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http://www.xen.org/

What is Xen?

============

Xen is a Virtual Machine Monitor (VMM) originally developed by the

Systems Research Group of the University of Cambridge Computer

Laboratory, as part of the UK-EPSRC funded XenoServers project.  Xen

is freely-distributable Open Source software, released under the GNU

GPL. Since its initial public release, Xen has grown a large

development community, spearheaded by xen.org (http://www.xen.org).

The 4.1 release offers excellent performance, hardware support and

enterprise-grade features such as x86_32-PAE, x86_64, SMP guests and

live relocation of VMs. Ports to Linux, NetBSD, FreeBSD and Solaris

are available from the community.

This file contains some quick-start instructions to install Xen on

your system. For full documentation, see the Xen User Manual. If this

is a pre-built release then you can find the manual at:

 dist/install/usr/share/doc/xen/pdf/user.pdf

If you have a source release, then 'make -C docs' will build the

manual at docs/pdf/user.pdf.

Quick-Start Guide

=================

First, there are a number of prerequisites for building a Xen source

release. Make sure you have all the following installed, either by

visiting the project webpage or installing a pre-built package

provided by your OS distributor:

    * GCC v3.4 or later

    * GNU Make

    * GNU Binutils

    * Development install of zlib (e.g., zlib-dev)

    * Development install of Python v2.3 or later (e.g., python-dev)

    * Development install of curses (e.g., libncurses-dev)

    * Development install of openssl (e.g., openssl-dev)

    * Development install of x11 (e.g. xorg-x11-dev)

    * Development install of uuid (e.g. uuid-dev)

    * bridge-utils package (/sbin/brctl)

    * iproute package (/sbin/ip)

    * hotplug or udev

    * GNU bison and GNU flex

    * GNU gettext

    * 16-bit x86 assembler, loader and compiler (dev86 rpm or bin86 & bcc debs)

    * ACPI ASL compiler (iasl)

Second, you need to acquire a suitable kernel for use in domain 0. If

possible you should use a kernel provided by your OS distributor. If

no suitable kernel is available from your OS distributor then refer to

http://wiki.xen.org/xenwiki/XenDom0Kernels for suggestions for

suitable kernels to use.

If you are looking to compile a Dom0 kernel from source, please refer to

http://wiki.xensource.com/xenwiki/XenParavirtOps.

[NB. Unless noted otherwise, all the following steps should be

performed with root privileges.]

1. Download and untar the source tarball file. This will be a

   file named xen-unstable-src.tgz, or xen-$version-src.tgz.

   You can also pull the current version from the mercurial

   repository at http://xenbits.xen.org/

    # tar xzf xen-unstable-src.tgz

   Assuming you are using the unstable tree, this will

   untar into xen-unstable. The rest of the instructions

   use the unstable tree as an example, substitute the

   version for unstable.

2. cd to xen-unstable (or whatever you sensibly rename it to).

3. For the very first build, or if you want to destroy build trees,

   perform the following steps:

    # make world

    # make install

   This will create and install onto the local machine. It will build

   the xen binary (xen.gz), the tools and the documentation.

   You can override the destination for make install by setting DESTDIR

   to some value.

4. To rebuild an existing tree without modifying the config:

    # make dist

   This will build and install xen, tools, and docs into the local dist/

   directory.

   You can override the destination for make install by setting DISTDIR

   to some value.

   make install and make dist differ in that make install does the

   right things for your local machine (installing the appropriate

   version of hotplug or udev scripts, for example), but make dist

   includes all versions of those scripts, so that you can copy the dist

   directory to another machine and install from that distribution.

Python Runtime Libraries

========================

Xend (the Xen daemon) has the following runtime dependencies:

    * Python 2.3 or later.

      In some distros, the XML-aspects to the standard library

      (xml.dom.minidom etc) are broken out into a separate python-xml package.

      This is also required.

      In more recent versions of Debian and Ubuntu the XML-aspects are included

      in the base python package however (python-xml has been removed

      from Debian in squeeze and from Ubuntu in intrepid).

          URL:    http://www.python.org/

          Debian: python

    * For optional SSL support, pyOpenSSL:

          URL:    http://pyopenssl.sourceforge.net/

          Debian: python-pyopenssl

    * For optional PAM support, PyPAM:

          URL:    http://www.pangalactic.org/PyPAM/

          Debian: python-pam

    * For optional XenAPI support in XM, PyXML:

          URL:    http://codespeak.net/lxml/

	  Debian: python-lxml

          YUM:    python-lxml

Intel(R) Trusted Execution Technology Support

=============================================

Intel's technology for safer computing, Intel(R) Trusted Execution Technology

(Intel(R) TXT), defines platform-level enhancements that provide the building

blocks for creating trusted platforms.  For more information, see

http://www.intel.com/technology/security/.

Intel(R) TXT support is provided by the Trusted Boot (tboot) module in

conjunction with minimal logic in the Xen hypervisor.

Tboot is an open source, pre- kernel/VMM module that uses Intel(R) TXT to

perform a measured and verified launch of an OS kernel/VMM.

The Trusted Boot module is available from

http://sourceforge.net/projects/tboot.  This project hosts the code in a

mercurial repo at http://tboot.sourceforge.net/hg/tboot.hg and contains

tarballs of the source.  Instructions in the tboot README describe how

to modify grub.conf to use tboot to launch Xen.

There are optional targets as part of Xen's top-level makefile that will

download and build tboot: install-tboot, build-tboot, dist-tboot, clean-tboot.

These will download the latest tar file from the SourceForge site using wget,

then build/install/dist according to Xen's settings.