Workload Balancing. Supplemental Guides. Common Criteria. Third Party Notices. Document History. Aviso legal. This article guides you through the installation of Citrix XenServer 7.
It also contains information about troubleshooting problems that might occur during installation and points you to additional resources. This article is primarily aimed at system administrators who wish to set up XenServer hosts on physical servers. XenServer 7. There is no supported direct upgrade path from out-of-support versions of XenServer to XenServer 7.
Instead, perform a fresh installation. If you are updating an existing installation of XenServer 7. You can download this file from the download site. Review the information in Update your hosts before updating your XenServer installation. This section steps through installing the XenServer host software on physical servers, installing XenCenter on Windows workstations and finally connecting them to form the infrastructure for creating and running Virtual Machines VMs.
After guiding you through installation, this section describes a selection of common installation and deployment scenarios. XenServer installs directly on bare-metal hardware avoiding the complexity, overhead, and performance bottlenecks of an underlying operating system. It uses the device drivers available from the Linux kernel. As a result, XenServer can run on a wide variety of hardware and storage devices.
The Xen Hypervisor : The hypervisor is the basic abstraction layer of software. The hypervisor is responsible for low-level tasks such as CPU scheduling and is responsible for memory isolation for resident VMs. The hypervisor abstracts from the hardware for the VMs. The hypervisor has no knowledge of networking, external storage devices, video, etc. Besides providing XenServer management functions, the Control Domain also runs the driver stack that provides user created Virtual Machines VMs access to physical devices.
The management toolstack : Also known as xapi, this software toolstack controls VM lifecycle operations, host and VM networking, VM storage, user authentication, and allows the management of XenServer resource pools. Do not install any other operating system in a dual-boot configuration with the XenServer host; this is an unsupported configuration.
Installers for both the XenServer host and XenCenter are located on the installation media. The installation media also includes the Readme First, which provides descriptions of and links to helpful resources, including product documentation for XenServer and XenCenter components.
While an installer for XenCenter is included in the installation media, more recent versions of XenCenter are provided as a separate download on the XenServer 7. We recommend that you get the latest version of XenCenter from this page.
The latest version of XenCenter supersedes the previous versions. To download the installer, visit the XenServer Downloads page. The main XenServer installation file contains the basic packages required to set up XenServer on your host. You can install any required supplemental pack after installing XenServer. Download the supplemental pack filename. The installer presents the option to upgrade if it detects a previously installed version of XenServer.
The upgrade process follows the first-time installation process, but several setup steps are bypassed. The existing settings are retained, including networking configuration, system time and so on. Upgrading requires careful planning and attention.
For detailed information about upgrading individual XenServer hosts and pools, see Upgrading XenServer. Throughout the installation, quickly advance to the next screen by pressing F Use Tab to move between elements, and Space or Enter to select.
For general help, press F1. Installing XenServer overwrites data on any hard drives that you select to use for the installation. Back up data that you wish to preserve before proceeding. Following the initial boot messages and the Welcome to XenServer screen, select your keymap keyboard layout for the installation. If a System Hardware warning screen is displayed and hardware virtualization assist support is available on your system, see your hardware manufacturer for BIOS upgrades.
XenServer ships with a broad driver set that supports most modern server hardware configurations. The type is determine by the type of storage repository.
These VBD objects can be attached to virtual guests which then allows the guest machine to access the data stored in that particular VDI on a respective SR.
Much like networking in XenServer, reading about storage is one thing but being able to see the relationship amongst each of these items often solidifies the concepts. The common diagrams used to represent XenServer storage concepts often confuses newer people as the diagrams are often read in a linear fashion. Below is one such image borrowed from Citrix.
Many individuals read this linearly from left to right thinking that each part is a separate physical device. The graphic below attempts to explain the concepts in a less linear but more pragmatic manner.
The second image is an attempt to show the logical connections PBD and VBD that are used to connect XenServers and guests to remote storage over one actual network connection. With the conceptualization out of the way; the configuration can begin. Recalling from the first article in this series, this guide is using a Dell PSE iSCSI storage device for the storage of the virtual machine guests disks.
This is very important and is needed to determine the SCSIid for the storage repository. With this new information, the prior command can be modified to obtain the SCSIid. The only thing added to the command is the targetIQN stanza. By issuing this new command, the system will respond with the last piece of information needed to create an iSCSI Storage Repository.
That last piece of information is the SCSI id. Creating the Storage Repository from the combined information is done as follows:. The UUID output is a great sign! As with all system administration tasks, it is always a good idea to confirm that the command was successful. The next series of steps walks through the process of creating an ISO library.
ISO files are typically images of compact disk CD installation media. By having a special storage repository created for these ISO files, the installation of new guests can be done very quickly. When an administrator wishes to create a new guest, they can simply select one of the ISO files that exist in this ISO library rather than having to put a CD physically in a XenServer in the pool.
The next steps will be the creation of virtual machines and connecting those systems to the proper networks from the earlier networking article. TecMint is the fastest growing and most trusted community site for any kind of Linux Articles, Guides and Books on the web.
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