CentOS6.564位系统中安装Xen虚拟机

yum update

sed -i 's/SELINUX=enforcing/SELINUX=disabled/' /etc/selinux/config

reboot

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yum install bridge-utils

vi /etc/sysconfig/network-scripts/ifcfg-br0

DEVICE="br0"
NM_COnTROLLED="yes"
OnBOOT=yes
TYPE=Bridge
BOOTPROTO=none
IPADDR=IP地址
PREFIX=24 IP地址段
GATEWAY=IP网关
DNS1=8.8.8.8
DNS2=8.8.4.4
DEFROUTE=yes
IPV4_FAILURE_FATAL=yes
IPV6INIT=no
NAME="System br0"
vi /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE="eth0"
NM_COnTROLLED="yes"
OnBOOT=yes
TYPE="Ethernet"
UUID="跟原来文件里的一致"
HWADDR=跟原来文件里的一致
DEFROUTE=yes
IPV4_FAILURE_FATAL=yes
IPV6INIT=no
NAME="System eth0"
BRIDGE=br0
/etc/init.d/network restart

ifconfig

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

wget http://au1.mirror.crc.id.au/repo/kernel-xen-release-6-4.noarch.rpm

rpm -ivh kernel-xen-release-6-4.noarch.rpm

yum install xen-libs kernel-xen xen kernel-xen-devel virt-manager bridge-utils libvirt libvirt-python python-virtinst gcc-c++

vi /boot/grub/menu.lst  查看xen内核引导应该是这样：

title CentOS (2.6.32.57-2.el6xen.x86_64)
        root (hd0,0)
        kernel /vmlinuz-2.6.32.57-2.el6xen.x86_64 ro root=/dev/mapper/vg_server1-LogVol00 rd_NO_LUKS LANG=en_US.UTF-8 rd_NO_MD SYSFOnT=latarcyrheb-sun16 crashkernel=auto  KEYBOARDTYPE=pc KEYTABLE=de rd_LVM_LV=vg_server1/LogVol01 rd_LVM_LV=vg_server1/LogVol00 rd_NO_DM rhgb quiet
        initrd /initramfs-2.6.32.57-2.el6xen.x86_64.img
改成
title CentOS (2.6.32.57-2.el6xen.x86_64)
        root (hd0,0)
        kernel /xen.gz dom0_mem=512M cpufreq=xen
        module /vmlinuz-2.6.32.57-2.el6xen.x86_64 ro root=/dev/mapper/vg_server1-LogVol00 rd_NO_LUKS LANG=en_US.UTF-8 rd_NO_MD SYSFOnT=latarcyrheb-sun16 crashkernel=auto  KEYBOARDTYPE=pc KEYTABLE=de rd_LVM_LV=vg_server1/LogVol01 rd_LVM_LV=vg_server1/LogVol00 rd_NO_DM rhgb quiet
        module /initramfs-2.6.32.57-2.el6xen.x86_64.img

（网上很多文章，在 cpufreq=xen  后面都有 dom0_max_vcpus=1 dom0_vcpus_pin  测试发现，原来服务器上有8核的cpu，但是 cat /proc/cpuinfo 只能看到一个CPU了。去掉后，才恢复正常）

修改 default=1 为 default=0，从xen内核启动

reboot
uname -r 查看是否xen内核

pstree -p | grep xen 查看xen是否安装好

        |-xenconsoled(3062)---{xenconsoled}(3063)
|-xend(3071)-+-{xend}(3072)
|            |-{xend}(3073)
|            |-{xend}(3117)
|            |-{xend}(3118)
|            |-{xend}(3119)
|            |-{xend}(3120)
|            `-{xend}(3121)
        |-xenstored(3053)
`-xenwatchdogd(2934)