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Installing Softaculous Virtualizor for Xen is very simple.

Requirements

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.

Installation

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

wget -N http://files.virtualizor.com/install.sh
chmod 0755 install.sh
./install.sh email=your@email.com kernel=xen

Please give the email address correctly !

Installation Parameters

email – The Admin Email Address
kernel – In this case its xen
noos – If you dont 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

Login

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

https://Your-Server-IP:4085/

http://Your-Server-IP:4084/

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

Ports

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

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 :

root> service iptables stop

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

Start Command :

root> service virtnetwork start

Stop Command :

root> service virtnetwork stop

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