备份一个通过拷贝来创建虚拟机镜像的脚本

备份一个通过拷贝来创建虚拟机镜像的脚本

 

[plain]

#!/bin/sh  

  

machine=$1  

mac=$2  

ip=$3  

  

if [ -z "$machine" ]; then  

    echo "usage: sh $0 machine mac ip"  

    exit  

fi  

  

source_bytes=`fdisk -ucl /dev/vbd/test00|grep test00|grep -Eo "[0-9]+ bytes"|cut -d" " -f1`  

source_M=$(($source_bytes/1024/1024))  

  

echo "creating new logic volumn $machine"  

lvcreate -L ${source_M}M -n $machine vbd  

  

echo "copy data from lv test00"  

dd if=/dev/vbd/test00 of=/dev/vbd/$machine bs=1M count=$source_M  

  

echo "mount new created logic volumn"  

kpartx -av /dev/vbd/$machine  

  

echo "scan volumn group"  

vgscan  

  

echo "rename volumn group to $machine"  

vgrename test00 $machine  

  

echo "load volumn group $machine"  

vgchange -ay $machine  

  

echo "mount logic volumn lv_root"  

mount /dev/$machine/lv_root /mnt  

  

echo "modify fstab to new volumn group name $machine"  

sed -i "s/test00/$machine/g" /mnt/etc/fstab   

sed -i "s/test00/$machine/g" /mnt/etc/sysconfig/network  

  

if [ -n "$mac" ]; then  

    sed -i "s/00:16:3E:38:01:E6/$mac/g" /mnt/etc/sysconfig/network-scripts/ifcfg-eth0  

fi  

  

if [ -n "$ip" ]; then  

    sed -i "s/192.168.1.230/$ip/g" /mnt/etc/sysconfig/network-scripts/ifcfg-eth0  

fi  

  

echo "umount lv_root"  

umount /mnt  

  

echo "mount first partition of vbd-$machine"  

mount /dev/mapper/vbd-${machine}p1 /mnt  

  

echo "change menu.lst to $machine"  

sed -i "s/test00/$machine/g" /mnt/grub/menu.lst  

  

echo "umount vbd-$machine"  

umount /mnt  

  

echo "disable vg"  

vgchange -an $machine  

  

echo "disable $machine"  

kpartx -d /dev/vbd/$machine