对interface文件操作
old：
auto lo
iface lo inet loopback
auto eth1
iface eth1 inet static
address 10.0.13.13
netmask 255.255.255.0
auto br0
iface br0 inet static
address 1.1.1.1
netmask 255.255.255.0
gateway 1.1.1.1
bridge_ports eth0
bridge_stp off
bridge_fd 0
bridge_maxwait 0
dns-nameservers 202.106.0.20 202.106.196.115
post-up for i in `virsh list | grep running| awk ‘{print $2}‘|tr "\n" " " `;do brctl show | grep $i >/dev/null; [ "$?" != "0" ] && brctl addif br0 $i;done
new：
auto lo
iface lo inet loopback
auto br1
iface br1 inet static
address 10.0.13.13
netmask 255.255.255.0
bridge_ports eth1
bridge_stp off
bridge_fd 0
bridge_maxwait 0
dns-nameservers 202.106.0.20 202.106.196.115
auto br0
iface br0 inet static
address 1.1.1.1
netmask 255.255.255.0
gateway 1.1.1.1
bridge_ports eth0
bridge_stp off
bridge_fd 0
bridge_maxwait 0
dns-nameservers 202.106.0.20 202.106.196.115
# post-up for i in `virsh list | grep running| awk ‘{print $2}‘|tr "\n" " " `;do brctl show | grep $i >/dev/null; [ "$?" != "0" ] && brctl addif br0 $i;done
post-up for i in `virsh list | grep running| awk ‘{print $2}‘|tr "\n" " " `;do brctl show | grep $i >/dev/null; [ "$?" != "0" ] && brctl addif br0 $i;brctl addif br1 ${i}-2;done
less a.sh
#!/bin/bash
cp /etc/network/interfaces /etc/network/interfacesbak
netmasknum=`grep -i -n "netmask" /etc/network/interfaces | awk -F : ‘{print $1}‘|grep -v $(($(grep -i -n "gateway" /etc/network/interfaces|awk -F : ‘{print $1}‘)-1))`
wangkaming=`head -n $(($netmasknum-3)) /etc/network/interfaces|tail -n 1| awk ‘{print $2}‘`
wangkaip=`head -n $(($netmasknum-1)) /etc/network/interfaces | tail -n 1 | awk ‘{print $2}‘`
totalnum=`grep -n -i "post-up" /etc/network/interfaces | awk -F : ‘{print $1}‘`
sed -i `expr $netmasknum + 1`a"auto br1" /etc/network/interfaces
sed -i `expr $netmasknum + 2`a"\\\tiface br1 inet static" /etc/network/interfaces
sed -i `expr $netmasknum + 3`a"\\\taddress ${wangkaip}" /etc/network/interfaces
sed -i `expr $netmasknum + 4`a"\\\tnetmask 255.255.255.0" /etc/network/interfaces
sed -i `expr $netmasknum + 5`a"\\\tbridge_ports ${wangkaming}" /etc/network/interfaces
sed -i `expr $netmasknum + 6`a"\\\tbridge_stp off" /etc/network/interfaces
sed -i `expr $netmasknum + 7`a"\\\tbridge_fd 0" /etc/network/interfaces
sed -i `expr $netmasknum + 8`a"\\\tbridge_maxwait 0" /etc/network/interfaces
sed -i `expr $netmasknum + 9`a"\\\tdns-nameservers 202.106.0.20 202.106.196.115" /etc/network/interfaces
sed -i `expr $netmasknum + 10`a"\\\t" /etc/network/interfaces
sed -i ‘s/\(.*post-up.*\)/#\1/‘ /etc/network/interfaces
sed -i "$(($netmasknum-3)),${netmasknum}d" /etc/network/interfaces
sed -i "s#.*dns-nameservers.*#\\tdns-nameservers 202.106.0.20 202.106.196.115#g" /etc/network/interfaces
cat >> /etc/network/interfaces << "EOF"
post-up for i in `virsh list | grep running| awk ‘{print $2}‘|tr "\n" " " `;do brctl show | grep $i >/dev/null; [ "$?" != "0" ] && brctl addif br0 $i;brctl addif br1 ${i}-2;done
EOF
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