PXE+TFTP+NGINX+Kickstart自动安装脚本

PXE+TFTP+NGINX+Kickstart安装并测试完成，并用脚本实现自动安装PXE环境，脚本介绍如下：

脚本功能： 自动安装配置PXE+TFTP+NGINX+Kickstart环境

运行前提： 将CentOS DVD文件准备好，默认是从光驱挂载并复制

脚本变量： 根据实际情况修改如下变量

HTML_DIR： nginx默认的html目录

NAME_SERVER： dhcpd.conf的domain-name-servers的值

SUBNET： dhcpd.conf的subnet的值

NETMASK： dhcpd.conf的netmask的值

RANG_START： dhcpd.conf的IP地址池开始地址

RANG_END： dhcpd.conf的IP地址池结束地址

NEXT_SERVER： dhcpd.conf的next_server的值

TFTPBOOT_DIR： tftp默认目录

PXELINUX_DIR： pxelinux.cfg目录

BOOT_SIZE： /boot分区大小

SWAP_SIZE： swap大小

ROOT_SIZE： /分区大小， 其余空间为/opt分区

使用注意： PXE环境和生产环境要隔离，并且限制主机的访问，防止有服务器默认从网卡启动，重启后就直接重新安装系统

脚本功能演示：

演示时为了节省时间，没有将iso挂载到光驱，所以找不到iso下面的文件

运行完脚本后，环境就搭建完成，将服务器从PXE启动：

 

脚本代码：

#! /bin/bash
#
# FILE: pxe_kickstart_install.sh
#
# USAGE: ./pxe_kickstart_install.sh
#
# DESCRIPTION: quickly install pxe+tftp+nginx+kickstart, auto install centos 5
#
# AUTHOR: http://waydee.blog.51cto.com/#
# CREATED: 2012-4-24
# VERSION: 1.0



#################### VARIABLES ####################

ISO_MNT="/mnt/iso" #ISO_MNT is CentOS DVD mount dir
G_LEFT="\e[0;32m\033[1m" #G_LEFT and G_RIGHT to echo green strings
G_RIGHT="\e[m" #G_LEFT and G_RIGHT to echo green strings
R_LEFT="\e[0;31m\033[1m" #R_LEFT and R_RIGHT to echo red strings
R_RIGHT="\e[m" #R_LEFT and R_RIGHT to echo red strings
HTML_DIR="/usr/share/nginx/html" #HTML_DIR is nginx / dir,and copy centos dvd to this dir
NAME_SERVER="192.168.2.101" #NAME_SERVER is for dhcpd.conf domain-name-servers
SUBNET="192.168.2.0" #SUBNET is for dhcpd.conf subnet
NETMASK="255.255.255.0" #NETMASK is for dhcpd.conf netmask
RANG_START="192.168.2.220" #RANG_START is for dhcpd.conf range start
RANG_END="192.168.2.225" #RANG_END is for dhcpd.conf rang end
NEXT_SERVER="192.168.2.101" #NEXT_SERVER is for dhcpd.conf next_server
TFTPBOOT_DIR="/var/lib/tftpboot" #tftp boot dir ,default is /var/lib/tftpboot
PXELINUX_DIR="${TFTPBOOT_DIR}/pxelinux.cfg" #pxelinux.cfg dir
BOOT_SIZE="100" #set /boot size
SWAP_SIZE="4096" #set swap size
ROOT_SIZE="40960" #set / size , the rest set to /opt


#################### FUNCTIONS ####################

#check_mnt_dir use to check if ISO_MNT dir exits
check_mnt_dir()
{
 if [ -e ${ISO_MNT} ]
 then
 echo -e "INFO: ${ISO_MNT} dir has ${G_LEFT}exits${G_RIGHT}."
 else
 mkdir -p ${ISO_MNT}
 echo -e "INFO: Create dir ${ISO_MNT} ${G_LEFT}done${G_RIGHT}."
 fi
}




#################### MAIN ####################

#install EPEL
if [ ! -e /etc/yum.repos.d/epel.repo ]
then
 rpm -ivh http://dl.fedoraproject.org/pub/epel/5/i386/epel-release-5-4.noarch.rpm 1>/dev/null
 echo -e "Install EPEL source ${G_LEFT}done${G_RIGHT}."
fi

#install tftp-server system-config-kickstart dhcp syslinux nginx
yum -y install tftp-server system-config-kickstart dhcp syslinux nginx 1>/dev/null
echo -e "INFO: Install RPMS ${G_LEFT}done${G_RIGHT}."

#create mnt dir
check_mnt_dir

#mount DVD image to ISO_MNT
mount -t iso9660 /dev/cdrom ${ISO_MNT} 1>/dev/null
echo -e "INFO: Mount cdrom to ${ISO_MNT} ${G_LEFT}done${G_RIGHT}."

#copy file to html dir
echo -e "INFO: Start to copy CentOS image, this may take severl minitus ..."
cp -a ${ISO_MNT}/* ${HTML_DIR} 1>/dev/null
echo -e "INFO: Copy Centos DVD ${G_LEFT}done${G_RIGHT}."

#config dhcp server
cat>/etc/dhcp/dhcpd.conf<<EOF
option domain-name-servers ${NAME_SERVER};
max-lease-time 7200;
authoritative;

subnet ${SUBNET} netmask ${NETMASK} {
range ${RANG_START} ${RANG_END};
next-server ${NEXT_SERVER};
filename "pxelinux.0";
}
EOF

echo -e "INFO: Config DHCP ${G_LEFT}done${G_RIGHT}."

#start dhcp server
service dhcpd restart 1>/dev/null
sleep 2

#check if dhcpd is started
ps aux|grep dhcpd|grep -v grep 1>/dev/null
DHCP_STATUS=$?
if [[ ${DHCP_STATUS} == 1 ]]
then
 echo -e "ERROR: DHCPD start ${R_LEFT}Failed${R_RIGHT}."
 exit 1
else
 echo -e "INFO: DHCPD start ${G_LEFT}OK${G_RIGHT}."
fi

#turn on tftp
sed -i 's/disable.*$/disable =no/' /etc/xinetd.d/tftp
echo -e "INFO: TFTP turn on ${G_LEFT}OK${G_RIGHT}."

#restart xinetd service
service xinetd restart 1>/dev/null
echo -e "INFO: Xinetd restart ${G_LEFT}OK${G_RIGHT}.."

#create pxelinux.cfg dir
if [ -e ${PXELINUX_DIR} ]
then
 echo -e "INFO: ${PXELINUX_DIR} dir has ${G_LEFT}exits${G_RIGHT}."
else
 mkdir -p ${PXELINUX_DIR}
 echo -e "INFO: Create dir ${PXELINUX_DIR} ${G_LEFT}done${G_RIGHT}."
fi

#copy initrd.img vmlinuz pxelinux.0
cp -a ${ISO_MNT}/images/pxeboot/initrd.img ${TFTPBOOT_DIR}
echo -e "INFO: Copy initrd.img to ${TFTPBOOT_DIR} ${G_LEFT}done${G_RIGHT}."

cp -a ${ISO_MNT}/images/pxeboot/vmlinuz ${TFTPBOOT_DIR}
echo -e "INFO: Copy vmlinuz to ${TFTPBOOT_DIR} ${G_LEFT}done${G_RIGHT}."

cp -a /usr/share/syslinux/pxelinux.0 ${TFTPBOOT_DIR}
echo -e "INFO: Copy pxelinux.0 to ${TFTPBOOT_DIR} ${G_LEFT}done${G_RIGHT}."


#config pxelinux.cfg file default
cat>${PXELINUX_DIR}/default<<EOF
default ks
prompt 1
timeout 600
display boot.msg
F1 boot.msg
F2 options.msg
F3 general.msg
F4 param.msg
F5 rescue.msg
label linux
 kernel vmlinuz
 append initrd=initrd.img
label text
 kernel vmlinuz
 append initrd=initrd.img text
label ks
 menu default
 kernel vmlinuz
 append initrd=initrd.img ksdevice=eth0 ks=http://${NAME_SERVER}/ks.cfg
label local
 localboot 1
 label memtest86
 kernel memtest
append -
EOF
echo -e "INFO: pxelinux.cfg/default ${TFTPBOOT_DIR} ${G_LEFT}done${G_RIGHT}."

#config ks.cf file
cat>${HTML_DIR}/ks.cfg<<EOF
#platform=x86, AMD64, or Intel EM64T
#version=DEVEL
# Firewall configuration
firewall --enabled --http --ssh
# Install OS instead of upgrade
install
# Use hard drive installation media
#harddrive --dir=/ --partition=/dev/sdb1
url --url=http://${NAME_SERVER}/
# Root password
rootpw --iscrypted $1$kBe14BGG$GEWFllYBwDpMn055nK7Jk0
# System authorization information
auth --useshadow --passalgo=sha512
# Use text mode install
text
# System keyboard
keyboard us
# System language
lang en_US
# SELinux configuration
selinux --disabled
# Do not configure the X Window System
skipx
# Installation logging level
logging --level=info
# Reboot after installation
reboot
# System timezone
timezone Asia/Shanghai
# Network information
network --bootproto=dhcp --device=eth0 --onboot=on
# System bootloader configuration
bootloader --location=mbr
# Partition clearing information
clearpart --all
# Disk partitioning information
part /boot --asprimary --fstype="ext3" --size=${BOOT_SIZE}
part swap --fstype="swap" --size=${SWAP_SIZE}
part / --fstype="ext3" --size=${ROOT_SIZE}
part /opt --fstype="ext3" --grow --size=1

%packages
@base
@core
imake
keyutils
trousers
fipscheck
device-mapper-multipath
@development-libs
@admin-tools
@system-tools
@chinese-support
@text-internet
EOF
echo -e "INFO: ks.cfg config ${TFTPBOOT_DIR} ${G_LEFT}done${G_RIGHT}."

#restart nginx
service nginx restart 2>&1 >/dev/null
sleep 2

ps aux|grep nginx|grep -v grep 1>/dev/null
NGINX_STATUS=$?
if [[ ${NGINX_STATUS} == 1 ]]
then
 echo -e "ERROR: nginx start ${R_LEFT}Failed${R_RIGHT}."
 exit 1
else
 echo -e "INFO: nginx start ${G_LEFT}OK${G_RIGHT}."
fi

#pxe_kickstart_install done
echo -e "INFO: PXE+TFTP+NGINX+Kickstart has been installed ${G_LEFT}SUCCESS${G_RIGHT}."

Kickstart创建LVM命令

 

# Disk partitioning information

 part /boot --fstype="ext3" --size=100

 part pv.01 --size=1 --grow

 volgroup vg_root pv.01

 logvol / --vgname=vg_root --size=30720 --name=lv_root

 logvol swap --vgname=vg_root --size=32768 --name=lv_swap

 logvol /opt --vgname=vg_root --size=1 --grow --name=lv_opt