kvm安装
yum groupinstall -y "virtualization" "virtualization client"
yum install -y libvirt bridge-utils tunctl
桥接网卡
vim ifcfg-eth0
DEVICE=eth0
ONBOOT=yes
TYPE=Ethernet
BOOTPROTO=static
HWADDR=e8:40:f2:0c:b1:d6
IPV6INIT=no
BRIDGE=br0
vim ifcfg-br0
DEVICE=br0
ONBOOT=yes
TYPE=Bridge
BOOTPROTO=static
IPADDR=172.16.122.119
NETMASK=255.255.254.0
GATEWAY=172.16.122.1
DNS1=8.8.8.8
IPV6INIT=no
BRIDGE=br0
建立虚拟硬盘
dd if=/dev/zero of=centos01.img bs=1G count=30