How To Setup OpenVZ under RHEL / CentOS Linux

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OpenVZ is a container-based virtualization solution that allows you to create and manage multiple virtual environments on a single physical server. Here are the steps to set up OpenVZ under RHEL / CentOS Linux:

  1. Install the OpenVZ kernel and tools:
# yum install vzkernel vzctl vzquota
  1. Edit the /etc/sysctl.conf file and add the following lines to the end of the file:
net.ipv4.ip_forward = 1
net.ipv6.conf.default.forwarding = 1
net.ipv6.conf.all.forwarding = 1
  1. Reload the sysctl settings:
# sysctl -p
  1. Reboot the server to load the new kernel.
  2. Create a new virtual machine:
# vzctl create <vmid> --ostemplate <template>

Replace <vmid> with a unique ID for the virtual machine, and <template> with the name of the OpenVZ template to use.

  1. Start the virtual machine:
# vzctl start <vmid>
  1. Enter the virtual machine:
# vzctl enter <vmid>
  1. Configure the virtual machine as you would a physical server, installing and configuring any software or services that you need.
  2. Exit the virtual machine:
# exit
  1. Stop the virtual machine:
# vzctl stop <vmid>

You can repeat steps 5-10 to create and manage additional virtual machines. OpenVZ also provides a variety of tools and commands for managing virtual environments, such as vzlist to list all running virtual machines, vzctl status <vmid> to check the status of a virtual machine, and vzctl destroy <vmid> to delete a virtual machine. You can refer to the OpenVZ documentation for more information on how to use these tools and commands.

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