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

1. 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

1

Oracle Enterprise linux(OEL)官方yum源配置
http://koumm.blog.51cto.com/703525/1283867

1. yum安装xen

yum install kernel-xen xen-libs xen virt-viewer

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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!

1. 修改启动列表，使用运行xen的内核启动系统

vi /boot/grub/grub.conf

2
说明: yum安装后，grub菜单是自动安装好了。

1. reboot 自动进入xen组件的内核。

reboot

1. 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。