This document briefly describes the steps needed to install OpenVZ on your RHEL 6 (CentOS 6, Scientific Linux 6) machine.
For Debian based systems, please see Installation on Debian.
This guide assumes you are running RHEL (CentOS, Scientific Linux) 6 on your system. Currently, this is a recommended platform to run OpenVZ on.
/vz file system
It is recommended to use a separate partition for containers (by default /vz) and format it to ext4.
Download openvz.repo file and put it to your
wget -P /etc/yum.repos.d/ http://ftp.openvz.org/openvz.repo
Import OpenVZ GPG key used for signing RPM packages:
rpm --import http://ftp.openvz.org/RPM-GPG-Key-OpenVZ
To make sure that you are downloading tamper free versions of the signed packages you should verify the fingerprint of the key you imported into the rpm key database as described on the Package signatures page.
Limited OpenVZ functionality is supported when you run a recent 3.x kernel (check vzctl for upstream kernel, so OpenVZ kernel installation is optional but still recommended.
# yum install vzkernel
|Note: With vzctl 4.4 or newer there is no need to do manual configuration. Skip to #Tools_installation.|
Please make sure the following steps are performed before rebooting into OpenVZ kernel.
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
SELinux should be disabled. Put
echo "SELINUX=disabled" > /etc/sysconfig/selinux
OpenVZ needs some user-level tools installed:
# yum install vzctl vzquota ploop
Reboot into OpenVZ
Now reboot the machine and choose "OpenVZ" on the boot loader menu (it should be default choice).
Download OS templates
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.
Download precreated template caches from Downloads » Templates » Precreated, or directly from download.openvz.org/template/precreated, or from one of the mirrors. Put those tarballs as-is (no unpacking needed) to the /vz/template/cache/ directory.
OpenVZ is now set up on your machine. Follow on to basic operations in OpenVZ environment document.