Get Virtualizor

Installing Softaculous Virtualizor for Xen is very simple.


  • CentOS 6.x/7.x or Red Hat Enterprise Linux 5.x or Scientific Linux 5.x or Ubuntu 12.04 or Ubuntu 14.04 (x86 or x86_64)
  • yum / apt-get
  • Storage to create the VPS (DomUs) disks

Notes :
1. If you want full virtualization then your CPU must support the same

Partition Scheme

Partition Size Description
/ 80-100 GB Root partition containing all Hardware Node operating system files, OS templates and ISOs
SWAP 4 GB Paging partition for the Linux operating system
Storage All the remaining space on the hard disk This partition can be used to create either Logical Volumes or File Based Storage for the VPS (DomUs).
NOTE for LVM : You must NOT create any Logical Volume and MOUNT it. This must be an EMPTY VOLUME GROUP.
Virtualizor will not delete any pre-existing LVs in the Volume Group. But its recommended to have an empty Volume Group.

NOTE for File Storage : You must create and mount the folder. Also for Xen HVM, you need to enable XL support from Configuration->Slave settings.

Supported storage types

( LVM | File | Thin LVM | ZFS | ZFS Thin | ZFS Compressed | ZFS Thin Compressed )


Open a Shell Terminal (e.g. PuTTY) and SSH to your server. Run the following commands:

wget -N
chmod 0755
./ kernel=xen

Please give the email address correctly !

Installation Parameters

  • email - The Admin Email Address
  • kernel - In this case its xen
  • noos - If you don't want to download the DomU operating system for the DomU then please add noos=true as a parameter
  • beta - If there is a newer version of Virtualizor available and you would like to test it then please add beta=true as a parameter
  • lvg (optional) - If you are going to use LVM for the VPS storage. The Volume Group that will be used for the DomU (VPS) storage e.g. defaults to vg. It should have some OR ALL unallocated space to create LVMs for the VPS.
  • license - In case you are installing Virtualizor on internal network you will need to provide the VALID license key. To get internal license key you will need to open a support ticket.

The installation will begin immediately. It may seem that the installation has stopped, if your network speed is slow, but please let it continue. You will see something like this :

After the installation is completed you will be asked to reboot.

You can then visit the Admin Panel to create the Storage and the Virtual Servers and also manage your server.

Note : A log file of the installation process will be created - /root/virtualizor.log


To login to the Softaculous Virtualizor Admin Panel, visit the following URL :


Login with the servers root details.

Admin Panel

After you login, you will see the Admin Panel Dashboard :

Create Storage

Before creating any VMs, its necessary to define your storage.
Navigate to Virtualizor Admin Panel -> Storage -> Add Storage
You will see the following wizard :

Fill in the details and define the storage.

Domain-0 Memory

It is very important that you set the Domain-0 (Hardware Node) memory in the GRUB so that there is no memory balloning of Domain-0 causing a lack of RAM for the virtaul servers. You can do that by editing /etc/grub.conf and adding dom0_mem=512M. An example is as follows :

title CentOS (2.6.18-194.26.1.el5xen)
	root (hd0,0)
	kernel /boot/xen.gz-2.6.18-194.26.1.el5 dom0_mem=512M
	module /boot/vmlinuz-2.6.18-194.26.1.el5xen ro root=LABEL=/1
	module /boot/initrd-2.6.18-194.26.1.el5xen.img

You can also set the memory anytime :

xm mem-set Domain-0 512


Virtualizor uses ports from 4081 - 4085. If there is any firewall restricting this, you will need to allow these ports.

For RHEL & CentOS < 7

iptables -I INPUT 1 -p tcp -m tcp --dport 4081:4085 -j ACCEPT
iptables -I INPUT 2 -p tcp -m tcp --dport 5900:6000 -j ACCEPT

For RHEL & CentOS 7+

firewall-cmd --zone=public --permanent --add-port=4081-4085/tcp
firewall-cmd --zone=public --permanent --add-port=5900-6000/tcp 
NOTE: If you are going to use Webuzo templates for VM creation, please allow ports 2002-2005

Trouble Shoot

NOTE : In all cases please remember to disable SElinux. The Virtualizor installer will try to disable it. For xen HVM make sure VT is enabled from the bios or you will not be able to see HVM check Box .

Cant open http://IP-Address:4084

Please check if your iptables firewall is running You can disable it with the following command if even after allowing ports, the panel is not working :

root> service iptables stop

For CentOS 7 :
root> systemctl stop firewalld

Server boot issues

If the server hangs on a black screen with a blinking prompt then you can use this guide :

Booted into wrong kernel

If you get the error as booted into wrong kernel after fresh installation. Go to Admin Panel -> Configuration -> Slave Settings -> Enable "Use XL" setting and Save the configuration. It should resolve the issue of booted into wrong kernel.

Virtualizor Network in XEN ubuntu

Virtualizor will create a viifbr0 bridge.

viifbr0 detects the IP, Netmask, GATEWAY from interface eth0 is default. You can change it from configuration from admin panel as per your requirement:

Hence if you change the above file, you will need to restart the virtualizor network :

root> service virtnetwork restart

Note : The above command will restart the server's entire network.

Start Command :

root> service virtnetwork start

Stop Command :

root> service virtnetwork stop
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