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-manager qemu
      

      (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/

ubuntu下的KVM