How To Create OpenVZ Virtual Machines (VPS)

How do I create OpenVZ virtual machine (VPS) to run CentOS or Debian as VPS?

OpenVZ comes with a template for each VPS or virtual machine. OpenVZ provides templates for all leading Linux distributions. You need to download those templates in order to create a VPS. Visit this page to grab templates for vps.

Download Ubuntu Linux VPS

Type the following commands to download precreated Ubuntu Linux template:
# cd /vz/template/cache
# wget

Create VPS

Now you’ve download the template for your virtual machine. You can just start a VPS based on the template you have just downloaded, by typing the following commands:
# vzctl create 10 --ostemplate ubuntu-9.04-x86_64
vzctl set 10 --onboot yes --save
### Set IP for VPS ###
vzctl set 10 --ipadd --save
### Set Nameservers IP for VPS ###
vzctl set 10 --nameserver --save
vzctl set 10 --nameserver --save
### Set Hostname IP for VPS ###
vzctl set 10 --hostname --save
### Set Disk quota for VPS (10G min [soft] and 11G max hard limit) ###
vzctl set 10 --diskspace 10G:11G --save
### Okat let start it ###
vzctl start 10
### Set root user password for VPS ###
vzctl exec 10 passwd

vzctl is used to create and set various vps properties such as memory, disk usage and much more. Where,

  • create 10 : Your VPS ID.
  • –ostemplate ubuntu-9.04-x86_64 : VPS template.
  • –config vps.ubuntu: Save configuration.
  • set 10 : Set various option for VPS ID # 10.
  • –onboot yes : Make sure VPS boots automatically after a reboot.
  • –save : Save changes to config file.

Common OpenVZ Admin Tasks

vzctl act as a master tool for various tasks:

How Do I Set VPS Name to ?

# vzctl set 10 --hostname --save

How Do I Set VPS IP Address?

# vzctl set 10 --ipadd --save

How Do I Set VPS DNS Name Servers?

# vzctl set 10 --nameserver --save

How Do I Set Disk Quota?

# vzctl set 10 --diskspace SoftLimitG:HardLimitG --save
# vzctl set 10 --diskspace 10G:12G --save

How Do I Stop / Start / Restart VPS Servers?

# vzctl start 10
# vzctl restart 10
# vzctl stop 10

How Do I Run a Command For VPS?

You can run command as follows
# vzctl exec 10 w
# vzctl exec 10 df
# vzctl exec 10 date
# vzctl exec 10 ps aux

How Do I Login Into VPS Server (container)?

Type the following command
# vzctl enter 10
To exit, simply type:
# exit
You can remotely login to your VPS using a ssh client itself or using putty:
$ ssh

How Do I Destroy VPS?

Type the following command to delete VPS:
# vzctl destroy 10

Another Example: Creating a CentOS Linux VPS

Download CentOS 64 bit template:
# cd /vz/template/cache
# wget

Create a VPS and set various limits (see vzctl man page):
# vzctl create 11 --ostemplate centos-5-x86_64
# vzctl set 11 --quotaugidlimit 150 --numproc 400:400
--kmemsize 16384000:18022400 --privvmpages 262144:292912 --diskspace 2000000:2000000
--shmpages 16384:16384 --ipadd
--nameserver --nameserver --save
# vzctl set 11 --onboot yes --save

Set the password for vps root user:
# vzctl set 11 --userpasswd root:pass
Start VPS:
# vzctl start 11
Enter into VPS:
# vzctl enter 11
Now you can install additional software and configure your vps:
[vps #] yum update
[vps #] yum install httpd

This entry is 3 of 5 in the RHEL / CentOS Linux OpenVZ Virtualization Tutorial series. Keep reading the rest of the series:

  1. How To Setup OpenVZ under RHEL / CentOS Linux
  2. CentOS Linux Install OpenVZ Virtualization Software
  3. How To Create OpenVZ Virtual Machines (VPS)
  4. OpenVZ Iptables: Allow Traffic To Pass Via venet0 To All VPS
  5. OpenVZ Virtual Machine (VPS) Management

Posted by: SXI ADMIN

The author is the creator of SXI LLC and a seasoned sysadmin, DevOps engineer, and a trainer for the Linux operating system/Unix shell scripting. Get the latest tutorials on SysAdmin, Linux/Unix and open source topics via RSS/XML feed or weekly email newsletter.

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