使用shell一键克隆虚拟机
说明：此脚本是通过快照技术快速的一键克隆虚拟机，脚本只限于CentOS和Redhat。输入数字后会创建一个以标号标识的虚拟机。
代码如下：
#!/bin/bash
# exit code:
# 65 -> user input nothing
# 66 -> user input is not a number
# 67 -> user input out of range
# 68 -> vm disk image exists
IMG_DIR=/var/lib/libvirt/images
BASEVM=rh7_template
###BASEVM为后端的img文件名，此文件名根据自己需求更改！！！
ROOM=sed-n "1p" /etc/hostname |sed -r 's/(room)({1,})(.*)/\2/'
if [ $ROOM -le 9 ];then
ROOM=0$ROOM
fi
IP=sed-n "1p" /etc/hostname | sed -r 's/(.*)(+)(.*)/\2/'
read -p "Enter VM number: " VMNUM
if [ $VMNUM -le 9 ];then
VMNUM=0$VMNUM
fi
if [ -z "${VMNUM}" ]; then
echo "You must input a number."
exit 65
elif [ $(echo ${VMNUM}*1 | bc) = 0 ]; then
echo "You must input a number."
exit 66
elif [ ${VMNUM} -lt 1 -o ${VMNUM} -gt 99 ]; then
echo "Input out of range"
exit 67
fi
NEWVM=rh7_node${VMNUM}
if [ -e $IMG_DIR/${NEWVM}.img ]; then
echo "File exists."
exit 68
fi
echo -en "Creating Virtual Machine disk image......\t"
qemu-img create -f qcow2 -b $IMG_DIR/.${BASEVM}.img $IMG_DIR/${NEWVM}.img &> /dev/null
echo -e "\e\e[0m"
#virsh dumpxml ${BASEVM} > /tmp/myvm.xml
cat /var/lib/libvirt/images/.rhel7.xml > /tmp/myvm.xml
###rhel7.xml此文件需要存在！！！
sed -i "/${BASEVM}/s/${BASEVM}/${NEWVM}/" /tmp/myvm.xml
sed -i "/uuid/s/.*/$(uuidgen)/" /tmp/myvm.xml
sed -i "/${BASEVM}.img/s/${BASEVM}/${NEWVM}/" /tmp/myvm.xml
sed -i "/mac /s/a1/${ROOM}/" /tmp/myvm.xml
sed -i "/mac /s/a2/${IP}/" /tmp/myvm.xml
sed -i "/mac /s/a3/${VMNUM}/" /tmp/myvm.xml
sed -i "/mac /s/b1/${ROOM}/" /tmp/myvm.xml
sed -i "/mac /s/b2/${IP}/" /tmp/myvm.xml
sed -i "/mac /s/b3/${VMNUM}/" /tmp/myvm.xml
sed -i "/mac /s/c1/${ROOM}/" /tmp/myvm.xml
sed -i "/mac /s/c2/${IP}/" /tmp/myvm.xml
sed -i "/mac /s/c3/${VMNUM}/" /tmp/myvm.xml
sed -i "/mac /s/d1/${ROOM}/" /tmp/myvm.xml
sed -i "/mac /s/d2/${IP}/" /tmp/myvm.xml
sed -i "/mac /s/d3/${VMNUM}/" /tmp/myvm.xml
echo -en "Defining new virtual machine......\t\t"
virsh define /tmp/myvm.xml &> /dev/null
echo -e "\e\e[0m"
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