KVM虚拟机管理脚本

Posted 2023-04-29

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参考技术A 运行本脚本需要提前准备好vm01虚拟机

虚拟机的两个重要目录：

1：磁盘目录：/var/lib/libvirt/images/

2：配置文件目录：/etc/libvirt/qemu/

3：kvm虚拟机采用nat方式上网，需要开启宿主机的路由转发

在文件/etc/sysctl.conf中添加：

net.ipv4.ip_forward=1

#!/bin/bash

#This script can manage the virtual machines.

#Athor:Yilan

#Date:2020-08-29

#Version:V2.0

#新建kVM虚拟机

function create_kvm

clear

XMLPATH=/etc/libvirt/qemu

IMGPATH=/var/lib/libvirt/images

read -p "Please input the name of the new virtual machine:" newname

if [ -z $newname ];then

echo "Nothing input."

exit 1

fi

mykvm=$IMGPATH/$newname.qcow2

if [ -f "$mykvm" ];then

echo "KVM already exists."

exit 2

else

echo -e "\033[34m Your KVM is creating, please wait...... \033[0m"

#Copy the file from the temlate.

cp $XMLPATH/vm1.xml $XMLPATH/$newname.xml

cp $IMGPATH/vm1.qcow2 $IMGPATH/$newname.qcow2

newxml=$XMLPATH/$newname.xml

#Create the new uuid, mac address.

newuuid=$(cat /proc/sys/kernel/random/uuid)

newmac=$(openssl rand 3 | xxd -p | sed 's/../&\:/g; s/:$//')

#Modify the xml file of the new virtual machine, such as name, uuid and mac address.

sed -i "s/vm1/$newname/g" $newxml

sed -i "s/<uuid>.*<\/uuid>/<uuid>$newuuid<\/uuid>/" $newxml

sed -i "s/<mac address=.*\/>/<mac address='52:54:00:$newmac'\/>/" $newxml

#Define the new KVM.

virsh define $newxml &> /dev/null

virsh start $newname &> /dev/null

sleep 30

mac=`virsh dumpxml $newname |grep -w mac |awk -F "'" 'print $2'`

echo -e "\033[31m $newname is done, enjoy it!\033[0m"

echo "虚拟机$newname,的ip地址是:`arp -a |grep -i $mac | awk -F"[()]" 'print $2'` "

fi

#列出所有KVM虚拟机

function list_kvm

clear

echo "All virtual machines are listing here."

virsh list --all

#停止虚拟机

function stop_kvm

clear

virsh list --all

read -p "Please choose the kvm you want to stop:" kvmstop

virsh shutdown $kvmstop

echo "The kvm you choose is down."

#开启虚拟机

function start_kvm

clear

virsh list --all

read -p "Please choose the name of the kvm you want to start:" kvmstart

virsh start $kvmstart

echo "The kvm you choose is up."

#删除虚拟机

function delete_kvm

clear

virsh list --all

read -p "Please choose the name of the kvm you want to delete:" kvmdelete

virsh undefine $kvmdelete

rm -rf /var/lib/libvirt/images/$kvmdelete.qcow2

rm -rf /etc/libvirt/qemu/$kvmdelete.xml

echo "The kvm you choose is delete."

function menu

clear

echo

echo -e "########## Admin Menu ##########"

echo

echo -e "\t1. Create your KVM."

echo -e "\t2. List all KVM."

echo -e "\t3. Stop the kvm."

echo -e "\t4. Start the KVM."

echo -e "\t5. Delete the KVM."

echo -e "\t0. Exit menu\n"

echo -e "################################"

read -p "Please input your choice:" option

while [ 1 ]

do

menu

case $option in

0)

break;;

1)

create_kvm ;;

2)

list_kvm;;

3)

stop_kvm;;

4)

start_kvm;;

5)

delete_kvm;;

*)

clear

echo "Sorry, wrong selection";;

esac

echo -en "\nHit any key to continue"

read -n 1 line

done

clear