Installation on Debian 8
This document briefly describes the steps needed to install OpenVZ 6 (legacy) on your Debian 8 "Jessie" (amd64 or i386) machine.
Contents
Partitions and /vz file system
- 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. If used for containers, vzquota will not work to control containers disk space.
Change Systemd to SystemV
Note: Warning! This operation can make some software to stop working, such as desktop environments. |
sudo apt-get install sysvinit-core sysvinit-utils sudo apt-get remove systemd
- Other recipes at without-systemd.org
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
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: 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 $KPackage vzdump ploop initramfs-tools if [ ! -d /vz ] ; then sudo ln -s /var/lib/vz/ /vz ; fi
- Create file /etc/vz/vznet.conf with the following line:
EXTERNAL_SCRIPT="/usr/sbin/vznetaddbr"
- Optionally you can set containers completely stop when service stops at /etc/vz/vz.conf
VE_STOP_MODE=stop
sysctl
There are a number of kernel parameters that should be set for OpenVZ to work correctly. These parameters are stored in /etc/sysctl.conf file. Here are the relevant portions of the file; please edit accordingly.
# On Hardware Node we generally need # packet forwarding enabled and proxy arp disabled net.ipv4.ip_forward = 1 net.ipv6.conf.default.forwarding = 1 net.ipv6.conf.all.forwarding = 1 net.ipv4.conf.default.proxy_arp = 0 # Enables source route verification net.ipv4.conf.all.rp_filter = 1 # Enables the magic-sysrq key kernel.sysrq = 1 # We do not want all our interfaces to send redirects net.ipv4.conf.default.send_redirects = 1 net.ipv4.conf.all.send_redirects = 0
Help the project
This is an OpenVZ component you can install to gather OpenVZ usage and hardware statistics, in order to improve the project.
sudo apt-get install vzstats
Reboot into OpenVZ kernel
sudo reboot
Note: If you don't see a boot manager entry with word "openvz", you must choose "Advanced options" to select there first openvz listed kernel. |
Check that the OpenVZ processes are running:
sudo ps ax | grep -v 'grep' | grep 'vzmond'
Set OpenVZ as default to boot
Because of GRUB2 default criteria, default kernel to boot can still be the one from Debian's repository (non OVZ). If you want to change this behaviour, once you've booted fine into OpenVZ kernel, you can remove other unuseful kernels:
Packages="$(aptitude search ~i~nlinux-image- --display-format '%p' | grep -ve 'openvz')" sudo apt-get remove $Packages sudo apt-get autoremove
Download OS templates
This step is optional, vzctl is able to download templates on demand.
An OS template is a Linux distribution installed into a container and then packed into a gzipped tarball. Using such a cache, a new container can be created in a minute.
OpenvzKey="$(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 Downloads » Templates » 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
- Installation on Debian 7 very-old-stable (SystemV by default, supported)
- Installation on Debian 9