When you set up NetScaler virtual appliance on XenServer, you must use the XenCenter client to install the first NetScaler virtual appliance. Subsequent virtual appliances can be added by using either the XenCenter client or Citrix Command Center.
The XenServer® product is a server virtualization platform that offers near bare-metal virtualization performance for virtualized server and client operating systems. XenServer uses the Xen® hypervisor to virtualize each server on which it is installed, enabling each server to host multiple virtual machines simultaneously.
The following figure shows the bare-metal solution architecture of NetScaler virtual appliance on XenServer.
Figure 1. NetScaler Virtual Appliance on XenServer
The bare-metal solution architecture has the following components:
- Hardware or physical layer:
- Physical hardware components including memory, CPU, network cards, and disk drives.
- Xen hypervisor:
- Thin layer of software that runs on top of the hardware. The Xen hypervisor gives each virtual machine a dedicated view of the hardware.
- Virtual machine:
- Operating system hosted on the hypervisor and appearing to the user as a separate physical computer. However, the machine shares physical resources with other virtual machines, and it is portable because the virtual machine is abstracted from physical hardware.
A NetScaler virtual machine, or virtual appliance, is installed on the Xen hypervisor and uses paravirtualized drivers to access storage and network resources. It appears to the users as an independent NetScaler appliance with its own network identity, user authorization and authentication capabilities, configuration, applications, and data. The paravirtualization technique enables the virtual machines and the hypervisor to work together to achieve high performance for I/O and for CPU and memory virtualization.
For more information about XenServer, see the XenServer documentation at http://support.citrix.com/product/xens/.
XenCenter® is a graphical virtualization-management interface for XenServer®, enabling you to manage servers, resource pools, and shared storage, and to deploy, manage, and monitor virtual machines from your Windows desktop machine.
Use XenCenter to install NetScaler virtual appliance on XenServer.
For more information about XenCenter, see the XenServer documentation at http://support.citrix.com/product/xens/.
Command Center is a management and monitoring solution for Citrix application networking products that include NetScaler, NetScaler virtual appliance, NetScaler Gateway Enterprise Edition, Citrix® Branch Repeater™, Branch Repeater VPX™, and Citrix Repeater™. Command Center enables network administrators and operations teams to manage, monitor, and troubleshoot the entire global application delivery infrastructure from a single, unified console.
This centralized management solution simplifies operations by providing administrators with enterprise-wide visibility and automating management tasks that need to be executed across multiple devices.
Command Center is available with Citrix NetScaler Enterprise and Platinum editions.
You can use Command Center to provision NetScaler virtual appliance on XenServer, and then you can manage and monitor the virtual appliances from Command Center.
Note: You must use the XenCenter client to manage XenServer. You cannot manage XenServer from Command Center.
For more information about Command Center, see the Command Center documentation.