Installing Softaculous Virtualizor for Xen

Xen Project runs in a more privileged CPU state than any other software on the machine.
Responsibilities of the hypervisor include memory management and CPU scheduling of all virtual machines (“domains”), and for launching the most privileged domain (“dom0”) – the only virtual machine which by default has direct access to hardware. From the dom0 the hypervisor can be managed and unprivileged domains (“domU”) can be launched.
The dom0 domain is typically a version of Linux or BSD. User domains may either be traditional operating systems, such as Microsoft Windows under which privileged instructions are provided by hardware virtualization instructions (if the host processor supports x86 virtualization, e.g., Intel VT-x and AMD-V),or para-virtualized operating systems whereby the operating system is aware that it is running inside a virtual machine, and so makes hypercalls directly, rather than issuing privileged instructions.Xen Project boots from a bootloader such as GNU GRUB, and then usually loads a paravirtualized host operating system into the host domain (dom0).

Requirements

• CentOS 5.x /6.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 :

• If you want full virtualization then your CPU must support the same.

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.

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-IP:4085/

http://Your-IP:4084/

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

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

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