最近公司里要搞自动安装，我就研究了pxe，也从网上参考了不少资料，这里做了一些简单的整理，文字表达功底比较有限，大家别拍砖啊，呵呵
准备：
1，在VMware中安装了一个CentOS63（CentOS6.4系统，IP : 192.168.202.131）
2，在VMware中创建了一个CentOS65（空机器，未装操作系统）
3，CentOS镜像文件挂载在CentOS63的/media/CentOS_6.4_Final位置
操作步骤：
一，配置DHCP
1，安装dhcpd
yum install dhcp
2，修改dhcp配置文件/etc/dhcp/dhcpd.conf
ddns-update-style interim;
ignore client-updates;
allow booting;
allow bootp;
subnet 192.168.202.0 netmask 255.255.255.0 {
range 192.168.202.200 192.168.202.220;
option routers 192.168.202.131;
option subnet-mask 255.255.255.0;
default-lease-time 21600;
max-lease-time 43200;
next-server 192.168.202.131;
filename "pxelinux.0";
}
3，启动dhcpd
chkconfig --add dhcpd
service dhcpd start
使用命令可以看到dhcpd绑定了多个端口
[root@localhost init.d]# netstat -anp | grep dhcpd
udp 0 0 0.0.0.0:67 0.0.0.0:* 3266/dhcpd
raw 0 0 0.0.0.0:1 0.0.0.0:* 7 3266/dhcpd
unix 2 [ ] DGRAM 18034 3266/dhcpd
注意：第2行raw表示绑定在ICMP协议上，协议号为1
二，配置TFTP
4，安装TFTP
yum install tftp-server
5，修改tftpd配置文件/etc/xinetd.d/tftp，ftp根目录为/var/lib/tftpboot
service tftp
{
socket_type = dgram
protocol = udp
wait = yes
user = root
server = /usr/sbin/in.tftpd
server_args = -s /var/lib/tftpboot
disable = no
per_source = 11
cps = 100 2
flags = IPv4
}
6，启动tftp服务（端口69）
/etc/init.d/xinetd restart
三，配置引导内核
7，下载pxe引导配置文件
yum install syslinux
cp `rpm -ql syslinux | grep '/pxelinux.0'` /var/lib/tftpboot
8，拷贝网络启动的内核文件
cp /media/CentOS_6.4_Final/images/pxeboot/{vmlinuz,initrd.img} /var/lib/tftpboot
mkdir /var/lib/tftpboot/pxelinux.cfg
cp /media/CentOS_6.4_Final/isolinux/isolinux.cfg /var/lib/tftpboot/pxelinux.cfg/default
修改default文件：
default linux
prompt 1
timeout 60
display boot.msg
menu background splash.jpg
menu title Welcome to CentOS 6.4!
menu color border 0 #ffffffff #00000000
menu color sel 7 #ffffffff #ff000000
menu color title 0 #ffffffff #00000000
menu color tabmsg 0 #ffffffff #00000000
menu color unsel 0 #ffffffff #00000000
menu color hotsel 0 #ff000000 #ffffffff
menu color hotkey 7 #ffffffff #ff000000
menu color scrollbar 0 #ffffffff #00000000
label linux
menu label ^Install or upgrade an existing system
menu default
kernel vmlinuz
append ks=http://192.168.202.131/ks.cfg initrd=initrd.img
四，配置kickstart
9，安装nginx，根目录/usr/local/nginx/html
yum install nginx
chkconfig --add nginx
service nginx start
10，拷贝操作系统源文件
mkdir /usr/local/nginx/html/dvd
cp -R /media/CentOS_6.4_Final/* /usr/local/nginx/html/dvd/
11，下载kickstart
yum install system-config-kickstart
cp /root/anaconda-ks.cfg /usr/local/nginx/html/ks.cfg
chmod 755 /usr/local/nginx/html/ks.cfg （不分配权限，外部无法通过http访问，会报403）
修改ks.cfg:
#platform=x86, AMD64, or Intel EM64T
#version=DEVEL
# Firewall configuration
firewall --disabled
# Install OS instead of upgrade
install
# Use text install
text
# Use network installation
url --url="http://192.168.202.131/dvd"
# Root password
rootpw --iscrypted $1$.IvWB.Gl$E4fI4Ez4Z8HyHRCZW5Btr0
# System authorization information
auth --useshadow --passalgo=sha512
# Run the Setup Agent on first boot
firstboot --reconfig
# System keyboard
keyboard us
# System language
lang zh_CN.UTF-8
# SELinux configuration
selinux --enforcing
# Installation logging level
logging --level=info
# System timezone
timezone Asia/Shanghai
# Network information
network --bootproto=dhcp --device=eth0 --onboot=yes
# System bootloader configuration
bootloader --location=mbr
# Clear the Master Boot Record
zerombr
# Partition clearing information
clearpart --all
# Disk partitioning information
part /boot --fstype="ext4" --size=200
part swap --fstype="swap" --size=1000
part / --fstype="ext4" --grow --size=1
# Reboot after installation
reboot
%packages
@base
@core
gcc
%end
五，验证