1. Download the 6.5 image and configure the network yum source on the host

yum install httpd -y
systemctl start httpd
systemctl enable httpd
mkdir /var/www/html/rhel6.5/
mount /iso/rhel-server-6.5-x86_64-dvd.iso  /var/www/html/rhel6.5/

2. Create a master disk:
(1) open Virtual Machine Manager and select to install virtual machine through network

(2) installation settings:

(3) configure the motherboard environment

##Configure host name
vi /etc/sysconfig/network
HOSTNAME=yyserver1

##Configure local resolution
vi /etc/hosts
172.25.24.1		yyserver1
172.25.24.2		yyserver2
172.25.24.3		yyserver3
172.25.24.4		yyserver4

#Remove 70 persistent net.rules
cd /etc/udev/rules.d/
ls
rm -rf 70-persistent-net.rules

#Configure ip address
vi /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE="eth0"
BOOTROTO="static"
IPADDR="172.25.24.1'
NETMASK="255.255.255.0"
ONBOOT="yes"

/etc/init.d/network restart  ##service network restart 

##Configure yum source
vi /etc/yum.repos.d/rhel-source.repo
yum repolist

#Modify selinux working state
vi /etc/sysconfig/selinux
SELINUX=disabled

##Turn off the firewall and turn it on automatically
/etc/init.d/iptables stop
/etc/init.d/ip6tables stop
chkconfig iptables off
chkconfig ip6tables off

##Download lftp, ssh and vim services
yum install lftp openssh-clients vim -y

##After the configuration of the master disk environment is completed, poweroff is required instead of reboot ing
poweroff
##In order to prevent inadvertently opening the master disk, delete the master disk from the Virtual Manchine Manager interface. Be careful not to delete the master disk file

(4) create a snapshot by using the configured environment's master disk

cd /var/lib/libvirt/images/
qemu-img create -f qcow2 -b yyserver1.qcow2 yy1
qemu-img create -f qcow2 -b yyserver1.qcow2 yy2
qemu-img create -f qcow2 -b yyserver1.qcow2 yy3

(5) create virtual machine 1, 2 and 3 through the generated snapshot and configure the environment respectively
Change the ip addresses of the three virtual machines to 172.25.24.1172.25.24.2172.25.24.3
Change the host name to server1, server2, server3
And check whether the network between the three virtual machines can be connected to each other
Note: if the network service of the virtual machine cannot be started, 70-persistent-net.rules may not be deleted. Delete 70-persistent-net.rules and replace the network card used by the virtual machine with eht1 and restart the network service

(6) the three virtual machines can communicate with each other, and the preparation environment is completed