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{{Warning|This document briefly article describes the steps needed to install legacy version of OpenVZ on your (RPM based) machine. For '''Debian''' based systems current version, see [[Installation on DebianQuick installation]].}}
<!--T:1-->This document is also available in briefly describes the following languages: [http://forum.openvz.org/index.php?t=tree&goto=35&#msg_35 French], [http://forum.openvz.org/index.php?t=tree&goto=1805&#msg_1805 German],[http://wiki.openvz.jp Japanese]steps needed to install '''legacy''' OpenVZ on your '''RHEL 6''' (CentOS 6,[[Quick_installation_(SpanishScientific Linux 6)|Spanish]]machine.
==Requirements = Filesystems ===It is recommended to use a separate partition for container's private directories (by default /vz/private/<veid>). The reason why you should do so is that if you wish to use OpenVZ per!--container disk quota, you won't be able to use usual Linux disk quotas on the same partition. Bear in mind, that perT:5-container quota in this context includes not only pure per-container quota, but also usual Linux disk quota used in containers, not on [[HN]].>
<pre>title Fedora Core (2.6.8!-022stab029.1) root (hd0,0) kernel /vmlinuz-2.6.8T:18-022stab029.1 ro root=/dev/sda5 quiet rhgb vga=0x31B initrd /initrd-2.6.8-022stab029.1.img</pre>Change <tt>Fedora Core</tt> {{Note|With vzctl 4.4 or newer there is no need to <tt>OpenVZ</tt> (just for clarity reasons, so the OpenVZ kernels will not be mixed up with non-OpenVZ ones)do manual configuration. Remove extra arguments from the kernel line, leaving only the <tt>root=...</tt> parameter. The modifed portion of <tt>/etc/grub.conf</tt> should look like this: <pre>title OpenVZ (2.6.8-022stab029.1) root (hd0,0) kernel /vmlinuz-2.6.8-022stab029.1 ro root=/dev/sda5 initrd /initrd-2Skip to [[#Tools_installation]].6.8-022stab029.1.img</pre> == Configuring ==}}
<!--T:19-->
Please make sure the following steps are performed before rebooting into OpenVZ kernel.
=== sysctl ===<!--T:20-->
<!--T:21-->
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.
<!--T:22-->
<pre>
# On Hardware Node we generally need
net.ipv4.conf.default.proxy_arp = 0
<!--T:23-->
# Enables source route verification
net.ipv4.conf.all.rp_filter = 1
<!--T:24-->
# Enables the magic-sysrq key
kernel.sysrq = 1
<!--T:25-->
# We do not want all our interfaces to send redirects
net.ipv4.conf.default.send_redirects = 1
</pre>
=== SELinux === SELinux should be disabled. To that effect, put the following line to <code>/etc/sysconfig/selinux</code>:<pre>SELINUX=disabled</pre> === Conntracks === {{Note|In OpenVZ kernels later than 2.6.8, connection tracking is enabled by default so skip this section.}} In the old (2.6.8!--based) OpenVZ kernels netfilter connection tracking for [[CT0]] is disabled by default. If you have a stateful firewall enabled on the host node (it is there by default on some distributions) you should either disable it, or enable connection tracking for [[CT0]]. To enable conntracks for CT0, add the following line to <code>/etc/modprobe.conf</code> fileT:<pre>options ip_conntrack ip_conntrack_enable_ve0=1</pre> == Rebooting into OpenVZ kernel == Now reboot the machine and choose "OpenVZ" on the boot loader menu. If the OpenVZ kernel has been booted successfully, proceed to installing the user26-level tools for OpenVZ. If you are installing on x86_64 CentOS or Fedora system, you may want to continue the setup process using the [[Install_OpenVZ_on_a_x86_64_system_Centos-Fedora|x86_64 guide]]. == Installing the utilities == OpenVZ needs some user-level tools installed. Those are: ; vzctl: A utility to control OpenVZ containers (create, destroy, start, stop, set parameters etc.); vzquota: A utility to manage quotas for containers. Mostly used indirectly (by vzctl). === Using yum === <pre># yum install vzctl vzquota</pre> If on the x86_64 platform you would probably want to:
<pre!--T:27--># yum install vzctlSELinux should be disabled.x86_64 vzquota.x86_64Put <code>SELINUX=disabled</code> to <code>/etc/sysconfig/selinux</precode>:
<!--T:28-->echo "SELINUX=== Using rpm ===disabled" > /etc/sysconfig/selinux
<pre!--T:30--># rpm {{Out|Before installing tools, please read about [[vzstats]] and opt-Uhv vzctl*out if you don't want to help the project.rpm vzquota*.rpm</pre>}}
== Starting Reboot into OpenVZ ==<!--T:33-->
== Download OS templates == <pre># /sbin/service vz start</pre!--T:35-->
== Next steps ==<!--T:38-->
<!--T:39-->OpenVZ is now set up on your machine. To load OpenVZ kernel by default, edit the default line Follow on to [[basic operations in the /boot/grub/grub.conf file to point to the OpenVZ kernel. For example, if the OpenVZ kernel is the first kernel mentioned in the file, put it as default 0. See man grub.conf for more detailsenvironment]] document.
[[Category: Installation]]
[[Category: HOWTO]]