一 准备模板主机和XML文件 /var/lib/libvirt/images/下
.ce7_template.img .centos7.xml
二 编写克隆脚本clone-centos7 /var/lib/libvirt/images/bin/下
#!/bin/bash
#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 //定义变量IMG_DIR--虚拟机目录
BASEVM=ce7_template //定义变量BASEVM--虚拟主机模板
read -p "Enter VM number: " VMNUM
if [ $VMNUM -le 9 ];then
VMNUM=0$VMNUM //编号小于9,前面加0,保持两位
fi
if [ -z "${VMNUM}" ]; then
echo "You must input a number." //输入为空值时的输出结果
exit 65
elif [ $(echo ${VMNUM}*1 | bc) = 0 ]; then
echo "You must input a number." //输入为0时的输出结果
exit 66
elif [ ${VMNUM} -lt 1 -o ${VMNUM} -gt 99 ]; then
echo "Input out of range" //输入超过99时的输出结果
exit 67
fi
NEWVM=ce7_node${VMNUM} //定义变量—-新虚拟机名
if [ -e $IMG_DIR/${NEWVM}.img ]; then //镜像文件已存在
echo "File exists."
exit 68
fi
echo -en "Creating Virtual Machine disk image...... "
cd /var/lib/libvirt/images
qemu-img create -f qcow2 -b $IMG_DIR/.${BASEVM}.img $IMG_DIR/${NEWVM}.img &> /dev/null //镜像克隆
echo -e "e[32;1m[OK]e[0m"
cat /var/lib/libvirt/images/.centos7.xml > /tmp/myvm.xml
sed -i "/${BASEVM}/s/${BASEVM}/${NEWVM}/" /tmp/myvm.xml
/tmp/myvm.xml //修改XML文件
sed -i "/${BASEVM}.img/s/${BASEVM}/${NEWVM}/" /tmp/myvm.xml
echo -en "Defining new virtual machine...... "
virsh define /tmp/myvm.xml &> /dev/null //重新定义生成新虚拟机
echo -e "e[32;1m[OK]e[0m"
三 创建链接文件
ln -s /var/lib/libvirt/images/bin/clone-centos7 /usr/local/bin