1. BIOS开启VT

2. 安装ubuntu系统

   1. 安装kvm相关的软件，并设置桥接网卡

      (1) # apt-get install qemu-kvm libvirt-bin virtinst bridge-utils cpu-checker

      #$ sudo apt-get install virt-managerqemu
      

      (2) #kvm-ok
      INFO: /dev/kvm exists
      KVM acceleration can be used

      (3) #cp /etc/network/interfaces /etc/network/interfaces.bakup

      (4) #vi /etc/network/interfaces

      auto br0
      iface br0 inet static
      address 10.18.44.26
      netmask 255.255.255.192
      broadcast 10.18.44.63
      dns-nameservers 10.0.80.11 10.0.80.1
      bridge_ports eth0
      bridge_stp off
      bridge_fd 0
      bridge_maxwait 0

      auto eth0

      iface eth0 inet static

      (5) 如果有都个网卡，可以做多个桥接口

auto br1
iface br1 inet static
address 208.43.222.51
netmask 255.255.255.248
broadcast 208.43.222.55
gateway 208.43.222.49
bridge_ports eth1
bridge_stp off
bridge_fd 0
bridge_maxwait 0

auto eth1

iface eth1 inet static

直接使用brctl命令配置

$ sudo brctl addbr br0
$ sudo ip addr show
$ sudo brctl addif br0 eth0

创建虚拟机：

$ sudo virt-install \
--virt-type=kvm \
--name centos7 \
--ram 2048 \
--vcpus=2 \
--os-variant=rhel7 \
--virt-type=kvm \
--hvm \
--cdrom=/var/lib/libvirt/boot/CentOS-7-x86_64-DVD-1511.iso \
--network=bridge=br0,model=virtio \
--network=bridge=br1,model=virtio \
--graphics vnc \
--disk path=/var/lib/libvirt/images/centos7.qcow2,size=40,bus=virtio,format=qcow2

$ sudo virsh dumpxml centos7 | grep vnc
<graphics type='vnc' port='5901' autoport='yes' listen='127.0.0.1'>

$ sudo virsh vncdisplay centos7

参照：该链接https://www.cyberciti.biz/faq/installing-kvm-on-ubuntu-16-04-lts-server/