= Sarge-Dapper (OldStable) =[This guide tells how to install the kernel and the tools on [Installation on http://www.debian.org Debian (sarge)]]Stable.

=Build your own kernel= Requirements == === Filesystems ===It is recommended to use a separate partition for VEs private directories (by default /var/lib/vz/private/<veid>). The reason why you should do so is that if you wish to use OpenVZ per-VE disk quota, you won't be able to use usual Linux disk quotas on the same partition. Bear in mind, that per-VE quota in this context includes not only pure per-VE quota, but also usual Linux disk quota used in VE, not on [[HN]]. At least try to avoid using root partition for VEs, because the root user of VE will be able to overcome 5% disk space barrier in some situations. This way HN root partition can be completely filled and it will break the system. OpenVZ per-VE disk quota is supported only for ext2/ext3 filesystems. So use one of these filesystems (ext3 is recommended) if you need per-VE disk quota.  === Repository setup === At the moment two different repositories are online at http://download.openvz.org :  Ola Lundqvist <opal@debian.org> "OpenVZ Kernels only" --> apt-uri [http://download.openvz.org/debian http://download.openvz.org/debian]   Thorsten Schiffedecker <tsd@debian.systs.org> --> apt-uri [http://download.openvz.org/debian-systs http://download.openvz.org/debian-image systs] (Mirror of OpenVZ Repository from http://debian way.systs.org)  {{Note|The next steps used the Repository at http://download.openvz.org/debian-systs, the actually OpenVZ Tools for Debian are exist only in unstable see http://packages.debian.org/vzctl }} {{Note|per default on ubuntu system, root task are done with [https://help.ubuntu.com/community/RootSudo sudo]}} This can be achieved by the following commands, as root or as privileged "sudo" user <pre># [sudo] echo "deb http://download.openvz.org/debian-systs etch openvz" >> /etc/apt/sources.list# wget http://download.openvz.org/debian-systs/dso_archiv_signing_key.asc# [sudo] apt-key add dso_archiv_signing_key.asc# [sudo] apt-get update</pre> == Kernel installation == {{Note|In case you want to recompile the OpenVZ kernel yourself on Debian, see [[Compiling the OpenVZ Kernel (the debian way)]].}} First, you need to choose what kernel you want to install. {| class="wikitable"|+'''OpenVZ Kernel list built with kernel config from openvz.org'''! kernel !! Description !! Hardware !! Debian Architektur|-! ovzkernel-2.6.18| uniprocessor| up to 4GB of RAM| i386 and amd64|-! ovzkernel-2.6.18-smp| symmetric multiprocessor| up to 4 GB of RAM| i386 and amd64|-! ovzkernel-2.6.18-enterprise| SMP + PAE support + 4/4GB split| up to 64 GB of RAM| i386 only|} {| class="wikitable"|+'''OpenVZ Kernel list built with official Debian Kernel Config and OpenVZ Settings'''! kernel !! Description !! Hardware !! Debian Architektur|-! fzakernel-2.6.18-686| uni- and multiprocessor| up to 4GB of RAM| i386|-! fzakernel-2.6.18-686-bigmem| symmetric multiprocessor| up to 64 GB of RAM| i386|-! fzakernel-2.6.18-amd64| uni- and multiprocessor| | amd64|-|} <pre> # apt-get install <kernel></pre>  === Configuring the bootloader === In case GRUB is used as the boot loader, it will be configured automatically: lines similar to these will be added to the <tt>/boot/grub/menu.lst</tt> file: <pre>[...] title Debian GNU/Linux, kernel 2.6.18-ovz-028stab051.1-686 root (hd0,1) kernel /vmlinuz-2.6.18-ovz-028stab051.1-686 root=/dev/sda5 ro vga=791 initrd /initrd.img-2.6.18-ovz-028stab051.1-686 savedefault[...]</pre> {{Note|per default on debian/ubuntu, a 2.6.22 kernel will boot before a 2.6.18, please check manually the grub boot order. See man update-grub for more details}} === Rebooting into OpenVZ kernel === {{Warning|Before you restart your Server, keep in mind, that your system has all needed modules enabled; booting from your harddisk (e.g. hardware modules, raid system(s), lvm2 etc). May you need a INITRD (initramdisk) or compile needed kernel modules statically in.}} Now reboot the machine and choose the OpenVZ Linux Kernel on the boot loader menu. If the OpenVZ kernel has been booted successfully, proceed to installing the user-level tools for OpenVZ.  == Installing the user-level tools == OpenVZ needs some user-level tools installed. Those are: ; vzctl: A utility to control OpenVZ VPSs (create, destroy, start, stop, set parameters etc.); vzquota: A utility to manage quotas for VPSs. Mostly used indirectly (by vzctl).  <pre> # [sudo] apt-get install vzctl vzquota</pre>  == Configuring == === sysctl === 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 is the relevant part of the file; please edit it accordingly. {{Note|vzctl version from debian-systs, automate changing sysctl options for openvz}} <pre>[...] # On Hardware Node we generally need# packet forwarding enabled and proxy arp disabled net.ipv4.conf.default.forwarding=1net.ipv4.conf.default.proxy_arp = 0 # Enables source route verificationnet.ipv4.conf.all.rp_filter = 1 # Enables the magic-sysrq keykernel.sysrq = 1 # TCP Explict Congestion Notification#net.ipv4.tcp_ecn = 0 # we do not want all our interfaces to send redirectsnet.ipv4.conf.default.send_redirects = 1net.ipv4.conf.all.send_redirects = 0 [...]</pre> {{Note|You can make a symlink from /var/lib/vz to /vz as backward compability to Main OpenVZ (Debian vz root directory is installed FHS-like to /var/lib/vz}}  # [sudo] ln -s /var/lib/vz /vz   === VE OS Templates === To install a VE, you need VE OS Template(s), precreated can be found [http://download.openvz.org/contrib/template/precreated/ here] or create it : [http://wiki.openvz.org/Debian_template_creation Debian] , [http://wiki.openvz.org/Ubuntu_Gutsy_template_creation ubuntu] and all infos about [http://wiki.openvz.org/Category:Templates Templates] {{Note|Setup your prefered standard OS Template : edit the /etc/vz/vz.conf}}  # [sudo] apt-get install vzctl-ostmpl-debian  == Additial user tools == ; vzprocps: A set of utilities to provide system information (vzps and vztop):; [http://wiki.openvz.org/Backup_of_a_running_VE_with_vzdump vzdump]: A utility to backup and restore VE.   # [sudo] apt-get install vzprocps vzdump  == Use it! == After installing the OpenVZ kernel, user tools and a Minimal VE OS Template create a first VE and do some [[Basic operations in OpenVZ environment]] and read the [[download:doc/OpenVZ-Users-Guide.pdf|doc/OpenVZ-Users-Guide.pdf]] and browse this wiki.