sudo reboot
  
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{{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.}}
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Check the OpenVZ processes are running:
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Check that the OpenVZ processes are running:
 
 
  sudo ps ax | grep -v 'grep' | grep 'vzmond'
 
  sudo ps ax | grep -v 'grep' | grep 'vzmond'
  
 
== Set OpenVZ as default to boot ==
 
== Set OpenVZ as default to boot ==
  
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Because of GRUB2 default criteria, default kernel to boot can still be the one from Debian's repository (non OVZ). If you want to change this behaviour, once you've booted fine into OpenVZ kernel, you can remove other unuseful kernels:
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Because of GRUB2 default criteria, default kernel to boot can still be the one from Devuan's repository (non OVZ). Probably you don't want this behaviour; once you've booted fine into OpenVZ kernel, you can remove other unuseful kernels:
  
 
  Packages="$(aptitude search ~i~nlinux-image- --display-format '%p' | grep -ve 'openvz')"
 
  Packages="$(aptitude search ~i~nlinux-image- --display-format '%p' | grep -ve 'openvz')"
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  sudo apt-get autoremove
 
  sudo apt-get autoremove
  
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== Download OS templates ==
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= Download OS templates =
  
 
This step is optional, vzctl is able to download templates on demand.
 
This step is optional, vzctl is able to download templates on demand.
  
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An OS template is a Linux distribution installed into a container
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An OS template is a GNU distribution for Linux, installed into a container
 
and then packed into a gzipped tarball. Using such a cache, a new container
 
and then packed into a gzipped tarball. Using such a cache, a new container
 
can be created in a minute.
 
can be created in a minute.
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  sudo vztmpl-dl --gpg-check debian-8.0-x86_64-minimal
 
  sudo vztmpl-dl --gpg-check debian-8.0-x86_64-minimal
  
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Alternatively, you can also download precreated template caches from [http://openvz.org/download/template/cache Downloads » Templates » 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.
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Alternatively, you can also download precreated template caches from [[Download/template/precreated|Download » 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.
  
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== Next steps ==
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= Next steps =
  
 
OpenVZ is now set up on your machine. Follow on to [[basic operations in OpenVZ environment]] document.
 
OpenVZ is now set up on your machine. Follow on to [[basic operations in OpenVZ environment]] document.
  
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== See also ==
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= See also =
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* [[Installation on Debian 7]] very-old-stable (SystemV by default, supported)
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* [[Installation on Debian 7]] very-old-stable (Wheezy, SystemV by default)
 
* [[Installation on Debian 9]]
 
* [[Installation on Debian 9]]
  
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[[Category: HOWTO]]
 
[[Category: HOWTO]]
 
[[Category: Debian]]
 
[[Category: Debian]]
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[[Category: Devuan]]

Revision as of 09:44, 13 July 2017

This is a guide to install OpenVZ 6 (legacy) on your Devuan 1 "Jessie" or Debian 8 "Jessie" machine (both amd64 or i386).

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

Volumes and file systems

  • It is recommended to use a separate partition for containers (by default /var/lib/vz) and format it to ext4.
  • btrfs mounted filesystems cannot be formatted with modern features as: mixed-bg, extref, skinny-metadata, no-holes (More details).

Change Systemd to SystemV

Only needed for Debian (Devuan already works with SystemV by default). Warning: This operation can make some desktop software to stop working. 

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

Register OVZ updated repository

RepoFile=/etc/apt/sources.list.d/openvz.list
RepoUrl=http://download.openvz.org/debian
echo "deb $RepoUrl jessie main" | sudo tee "$RepoFile"
echo "#deb $RepoUrl jessie-test main" | sudo tee "$RepoFile"
echo "deb $RepoUrl wheezy main" | sudo tee -a "$RepoFile"
wget -qO - http://ftp.openvz.org/debian/archive.key | sudo apt-key add -
sudo apt-get update
Yellowpin.svg Note: The second line with jessie-test is commented out. This is a testing repo with newer kernels and possibly tools. Enable it if you want to stay on a bleeding edge of technology.

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

Install packages

KPackage="linux-image-openvz-$(dpkg --print-architecture)"
sudo apt-get --install-recommends install $KPackage vzdump ploop initramfs-tools
if [ ! -d /vz ] ; then sudo ln -s /var/lib/vz/ /vz ; fi
  • Create file /etc/vz/vznet.conf with the following line:
EXTERNAL_SCRIPT="/usr/sbin/vznetaddbr"
  • Optionally you can set containers completely stop when service stops at /etc/vz/vz.conf
VE_STOP_MODE=stop

Reboot into OpenVZ kernel

Yellowpin.svg Note: At boot manager, in "Advanced options for Devuan GNU+Linux", you will find kernels named "2.6.32-openvz". Select the first listed. 
sudo reboot

Check the OpenVZ processes are running: 

sudo ps ax | grep -v 'grep' | grep 'vzmond'

Set OpenVZ as default to boot

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

Packages="$(aptitude search ~i~nlinux-image- --display-format '%p' | grep -ve 'openvz')"
sudo apt-get remove $Packages
sudo apt-get autoremove

Download OS templates

This step is optional, vzctl is able to download templates on demand.

An OS template is a GNU distribution for Linux, installed into a container and then packed into a gzipped tarball. Using such a cache, a new container can be created in a minute. 

OpenvzKey="$(echo $(sudo gpg --batch --search-keys security@openvz.org 2>&1 | grep -ie ' key.*created' | sed -e 's|key|@|g' | cut -f 2 -d '@') | cut -f 1 -d ' ' | cut -f 1 -d ',')"
sudo gpg --recv-keys $OpenvzKey
sudo vztmpl-dl --gpg-check --list-remote
# Example:
sudo vztmpl-dl --gpg-check debian-8.0-x86_64-minimal

Alternatively, you can also download precreated template caches from Download » Template » Precreated, or from one of the mirrors. Put those tarballs as-is (no unpacking needed) to the /vz/template/cache/ directory.

Next steps

OpenVZ is now set up on your machine. Follow on to basic operations in OpenVZ environment document.

See also

Retrieved from "https://wiki.openvz.org/index.php?title=Installation_on_Debian_8&oldid=22738"