How To Setup OpenVZ under RHEL / CentOS Linux

How To Setup OpenVZ under RHEL / CentOS Linux

OpenVZ is an open-source container-based virtualization solution for Linux that allows you to create and manage multiple isolated environments on a single physical server. It is similar to other container-based virtualization solutions such as Docker and LXC, but offers a more comprehensive set of features and is generally more suitable for use in enterprise environments.

To set up OpenVZ on a RHEL or CentOS Linux system, you will need to follow these steps:

1. Install the required dependencies:

yum install kernel-vz-devel kernel-headers kernel-devel make

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2. Download the OpenVZ package from the official website and install it using the rpm command:

rpm -ivh openvz-release-7.el7.noarch.rpm

3. Install the OpenVZ kernel using the following command:

yum install vzkernel

4. Install the OpenVZ tools package using the following command:

yum install vzctl vzquota

5. Modify the /etc/sysctl.conf file and enable the required kernel parameters:

net.ipv4.ip_forward = 1
net.ipv4.conf.default.proxy_arp = 1
net.ipv4.conf.all.rp_filter = 1

6. Reload the kernel parameters using the following command:

sysctl -p

7. Modify the /etc/vz/vz.conf file and enable the required kernel parameters:

NEIGHBOUR_DEVS=all
NEIGHBOUR_DEVS_EXCLUDE=
NET_SCHED=none
VE_NET_KEEP_CFG=1
VE_NETNS=1

8. Modify the /etc/fstab file and enable the vzfs filesystem:

none /vz vzfs defaults 0 0

9. Create the /vz directory using the following command:

mkdir /vz

10. Enable the OpenVZ service using the following command:

systemctl enable vz

11. Start the OpenVZ service using the following command:

systemctl start vz

After following these steps, you should have a working OpenVZ installation on your RHEL or CentOS Linux system. You can then create and manage containers using the vzctl command.