1.kvm架构

两大部分组成：kvm模块和qemu-kvm
kvm.ko、kvm_intel.ko、kvm_amd.ko
qemu-kvm:修改qemu代码实现的管理和创建虚拟机的管理工具
/dev/kvm：linux系统下kvm提供的驱动接口

kvm：vCPU、vMEM
qemu-kvm：io device

2.搭建kvm

确认硬件服务器支持
cat /proc/cpuinfo | grep vmx
yum源配置
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo
安装
yum clean all & yum makecache
yum install -y qemu-kvm qemu-img virt-manager virt-install virt-viewer libguest* libvirt*
yum groupinstall -y virtualization-client virtualization-platform virtualization-tools

3.创建vm命令

virt-install --name vm1 --ram=2048 --vcpus=2 --disk path=/vm-images/vm1.qcow2,size=20 --cdrom /opt/CentOS-7-X86_64-DVD-1511.iso

4.安装linux界面和vnc

yum -y groupinstall "X Window System"
yum -y groupinstall "GNOME"
yum install -y tigervnc-server.x86_64
vncserver :1

5.创建br0

cd /etc/sysconfig/network-scripts
vi ifcfg-br0
DEVICE="br0"
ONBOOT=yes
TYPE="Bridge"
BOOTPROTO=none
IPADDR=192.168.18.239
NETMASK=255.255.255.0
GATEWAY=192.168.18.1

将物理网卡桥接到br0
vi ifcfg-eth0
BRIDGE=br0
注释掉 IPADDR NETMASK GATEWAY DNS1

service network restart
brctl show