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
