xen目前还是RHEL/CentOS/OEL5.X支持情况比较好。RHEL6.X就默认不支持了，但是也可以通过安装xen的源进行安装。本文采用OEL5.8 x64进行环境配置。今后将发布一个系列的纯文本配置xen实战配置文章，这里不讨论半虚拟化，完全虚拟化等概念，只讲实战，以此对xen学习做一个总结。
xen虚拟化实战系列文章列表
xen虚拟化实战系列(一)之xen虚拟化环境安装
xen虚拟化实战系列(二)之xen虚拟机安装
xen虚拟化实战系列(三)之xen虚拟机复制
xen虚拟化实战系列(四)之xen虚拟机扩展磁盘空间一法
xen虚拟化实战系列(五)之xen虚拟机扩展磁盘空间再一法
xen虚拟化实战系列(六)之xen虚拟机破解密码
xen虚拟化实战系列(七)之xen虚拟机VNC访问配置
xen虚拟化实战系列(八)之xen虚拟机开机自启动配置
xen虚拟化实战系列(九)之xen虚拟机时间配置
xen虚拟化实战系列(十)之xen虚拟机双网卡配置
xen虚拟化实战系列(十一)之xen虚拟机磁盘文件挂载
xen虚拟化实战系列(十二)之xen虚拟机高可用之在线迁移
xen虚拟化实战系列(十三)之xen虚拟机集中管理之convirt
CentOS6.x安装xen4.2虚拟化实践
http://koumm.blog.51cto.com/703525/1536666
1. 操作系统安装
采用OEL5.8 X64安装，安装过程中选中图形界面，开发包，开发库，老的软件开发包等，其它都不选。
OEL下载地址大全: http://koumm.blog.51cto.com/703525/1283801
# uname -a
Linux oradb 2.6.18-308.el5 #1 SMP Sat Feb 25 12:40:07 EST 2012 x86_64 x86_64 x86_64 GNU/Linux
2. 配置yum源
说明：通过安装源进行安装是最简单的。
# cd /etc/yum.repos.d
# wget http://public-yum.oracle.com/public-yum-el5.repo
# vi public-yum-el5.repo
#将对应的enable改为1,如下图所示
Oracle Enterprise linux(OEL)官方yum源配置
http://koumm.blog.51cto.com/703525/1283867
3. yum安装xen
# yum install kernel-xen xen-libs xen virt-viewer
Loaded plugins: rhnplugin, security This system is not registered with ULN. ULN support will be disabled. el5_latest | 1.4 kB 00:00 el5_latest/primary | 16 MB 01:20 el5_latest 11750/11750 ol5_UEK_base | 1.2 kB 00:00 ol5_UEK_base/primary | 685 kB 00:03 ol5_UEK_base 28/28 Setting up Install Process Resolving Dependencies --> Running transaction check ---> Package kernel-xen.x86_64 0:2.6.18-348.16.1.0.1.el5 set to be installed ---> Package virt-viewer.x86_64 0:0.0.2-3.el5 set to be updated --> Processing Dependency: libvirt.so.0(LIBVIRT_0.0.3)(64bit) for package: virt-viewer --> Processing Dependency: libvirt.so.0(LIBVIRT_0.0.5)(64bit) for package: virt-viewer --> Processing Dependency: libgtk-vnc-1.0.so.0()(64bit) for package: virt-viewer --> Processing Dependency: libvirt.so.0()(64bit) for package: virt-viewer ---> Package xen.x86_64 0:3.0.3-142.el5_9.3 set to be updated --> Processing Dependency: python-virtinst for package: xen --> Processing Dependency: bridge-utils for package: xen --> Processing Dependency: libSDL-1.2.so.0()(64bit) for package: xen ---> Package xen-libs.i386 0:3.0.3-142.el5_9.3 set to be updated --> Processing Dependency: libext4fs.so.2 for package: xen-libs --> Processing Dependency: liblzma.so.0 for package: xen-libs ---> Package xen-libs.x86_64 0:3.0.3-142.el5_9.3 set to be updated --> Processing Dependency: libext4fs.so.2()(64bit) for package: xen-libs --> Running transaction check ---> Package SDL.x86_64 0:1.2.10-9.el5 set to be updated ---> Package bridge-utils.x86_64 0:1.1-3.el5 set to be updated ---> Package e4fsprogs-libs.i386 0:1.41.12-3.el5 set to be updated ---> Package e4fsprogs-libs.x86_64 0:1.41.12-3.el5 set to be updated ---> Package gtk-vnc.x86_64 0:0.3.8-3.el5 set to be updated ---> Package libvirt.x86_64 0:0.8.2-29.0.1.el5_9.1 set to be updated --> Processing Dependency: cyrus-sasl-md5 for package: libvirt --> Processing Dependency: ebtables for package: libvirt ---> Package python-virtinst.noarch 0:0.400.3-13.0.1.el5 set to be updated --> Processing Dependency: libvirt-python >= 0.2.1 for package: python-virtinst ---> Package xz-libs.i386 0:4.999.9-0.3.beta.20091007git.el5 set to be updated --> Running transaction check ---> Package cyrus-sasl-md5.x86_64 0:2.1.22-7.el5_8.1 set to be updated --> Processing Dependency: cyrus-sasl-lib = 2.1.22-7.el5_8.1 for package: cyrus-sasl-md5 ---> Package ebtables.x86_64 0:2.0.9-5.el5 set to be updated ---> Package libvirt-python.x86_64 0:0.8.2-29.0.1.el5_9.1 set to be updated --> Running transaction check --> Processing Dependency: cyrus-sasl-lib = 2.1.22-5.el5_4.3 for package: cyrus-sasl --> Processing Dependency: cyrus-sasl-lib = 2.1.22-5.el5_4.3 for package: cyrus-sasl-devel --> Processing Dependency: cyrus-sasl-lib = 2.1.22-5.el5_4.3 for package: cyrus-sasl-devel --> Processing Dependency: cyrus-sasl-lib = 2.1.22-5.el5_4.3 for package: cyrus-sasl-plain --> Processing Dependency: cyrus-sasl-lib = 2.1.22-5.el5_4.3 for package: cyrus-sasl-plain ---> Package cyrus-sasl-lib.i386 0:2.1.22-7.el5_8.1 set to be updated ---> Package cyrus-sasl-lib.x86_64 0:2.1.22-7.el5_8.1 set to be updated --> Running transaction check ---> Package cyrus-sasl.x86_64 0:2.1.22-7.el5_8.1 set to be updated ---> Package cyrus-sasl-devel.i386 0:2.1.22-7.el5_8.1 set to be updated ---> Package cyrus-sasl-devel.x86_64 0:2.1.22-7.el5_8.1 set to be updated ---> Package cyrus-sasl-plain.i386 0:2.1.22-7.el5_8.1 set to be updated ---> Package cyrus-sasl-plain.x86_64 0:2.1.22-7.el5_8.1 set to be updated --> Finished Dependency Resolution Dependencies Resolved =============================================================================================================================== Package Arch Version Repository Size =============================================================================================================================== Installing: kernel-xen x86_64 2.6.18-348.16.1.0.1.el5 el5_latest 23 M virt-viewer x86_64 0.0.2-3.el5 el5_latest 25 k xen x86_64 3.0.3-142.el5_9.3 el5_latest 1.9 M xen-libs i386 3.0.3-142.el5_9.3 el5_latest 177 k xen-libs x86_64 3.0.3-142.el5_9.3 el5_latest 175 k Installing for dependencies: SDL x86_64 1.2.10-9.el5 el5_latest 213 k bridge-utils x86_64 1.1-3.el5 el5_latest 30 k cyrus-sasl-md5 x86_64 2.1.22-7.el5_8.1 el5_latest 47 k e4fsprogs-libs i386 1.41.12-3.el5 el5_latest 108 k e4fsprogs-libs x86_64 1.41.12-3.el5 el5_latest 105 k ebtables x86_64 2.0.9-5.el5 el5_latest 104 k gtk-vnc x86_64 0.3.8-3.el5 el5_latest 80 k libvirt x86_64 0.8.2-29.0.1.el5_9.1 el5_latest 3.2 M libvirt-python x86_64 0.8.2-29.0.1.el5_9.1 el5_latest 239 k python-virtinst noarch 0.400.3-13.0.1.el5 el5_latest 384 k xz-libs i386 4.999.9-0.3.beta.20091007git.el5 el5_latest 100 k Updating for dependencies: cyrus-sasl x86_64 2.1.22-7.el5_8.1 el5_latest 1.2 M cyrus-sasl-devel i386 2.1.22-7.el5_8.1 el5_latest 1.4 M cyrus-sasl-devel x86_64 2.1.22-7.el5_8.1 el5_latest 1.4 M cyrus-sasl-lib i386 2.1.22-7.el5_8.1 el5_latest 126 k cyrus-sasl-lib x86_64 2.1.22-7.el5_8.1 el5_latest 130 k cyrus-sasl-plain i386 2.1.22-7.el5_8.1 el5_latest 27 k cyrus-sasl-plain x86_64 2.1.22-7.el5_8.1 el5_latest 27 k Transaction Summary =============================================================================================================================== Install 16 Package(s) Upgrade 7 Package(s) Total download size: 34 M Is this ok [y/N]: Running rpm_check_debug Running Transaction Test Finished Transaction Test Transaction Test Succeeded Running Transaction Updating : cyrus-sasl-lib 1/30 Updating : cyrus-sasl 2/30 Installing : bridge-utils 3/30 Installing : cyrus-sasl-md5 4/30 Updating : cyrus-sasl-plain 5/30 Installing : e4fsprogs-libs 6/30 Installing : xen-libs 7/30 Installing : gtk-vnc 8/30 Installing : ebtables 9/30 Installing : libvirt 10/30 Installing : libvirt-python 11/30 Installing : SDL 12/30 Updating : cyrus-sasl-lib 13/30 Installing : xz-libs 14/30 Updating : cyrus-sasl-plain 15/30 Installing : e4fsprogs-libs 16/30 Installing : python-virtinst 17/30 Installing : kernel-xen 18/30 Installing : xen 19/30 Installing : virt-viewer 20/30 Installing : xen-libs 21/30 Updating : cyrus-sasl-devel 22/30 Updating : cyrus-sasl-devel 23/30 Cleanup : cyrus-sasl-plain 24/30 Cleanup : cyrus-sasl 25/30 Cleanup : cyrus-sasl-lib 26/30 Cleanup : cyrus-sasl-devel 27/30 Cleanup : cyrus-sasl-devel 28/30 Cleanup : cyrus-sasl-plain 29/30 Cleanup : cyrus-sasl-lib 30/30 Installed: kernel-xen.x86_64 0:2.6.18-348.16.1.0.1.el5 virt-viewer.x86_64 0:0.0.2-3.el5 xen.x86_64 0:3.0.3-142.el5_9.3 xen-libs.i386 0:3.0.3-142.el5_9.3 xen-libs.x86_64 0:3.0.3-142.el5_9.3 Dependency Installed: SDL.x86_64 0:1.2.10-9.el5 bridge-utils.x86_64 0:1.1-3.el5 cyrus-sasl-md5.x86_64 0:2.1.22-7.el5_8.1 e4fsprogs-libs.i386 0:1.41.12-3.el5 e4fsprogs-libs.x86_64 0:1.41.12-3.el5 ebtables.x86_64 0:2.0.9-5.el5 gtk-vnc.x86_64 0:0.3.8-3.el5 libvirt.x86_64 0:0.8.2-29.0.1.el5_9.1 libvirt-python.x86_64 0:0.8.2-29.0.1.el5_9.1 python-virtinst.noarch 0:0.400.3-13.0.1.el5 xz-libs.i386 0:4.999.9-0.3.beta.20091007git.el5 Dependency Updated: cyrus-sasl.x86_64 0:2.1.22-7.el5_8.1 cyrus-sasl-devel.i386 0:2.1.22-7.el5_8.1 cyrus-sasl-devel.x86_64 0:2.1.22-7.el5_8.1 cyrus-sasl-lib.i386 0:2.1.22-7.el5_8.1 cyrus-sasl-lib.x86_64 0:2.1.22-7.el5_8.1 cyrus-sasl-plain.i386 0:2.1.22-7.el5_8.1 cyrus-sasl-plain.x86_64 0:2.1.22-7.el5_8.1 Complete!
4. 修改启动列表，使用运行xen的内核启动系统
# vi /boot/grub/grub.conf
说明: yum安装后，grub菜单是自动安装好了。
5. reboot 自动进入xen组件的内核。
# reboot
6. 查看xen启动情况
默认xen服务开机自启动
[root@node1 ~]# chkconfig --list |grep xend
xend 0:off 1:off 2:on 3:on 4:on 5:on 6:off
xendomains 0:off 1:off 2:off 3:on 4:on 5:on 6:off
查看xen内核
[root@node1 ~]# uname -a
Linux node1 2.6.18-348.16.1.0.1.el5xen #1 SMP Tue Aug 20 13:57:31 PDT 2013 x86_64 x86_64 x86_64 GNU/Linux
查看xen情况
[root@node1 ~]# xm list
Name ID Mem(MiB) VCPUs State Time(s)
Domain-0 0 1744 1 r----- 32.8
到此xen虚拟化环境配置完毕，下面就开始安装虚拟机了。