服务器端使用了 centos 6.0 最小化安装，关闭selinux
- yum install -y nginx dhcp xinetd
将系统ISO镜像文件挂载到/data/iso,并将Nginx 页面目录设置为相应文件夹
配置 tftp
- cat /etc/xinetd.d/tftp
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# default: off
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# description: The tftp server serves files using the trivial file transfer \
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# protocol. The tftp protocol is often used to boot diskless \
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# workstations, download configuration files to network-aware printers, \
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# and to start the installation process for some operating systems.
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service tftp
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{
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socket_type = dgram
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protocol = udp
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wait = yes
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user = root
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server = /usr/sbin/in.tftpd
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server_args = -u nobody -s /data/tftpboot ( tftp跟路径，-u 所有用户可用，-s 是和dhcp套起来使用的)
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disable = no
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per_source = 11
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cps = 100 2
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flags = IPv4
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}
配置 dhcp
- cat /etc/dhcp/dhcpd.conf
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ddns-update-style interim;
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ignore client-updates;
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allow booting;
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allow bootp;
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subnet 10.0.1.0 netmask 255.255.255.0 {
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# --- default gateway
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option routers 10.0.1.1;
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option subnet-mask 255.255.255.0;
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# option nis-domain "domain.org";
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option domain-name "install.org";
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option domain-name-servers 202.101.172.35;
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option domain-name-servers 202.101.172.48;
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option time-offset -18000; # Eastern Standard Time
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# option ntp-servers 192.168.1.1;
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# option netbios-name-servers 192.168.1.1;
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# --- Selects point-to-point node (default is hybrid). Don't change this unless
# -- you understand Netbios very well
# option netbios-node-type 2;
range dynamic-bootp 10.0.1.100 10.0.1.250;
default-lease-time 21600;
max-lease-time 43200;
next-server 10.0.1.1; （tftp服务器IP）
filename "/pxelinux.0"; (在客户端获取IP后，执行的文件，在tftp跟路径处使用 -s ，这里就可用使用相对路径，不然只能写绝对路径)
# we want the nameserver to appear at a fixed address
# host ns {
# next-server marvin.redhat.com;
# hardware ethernet 12:34:56:78:AB:CD;
# fixed-address 207.175.42.254;
# }
}
建立 PXE 目录，拷贝系统启动时加载的文件
- mkdir -p /data/tftpboot/{images,pxelinux.cfg}
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cp /data/iso/isolinux/{boot.msg,splash.jpg,vesamenu.c32} /data/tftpboot/images
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cp /data/iso/isolinux/{vmlinuz,initrd.img} /data/tftpboot/images/centso-5.5_x86_64 (对应default 文件中的 kernel 和 append initrd目录)
下面是一个示例，默认安装 CentOS 5.5 x86_64，可按各自需求修改
- cat /data/tftpboot/pxelinux.cfg/default
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default images/vesamenu.c32
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#prompt 1
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timeout 600
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display images/boot.msg
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#display pxelinux.cfg/list
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menu background images/splash.jpg
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menu title Welcome to Linux installation interface !
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menu color border 0 #ffffffff #00000000
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menu color sel 7 #ffffffff #ff000000
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menu color title 0 #ffffffff #00000000
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menu color tabmsg 0 #ffffffff #00000000
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menu color unsel 0 #ffffffff #00000000
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menu color hotsel 0 #ff000000 #ffffffff
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menu color hotkey 7 #ffffffff #ff000000
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menu color scrollbar 0 #ffffffff #00000000
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label 1
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menu label ^Install CentOS 5.5 x86_64
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menu default
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kernel images/centos-5.5-x86_64/vmlinuz
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append initrd=images/centos-5.5-x86_64/initrd.img
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label 2
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menu label ^Install CentOS 5.6 x86_64
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kernel images/centos-5.6-x86_64/vmlinuz
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append initrd=images/centos-5.6-x86_64/initrd.img
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label 3
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menu label ^Install CentOS 6.0 x86_64
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kernel images/centos-6.0-x86_64/vmlinuz
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append initrd=images/centos-6.0-x86_64/initrd.img
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label rescue (修复模式启动)
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menu label ^Rescue installed system
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kernel images/centos-6.0-x86_64/vmlinuz
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append initrd=images/centos-6.0-x86_64/initrd.img rescue
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label memtest86 (内存测试)
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menu label ^Memory test
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kernel images/memtest
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append -
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