bash练习6 （虚拟机改名）

虚拟机改名脚本：renamevm.sh

#!/usr/bin/bash
# change the name of the designate vm to a new name
# Usage: vmrename oldname newname
# 本程序实现的功能是将虚拟机更改名称，其镜像文件名称也被更改，其路径在原路径。


if [ $UID -ne 0 ]
then
        echo "You are not root, can not execute this script"
        exit 1
fi

if [ $# -ne 2 ]
then
        echo "Usage Error! Usage: renamevm.sh oldvm newvm"
        exit 1
fi

OLDVM=$1
NEWVM=$2

FLAG=0
ALLVM=$(virsh list --all | sed -n '3,$p' | awk '{print $2}')
for vm in ${ALLVM}
do
        if [[ "${OLDVM}" == "$vm" ]]
        then
                FLAG=1
                break
        fi
done

if [ ${FLAG} -eq 0 ]
then
        echo "source vm ${OLDVM} does not exist!"
        exit 1
fi

FLAG=1
for vm in ${ALLVM}
do
        if [[ "${NEWVM}" == "$vm" ]]
        then
                FLAG=0
                break
        fi
done

if [ ${FLAG} -eq 0 ]
then
        echo "dest vm ${NEWVM} already exits"
        exit 1
fi

STAT=$(virsh list --all | grep ${OLDVM} | awk '{print $3}')
if [[ ${STAT} == "running" ]]
then
        echo "${OLDVM} is running now, please shutdown it first"
        exit 1
fi

virsh dumpxml ${OLDVM} > ${NEWVM}.xml
if [ ! -e ${NEWVM}.xml ]
then
        echo "can not find ${NEWVM}.xml "
        exit 1
fi


sed -ri "s@(<name>).*(</name>)@\1${NEWVM}\2@" ${NEWVM}.xml
FILEPATH=$(cat ${NEWVM}.xml | sed -rn '/<source file/p' | sed -rn "s@.*<source file='(.*)'/>@\1@p")
EXT=$(cat ${NEWVM}.xml | sed -rn '/<driver name/p' | sed -rn "s@.*<driver name.*'(.*)'/>@\1@p")
DISKDIR=$(dirname ${FILEPATH})
NEWFILEPATH=${DISKDIR}/${NEWVM}.${EXT}

mv ${FILEPATH} ${NEWFILEPATH}
sed -ri "s@(.*<source file=').*('/>)@\1${NEWFILEPATH}\2@" ${NEWVM}.xml
#
#echo "OLDVM:$OLDVM"
#echo "OLDDISK:${FILEPATH}"
#echo "NEWDISK:${NEWFILEPATH}"

virsh undefine ${OLDVM} &>/dev/null
virsh define ${NEWVM}.xml &>/dev/null

if [ $? -eq 0 ]
then
        echo "rename old vm ${OLDVM} to ${NEWVM} Successfully"
else
        echo "rename old vm ${OLDVM} to ${NEWVM} failed"
fi

rm -rf ${NEWVM}.xml

测试：