Assumptions

• SELinux is disabled
• Firewall is disabled
• Containers are on the same subnet as the physical host

Installation Steps

Install the OpenVZ yum repo and ensure it points to the right repo (RHLE6)

wget -O /etc/yum.repos.d/openvz.repo http://download.openvz.org/openvz.repo
rpm --import http://download.openvz.org/RPM-GPG-Key-OpenVZ
vi openvz.repo

Install the OpenVZ kernel. Ensure it is the 1st option in GRUB

yum install vzkernel
vi /boot/grub/menu.lst

Install the OpenVZ utilities

yum install vzctl vzquota

Tune /etc/sysctl.conf

net.ipv4.ip_forward = 1
net.ipv4.conf.default.proxy_arp = 0
net.ipv4.conf.all.rp_filter = 1
kernel.sysrq = 1
net.ipv4.conf.default.send_redirects = 1
net.ipv4.conf.all.send_redirects = 0
net.ipv4.icmp_echo_ignore_broadcasts=1
net.ipv4.conf.default.forwarding=1

Create vmbr0 bridge (optional)

If you are planning on using VETH in containers you will need a bridge interface.

Create vmbr0

# cat /etc/sysconfig/network-scripts/ifcfg-vmbr0
DEVICE="vmbr0"
BOOTPROTO="static"
IPV6INIT="no"
ONBOOT="yes"
TYPE="Bridge"
DELAY=0
IPADDR=192.168.1.99
NETMASK=255.255.255.0
GATEWAY=192.168.1.1

Add eth0 to vmbr0

# cat /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE="eth0"
ONBOOT="yes"
IPV6INIT="no"
TYPE="Ethernet"
BRIDGE="vmbr0"

Create /etc/vz/vznet.conf with this content

#!/bin/bash
EXTERNAL_SCRIPT="/usr/sbin/vznetaddbr"

This will automatically attach/detach the container's veth interface to/from vmbr0 on container's startup/shutdown.

Done. Reboot