PXE安装redhat系统

由于这边大部分是redhat，所以在安装PXE服务器的时候需要有些更改。Centos不需要更新源。

首先是编辑源文件
mv /etc/yum.repos.d/rhel-debuginfo.repo  /etc/yum.repos.d/rhel-debuginfo.repo.bak

vi /etc/yum.repos.d/rhel-debuginfo.repo
[base]
name=Red Hat Enterprise Linux 5 -Base
baseurl=
gpgcheck=1
[update]
name=Red Hat Enterprise Linux 5 -Updates
baseurl=
gpgcheck=1
[extras]
name=Red Hat Enterprise Linux 5 -Extras
baseurl=
gpgcheck=1
[addons]
name=Red Hat Enterprise Linux 5 -Addons
baseurl=
gpgcheck=1


rpm --import 


然后是安装需要的程序 
yum install dhcp httpd tftp-server syslinux

接着是编辑各程序的配置文件
DHCP：
 cat /etc/dhcpd.conf 
ddns-update-style interim;
ignore client-updates;

subnet 10.0.7.0 netmask 255.255.255.0 {

# --- default gateway
	option routers			10.0.7.77;
	option subnet-mask		255.255.255.0;
	option time-offset		-18000;	
	
	filename	"pxelinux.0";	
	next-server	10.0.7.77;

	range dynamic-bootp 10.0.7.80 10.0.7.200;
	default-lease-time 21600;
	max-lease-time 43200;

}


TFTP：这里就是把disable改成no，然后创建目录/tftpboot/pxelinux.cfg/
cat /etc/xinetd.d/tftp 
# default: off
# description: The tftp server serves files using the trivial file transfer \
#	protocol.  The tftp protocol is often used to boot diskless \
#	workstations, download configuration files to network-aware printers, \
#	and to start the installation process for some operating systems.
service tftp
{
	socket_type		= dgram
	protocol		= udp
	wait			= yes
	user			= root
	server			= /usr/sbin/in.tftpd
	server_args		= -s /tftpboot
	disable			= no
	per_source		= 11
	cps			= 100 2
	flags			= IPv4
}



完成这些后在/vqr/www/html下创建文件夹rh57。  然后把iso文件mount上。mount -o loop /root/rh57.iso /var/www/html/rh57
现在就开始编辑自动应答文件ks.cfg
#Kickstart file automatically generated by anaconda.

install
text
url --url 
lang en_US.UTF-8
keyboard us
network --device eth0 --bootproto dhcp --onboot=on
rootpw aaaaaa
firewall --enabled --port=22:tcp --port=22:tcp
authconfig --enableshadow --enablemd5
selinux --disabled
timezone Asia/Shanghai
reboot
bootloader --location=mbr --driveorder=sda --append="rhgb quiet"
clearpart --all --initlabel --drives=sda
part / --fstype ext3 --size=10000 --ondisk=sda
part swap --size=1600 --ondisk=sda
#part /opt   --fstype ext3 --size=100 --grow --ondisk=sda
%packages
@admin-tools
@base
@core
@development-libs
@development-tools
@editors
@graphical-internet
@legacy-network-server
@legacy-software-development
@legacy-software-support
@network-server
@server-cfg
@system-tools
@base-x
keyutils
kexec-tools
iscsi-initiator-utils
trousers
fipscheck
device-mapper-multipath
perl-Convert-ASN1
imake
audit


编辑完成后，把相关的启动文件cp到tftp目录里。

cp /usr/share/syslinux/pxelinux.0  /tftpboot
cd /var/www/html/rh57/isolinux
cp vmlinuz /tftpboot/
cp initrd.img /tftpboot/
cp boot.* /tftpboot/
cp isolinux.cfg /tftpboot/pexlinux.cfg/default

编辑default文件
default ks
prompt 1
timeout 600
display boot.msg
F1 boot.msg
F2 options.msg
F3 general.msg
F4 param.msg
F5 rescue.msg
label linux
  kernel vmlinuz
  append initrd=initrd.img
label text
  kernel vmlinuz
  append initrd=initrd.img text
label local
  localboot 1
label memtest86
  kernel memtest
  append -
label ks
 kernel vmlinuz
 append ks= initrd=initrd.img


最后启动相关服务，可以用ps来检查一下是否启动
service httpd restart
service dhcpd restart
service xinetd restart



需要安装系统的服务器只是开机、网络启动即可。