定制CentOS 6.0精简的自动安装版

CentOS 6.0 在大家翘首以盼中姗姗来迟，但官方发布的DVD太过于庞大，很多组件其实在日常的生产环境中并用不上，所以基于此种情况，在这里我们就来对官方发布的DVD进行瘦身，只安装我们需要的组件，并实现自动安装，安装完毕后再对系统做基本的初始化，这样在生产环境中需要批量布署服务器的时候，显的效率非常高

1、定制安装系统，选择常用的组件

2、安装制作发行版所需的基本软件包

yum –y install createrepo mkisofs

3、生成安装系统所需的rpm文件列表

awk '/Installing/{print $2}' install.log |sed 's/^[0-9]*://g' >/root/packages.list

4、创建定制工作目录

mkdir -p /mnt/cdrom

mkdir -p /data/OS

mount /dev/cdrom /mnt/cdrom

rsync –a --exclude=Packages /mnt/cdrom /data/OS

mkdir /data/OS/Packages

5、复制精简后的RPM包

vi /data/cprmps.sh #创建自动复制RPM包脚本

#!/bin/bash

DEBUG=0

CentOS_DVD=/mnt/cdrom

ALL_RPMS_DIR=/mnt/cdrom/Packages #源光盘RPM包存放的目录

KOS_RPMS_DIR=/data/OS/Packages #精简后RPM包存放的目录

packages_list=/root/packages.list #精简后的RPM包列表

number_of_packages=`cat $packages_list | wc -l`

i=1

while [ $i -le $number_of_packages ] ; do

line=`head -n $i $packages_list | tail -n -1`

name=`echo $line | awk '{print $1}'`

version=`echo $line | awk '{print $3}' | cut -f 2 -d :`

if [ $DEBUG -eq "1" ] ; then

echo $i: $line

echo $name

echo $version

fi

if [ $DEBUG -eq "1" ] ; then

ls $ALL_RPMS_DIR/$name-$version*

if [ $? -ne 0 ] ; then

echo "cp $ALL_RPMS_DIR/$name-$version* "

fi

else

echo "cp $ALL_RPMS_DIR/$name-$version* $KOS_RPMS_DIR/"

cp $ALL_RPMS_DIR/$name-$version* $KOS_RPMS_DIR/

# in case the copy failed

if [ $? -ne 0 ] ; then

echo "cp $ALL_RPMS_DIR/$name-$version* "

cp $ALL_RPMS_DIR/$name* $KOS_RPMS_DIR/

fi

fi

i=`expr $i + 1`

done

chmod +x cprpm.sh

./cprpm.sh

6、配置kickstart脚本

vi /data/OS/isolinux/kerry.cfg

# Kickstart file automatically generated by anaconda.

#Install OS instead of upgrade

install

#Use text mode install

text

#Use CDROM installation media

cdrom

lang en_US.UTF-8

keyboard us

#Skip the X Configuration

skipx

#Network information

#network --device eth0 --onboot yes --bootproto static --ip 192.168.9.226 --netmask 255.255.255.0 --gateway 192.168.9.1 --nameserver 192.168.9.1 --noipv6 --hostname kerry-web-001

network --bootproto dhcp --noipv6 --onboot=yes --hostname kerry-web-001

#root -- 1q2w3e

rootpw --iscrypted $6$ZVQx8trb4JB693IS$tdwYvbnrNLgAv9xyQTMm2/0IV5pmZWwa0dD.GWh69/LK0Ls4aUXUl3xJiPRyzVuRZDUdEzw0h26zRS5KOdbBl1

firewall --disabled

#System authorization information

authconfig --enableshadow --enablemd5

selinux --disabled

timezone --utc Asia/Shanghai

#System bootloader configuration

bootloader --location=mbr

#Clear the Master Boot Record

zerombr yes

# The following is the partition information you requested

# Note that any partitions you deleted are not expressed

# here so unless you clear all partitions first, this is

# not guaranteed to work

#Partition clearing information

clearpart --all --initlabel

part /boot --fstype ext4 --size=200 --asprimary

part / --fstype ext4 --size=10000

part swap --size=4096

part /data --fstype ext4 --size=1 --grow

#--- Reboot the host after installation is done

reboot

%packages

@base

@core

@development

@server-policy

sgpio

nmap

iptraf

ntp

%post --nochroot

# Mount CDROM

mkdir -p /mnt/cdrom

mount -r -t iso9660 /tmp/cdrom /mnt/cdrom

cp /mnt/cdrom/ipmod.tar.gz /mnt/sysimage/tmp/ipmod.tar.gz > /dev/null

cd /mnt/sysimage/tmp/

tar -zxvf ipmod.tar.gz > /dev/null

cp -R /mnt/sysimage/tmp/ipmod/* /mnt/sysimage/root/ > /dev/null 2>/dev/null

cp -R /mnt/sysimage/tmp/etc/* /mnt/sysimage/etc/ > /dev/null 2>/dev/null

cp -R /mnt/sysimage/tmp/usr/* /mnt/sysimage/usr/ > /dev/null 2>/dev/null

cp -R /mnt/sysimage/tmp/var/* /mnt/sysimage/var/ > /dev/null 2>/dev/null

cp -R /mnt/sysimage/tmp/boot/* /mnt/sysimage/boot/ > /dev/null 2>/dev/null

cp -R /mnt/sysimage/tmp/sbin/* /mnt/sysimage/sbin/ > /dev/null 2>/dev/null

umount /mnt/cdrom

%post

#vim syntax on

sed -i "8 s/^/alias vi='vim'/" /root/.bashrc 2>/dev/null

echo 'syntax on' > /root/.vimrc 2>/dev/null

#init_ssh

ssh_cf="/etc/ssh/sshd_config"

sed -i -e '74 s/^/#/' -i -e '76 s/^/#/' $ssh_cf

sed -i "s/#UseDNS yes/UseDNS no/" $ssh_cf

#client

sed -i -e '44 s/^/#/' -i -e '48 s/^/#/' $ssh_cf

# Remove the ISO File translation files

find / -name TRANS.TBL -exec rm {} \; /dev/null 2>/dev/null

# Remove some unneeded services

#--------------------------------------------------------------------------------

cat << EOF

+--------------------------------------------------------------+

| === Welcome to Tunoff services === |

+--------------------------------------------------------------+

EOF

#---------------------------------------------------------------------------------

for i in `ls /etc/rc3.d/S*`

do

CURSRV=`echo $i|cut -c 15-`

echo $CURSRV

case $CURSRV in

crond | irqbalance | microcode_ctl | network | random | sshd | syslog | local )

echo "Base services, Skip!"

;;

*)

echo "change $CURSRV to off"

chkconfig --level 235 $CURSRV off

service $CURSRV stop

;;

esac

done

# file descriptors

ulimit -HSn 65535

echo -ne "

* soft nofile 65536

* hard nofile 65536

" >>/etc/security/limits.conf

#set sysctl

true > /etc/sysctl.conf

cat >> /etc/sysctl.conf << EOF

net.ipv4.ip_forward = 0

net.ipv4.conf.default.rp_filter = 1

net.ipv4.conf.default.accept_source_route = 0

kernel.sysrq = 0

kernel.core_uses_pid = 1

net.ipv4.tcp_syncookies = 1

kernel.msgmnb = 65536

kernel.msgmax = 65536

kernel.shmmax = 68719476736

kernel.shmall = 4294967296

net.ipv4.tcp_max_tw_buckets = 6000

net.ipv4.tcp_sack = 1

net.ipv4.tcp_window_scaling = 1

net.ipv4.tcp_rmem = 4096 87380 4194304

net.ipv4.tcp_wmem = 4096 16384 4194304

net.core.wmem_default = 8388608

net.core.rmem_default = 8388608

net.core.rmem_max = 16777216

net.core.wmem_max = 16777216

net.core.netdev_max_backlog = 262144

net.core.somaxconn = 262144

net.ipv4.tcp_max_orphans = 3276800

net.ipv4.tcp_max_syn_backlog = 262144

net.ipv4.tcp_timestamps = 0

net.ipv4.tcp_synack_retries = 1

net.ipv4.tcp_syn_retries = 1

net.ipv4.tcp_tw_recycle = 1

net.ipv4.tcp_tw_reuse = 1

net.ipv4.tcp_mem = 94500000 915000000 927000000

net.ipv4.tcp_fin_timeout = 1

net.ipv4.tcp_keepalive_time = 1200

net.ipv4.ip_local_port_range = 1024 65535

EOF

/sbin/sysctl -p

#close ctrl+alt+del

sed -i "s/ca::ctrlaltdel:\/sbin\/shutdown -t3 -r now/#ca::ctrlaltdel:\/sbin\/shutdown -t3 -r now/" /etc/inittab

#set purview

chmod 600 /etc/passwd

chmod 600 /etc/shadow

chmod 600 /etc/group

chmod 600 /etc/gshadow

7、生成comps.xml

cd /data/OS

createrepo –g repodata/*-comps.xml /data/OS/

8、让系统从kickstart配置启动安装

vi /data/OS/isolinux/isolinux.cfg

default auto

label auto

kernel vmlinuz

append ks=cdrom:/isolinux/kerry.cfg initrd=initrd.img

9、生成ISO文件

cd /data/OS

declare -x discinfo=`head -1 .discinfo`

createrepo -u "media://$discinfo" -g repodata/*-comps.xml /data/OS/

mkisofs -R -J -T -r -l -d -joliet-long -allow-multidot -allow-leading-dots -no-bak -o /data/KerryOS-1.0-i386.iso -b isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table /data/OS

10、生成MD5检验码

/usr/bin/implantisomd5 /data/KerryOS-1.0-i386.iso