1 安装必要服务包

yum install dhcp tftp-server httpd syslinux

systemctl enable dhcpd httpd tftp.socket

systemctl start httpd

2 准备YUM源

mkdir /var/www/html/centos/{6,7}/ -pv

vim /etc/fstab 加下面行

/dev/sr0 /var/www/html/centos/6 iso9660 defaults 0 0

/dev/sr1 /var/www/html/centos/7 iso9660 defaults 0 0

mount -a

3 准备ks文件

mkdir /var/www/html/ksdir/{6,7} -pv

cp /root/ks6_mini.cfg /var/www/html/ksdir/7/ks6_mini.cfg

cp /root/ks7_desktop.cfg /var/www/html/ksdir/7/ks7_desktop.cfg

chmod +r /var/www/html/ksdir/7/ks7_desktop.cfg

root@centos7 tftpboot#tree /var/www/html/ksdir/

/var/www/html/ksdir/

├── 6

│ └── ks6_mini.cfg

└── 7

└── ks7_desktop.cfg

最好确认下应答文件是否可以httpd正常访问

4 配置dhcp服务

cp /usr/share/doc/dhcp-4.2.5/dhcpd.conf.example /etc/dhcp/dhcpd.conf

vim /etc/dhcp/dhcpd.conf

root@centos7 tftpboot#cat /etc/dhcp/dhcpd.conf

option domain-name “magedu.org”;

option domain-name-servers 114.114.114.114,1.1.1.1;

option routers 192.168.30.200;

default-lease-time 86400;

max-lease-time 100000;

subnet 192.168.30.0 netmask 255.255.255.0 {

​ range 192.168.30.10 192.168.30.100;

​ option routers 192.168.30.254;

​ option domain-name-servers 8.8.8.8;

​ next-server 192.168.30.17;

​ filename “pxelinux.0”;

}

systemctl start dhcpd

5 准备PXE相关文件

rpm -ql syslinux

mkdir /var/lib/tftpboot/pxelinux.cfg/

cp /usr/share/syslinux/pxelinux.0 /var/lib/tftpboot/

cp /usr/share/syslinux/menu.c32 /var/lib/tftpboot/

mkdir /var/lib/tftpboot/centos{6,7}

cp /var/www/html/centos/7/isolinux/{vmlinuz,initrd.img} /var/lib/tftpboot/centos7/

cp /var/www/html/centos/6/isolinux/{vmlinuz,initrd.img} /var/lib/tftpboot/centos6/

cp /var/www/html/centos/7/isolinux/isolinux.cfg /var/lib/tftpboot/pxelinux.cfg/default

最终目录结构如下：

6.修改启动菜单

vim /var/lib/tftpboot/pxelinux.cfg/default

default menu.c32

timeout 600

menu title AUTO Install CentOS6 or 7

label centos7

menu label ^Install Desktop CentOS 7

kernel centos7/vmlinuz

append initrd=centos7/initrd.img ks=http://192.168.30.17/ksdir/ks7_desktop.cfg

label centos6

menu label install ^Mini CentOS 6

menu default

kernel centos6/vmlinuz

append initrd=centos6/initrd.img ks=http://192.168.30.17/ksdir/ks6_mini.cfg

label local

menu label Boot from ^local drive

localboot 0xffff

menu end