一、搭建dhcp服务器

yum install dhcp -y ##安装dhcp软件

rpm -qc dhcp ##查看dhcp安装路径

cp /usr/share/doc/dhcp*/dhcpd.conf.example /etc/dhcp/dhcpd.conf ##复制模版到dhcpd.conf

im /etc/dhcp/dhcpd.conf ##更改其中部分配置，以下文为准,有注释的行可自行更改
1 # dhcpd.conf
2 #
3 # Sample configuration file for ISC dhcpd
4 #
5
6 # option definitions common to all supported networks…
7 option domain-name “dhcpserver.com”; ##设置域名
8 option domain-name-servers 114.114.114.114; ##dns解析地址
9
10 default-lease-time 600;
11 max-lease-time 7200;
12
13 # Use this to enble / disable dynamic dns updates globally.
14#ddns-update-style none;
15
16 # If this DHCP server is the official DHCP server for the local 17 # network, the authoritative directive should be uncommented. 18 #authoritative;
19
20 # Use this to send dhcp log messages to a different log file (you also
21 # have to hack syslog.conf to complete the redirection).
22 log-facility local7;
23
24 # No service will be given on this subnet, but declaring it helps the
25 # DHCP server to understand the network topology.
26
27
28 # This is a very basic subnet declaration.
29
30 subnet 172.25.254.0 netmask 255.255.255.0 {
31 range 172.25.254.60 172.25.254.99; ##分配的ip段
32 option routers 172.25.254.10; ##分配的网关
33 }

systemctl start dhcpd ##打开dhcpd服务

二、自动安装虚拟机

1.建立自动安装系统脚本
注：该脚本可在虚拟机上建立也可在真机上建立，以下是在虚拟机中建立过程。
yum install system-config-kickstart -y ##安装生成自动安装系统脚本的软件
system-config-kickstart ##打开该软件的图形界面，开始设置

完成以上步骤后会生成ks.cfg文件，打开该文件，在文章的最后添加以下内容
%packages
@base
lftp
%end

ksvalidator ks.cfg ##检验ks.cfg是否有语法错误

yum install httpd -y ##安装
httpd systemctl stop firewalld ##关闭防火墙
systemctl disable firewalld ##设置开机自动关闭防火墙
systemctl start httpd ##开启
httpd systemctl enable httpd ##设置开机自动开启
httpd cp ks.cfg /var/www/html/ ##发布ks.cfg到网络上

以下步骤必须在真机中操作
vim vm_install ##创建安装虚拟机脚本
#!/bin/bash
virt-install \ ##新建虚拟机命令
–name $1 \ ##设置名字，并在调用时命名
–memory 1000 \ ##设置内存
–vcpus 1 \ ##设置cpu内核数
–disk /var/lib/libvirt/images/$1.qcow2,size=8,bus=virtio \ ##设置硬盘
–network bridge=br0,model=virtio \ ##设置网卡
–location http://172.25.254.10/yum-b \ ##选择镜像路径 --extra-args “ks=http://172.25.254.109/ks.cfg” &> /dev/null & ##选择自动安装系统脚本

sh vm_install lan ##调用自动安装虚拟机脚本