宿主机系统：Centos6.8
下面是安装过程记录：
1.操作系统环境安装
（1）修改内核模式为兼容内核启动
[[email protected] ~]# uname -a
Linux openstack 2.6.32-431.el6.x86_64 #1 SMP Fri Nov 22 03:15:09 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
[[email protected] ~]#vim /boot/grub/grub.conf
......
default=1 #由默认的0改为1，内核兼容模式
（2）关闭selinux，重启后生效
[[email protected] ~]#vim /etc/sysconfig/selinux
......
SELINUX=disabled
[[email protected] ~]#setenforce 0
setenforce: SELinux is disabled
[[email protected] ~]#getenforce
Disabled
（3）关闭防火墙
[[email protected] ~]#chkconfig ip6tables off
[[email protected] ~]#chkconfig iptables off
（4）重启
[[email protected] ~]#reboot
2.虚拟化环境配置
（1）查看是否支持虚拟机
说明1:半虚拟化是不能运行与安装KVM虚拟机的。
[[email protected] ~]#egrep ‘(vmx|svm)‘ --color=always /proc/cpuinfo #出现vmx的信息就说明执行kvm虚拟化
（2）配置yum环境，确认yum源是好使的。（这一步骤省略，可以用默认yum源，也可以换用163或阿里的yum源，只要能正常使用就行）
（3）安装kvm软件包
[[email protected] ~]#yum -y install kvm python-virtinst libvirt tunctl bridge-utils virt-manager qemu-kvm-tools virt-viewer virt-v2v
补充安装kvm虚拟化一些管理工具包
[[email protected] ~]#yum -y install libguestfs-tools
3.查看虚拟化环境
（1）查看虚拟机环境
[[email protected] ~]# /etc/init.d/libvirtd restart
Stopping libvirtd daemon: [ OK ]
Starting libvirtd daemon: [ OK ]
[[email protected] ~]# virsh -c qemu:///system list
Id Name State
----------------------------------------------------
（2）查看kvm模块支持
[[email protected] ~]# lsmod |grep kvm
kvm_intel 54285 0
kvm 333172 1 kvm_intel
（3）查看虚拟工具版本
[[email protected] ~]# virsh --version
0.10.2
[[email protected] ~]# virt-install --version
0.600.0
[[email protected] ~]# ln -s /usr/libexec/qemu-kvm /usr/bin/qemu-kvm
4.手动配置虚拟网桥
（1）关闭networkmanager服务
[[email protected] ~]# chkconfig NetWorkManager off
[[email protected] ~]# /etc/init.d/NetWorkManager stop
（2）创建br0网桥
[[email protected] ~]#cd /etc/sysconfig/network-scripts/
[[email protected] ~]#cp ifcfg-em2 ifcfg-br0 #em2是本机内网网卡
[[email protected] ~]# cat ifcfg-em2
DEVICE=em2
HWADDR=44:A8:42:21:A6:01
TYPE=Ethernet
BRIDGE="br0"
UUID=6dbfbd49-b6b9-4c51-b2d2-b3ecbead82e9
ONBOOT=yes
IPADDR=192.168.1.17
NM_CONTROLLED=yes
BOOTPROTO=static
[[email protected] ~]# cat ifcfg-br0
DEVICE=br0
HWADDR=44:A8:42:21:A6:01
TYPE=Bridge
UUID=6dbfbd49-b6b9-4c51-b2d2-b3ecbead82e9
ONBOOT=yes
IPADDR=192.168.1.17
NM_CONTROLLED=yes
BOOTPROTO=static
（3）关闭了networkmanager服务之后，才能通过重启网卡服务管理网络。
[[email protected] ~]# /etc/init.d/network restart
（4）查看网桥br0信息
[[email protected] ~]# ifconfig
br0 Link encap:Ethernet HWaddr 44:A8:42:21:A6:01
inet addr:192.168.1.17 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::46a8:42ff:fe21:a601/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:6642 errors:0 dropped:0 overruns:0 frame:0
TX packets:12 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:2146342 (2.0 MiB) TX bytes:720 (720.0 b)
em1 Link encap:Ethernet HWaddr 44:A8:42:21:A6:00
inet addr:116.15.186.17 Bcast:103.10.86.63 Mask:255.255.255.192
inet6 addr: fe80::46a8:42ff:fe21:a600/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:5877878 errors:0 dropped:0 overruns:0 frame:0
TX packets:175381 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:921486122 (878.7 MiB) TX bytes:22894696 (21.8 MiB)
Interrupt:35
em2 Link encap:Ethernet HWaddr 44:A8:42:21:A6:01
inet6 addr: fe80::46a8:42ff:fe21:a601/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2412349 errors:0 dropped:0 overruns:0 frame:0
TX packets:11 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:314457702 (299.8 MiB) TX bytes:872 (872.0 b)
Interrupt:38
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:238 errors:0 dropped:0 overruns:0 frame:0
TX packets:238 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:58469 (57.0 KiB) TX bytes:58469 (57.0 KiB)
virbr0 Link encap:Ethernet HWaddr 52:54:00:5F:95:B7
inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
（5）查看网桥
[[email protected] ~]# brctl show
bridge name bridge id STP enabled interfaces
br0 8000.44a84221a601 no em2
virbr0 8000.5254005f95b7 yes virbr0-nic
到此kvm虚拟化环境安装完毕。