在Ubuntu下编译安装kvm

1、下载包
我的内核是2.6.32,需要下载对应的软件包
http://sourceforge.net/projects/kvm/files/qemu-kvm/0.12.5/qemu-kvm-0.12.5.tar.gz/download
内核默认有的kvm,CPU占用过大,我们自己编译最新版的

其他的库 zlib sdl alsa gnutls等等

sudo apt-get install gcc libsdl1.2-dev zlib1g-dev libasound2-dev linux-kernel-headers pkg-config libgnutls-dev libpci-dev pciutils-dev

2、编译qemu-kvm

tar xzf qemu-kvm-0.12.5.tar.gz
cd qemu-kvm-0.12.5
./configure --prefix=/usr/local/kvm
make
sudo make install
sudo /sbin/modprobe kvm-intel

3、创建镜像

/usr/local/kvm/bin/qemu-img create -f qcow2 centos.img 10G

4、启动虚拟机(安装操作系统)

#安装虚拟机
sudo /usr/local/kvm/bin/qemu-system-x86_64 -m 256 -boot d -drive file=/home/liheyuan/虚拟机/kvm/centos.img,cache=writeback -localtime -cdrom /media/4C088BD8088BBF86/虚拟镜像/OS/CentOS-5.4-i386-bin-DVD.iso 

#平时启动
sudo /usr/local/kvm/bin/qemu-system-x86_64 -m 256 -drive file=/home/liheyuan/虚拟机/kvm/centos.img,cache=writeback -localtime 

5、网络桥接
请参考《KVM虚拟化的多个网卡桥接配置》

#安装/usr/sbin/brctl和/usr/sbin/tunctl
sudo apt-get install bridge-utils uml-utilities

#这里我们只设置public bridge,即可以和真实网络通信的,否则没有意义
vim /etc/network/interfaces
#酌情添加如下内容
auto eth0
iface eth0 inet dhcp

auto tap0
iface tap0 inet manual
up ifconfig $IFACE 0.0.0.0 up
down ifconfig $IFACE down
tunctl_user liheyuan 

auto br0
iface br0 inet dhcp
bridge_ports eth0 tap0

#重启网络
/etc/init.d/networking restart
#正常情况下br0将分配到原来eth0应该得到的IP,eth0没有得到IP

#之后的启动
sudo /usr/local/kvm/bin/qemu-system-x86_64 -m 256 -drive file=/home/liheyuan/虚拟机/kvm/centos.img,cache=writeback -localtime -net nic,macaddr=00-11-22-33-44-55 -net tap,ifname=tap0,script=no

6、创建网络console
#启动虚拟机
sudo /usr/local/kvm/bin/qemu-system-x86_64 -m 256 -drive file=/home/liheyuan/虚拟机/kvm/centos.img,cache=writeback -localtime -net nic,macaddr=00-11-22-33-44-55 -net tap,ifname=tap0,script=no

#设置menu.lst
vim /boot/grub/menu.lst
#头部添加如下两行
serial --unit=0 --speed=9600 --word=8 --parity =no --stop=1
terminal --timeout=1 --dumb serial console
#并在kernel的一行加入
console=tty0 console=ttyS0,9600n8

#设置
vim /etc/inittab
#添加或者修改这一行:
T0:123:respawn:/sbin/getty -L ttyS0 9600 vt100

#保存,退出,一般就OK了。再次重启时候
sudo /usr/local/kvm/bin/qemu-system-x86_64 -m 256 -drive file=/home/liheyuan/虚拟机/kvm/centos.img,cache=writeback -localtime -nographic

7、进一步提升性能
virtio (提升I/O性能)
参考:
http://www.heboliang.cn/archive/kvm-windows.html
http://www.linux-kvm.org/page/Virtio

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