pxe网络安装centos系统
<p>安装系统的方法很多方法，有从硬盘、usb、光盘、网络，方法很多种，今天提到的是网络安装，网络安装的方法很多，有KickStart、pxe等等，如下便是使用pxe安装系统，文章从运维生存时间群友的博客转过来的。</p><p>分为如下几个步骤，比较简单，但是安装比较繁琐。</p>
<p><strong>1. 安装配置dhcp</strong></p>
<p><span>1.1 安装dhcp</span></p><pre class="brush:bash;toolbar:false"># yum install dhcp</pre><p><span>1.2 配置dhcp</span></p><pre class="brush:bash;toolbar:false"># vi /etc/dhcp/dhcpd.conf
# default-lease-time 600;
# max-lease-time 7200;
ddns-update-style none;
log-facility local7;
next-server 192.168.1.1; //指定tftp服务器ip，该ip地址这里指定本机地址
filename "pxelinux.0"; //指定引导文件
subnet 192.168.1.0 netmask 255.255.255.0 {
range dynamic-bootp 192.168.1.10 192.168.1.100; //设置dhcp作用域范围
# option domain-name-servers 8.8.8.8;
# option routers 192.168.1.1;
option subnet-mask 255.255.255.0;
option broadcast-address 192.168.1.255;
default-lease-time 600;
max-lease-time 7200;
}</pre><p> </p>
<p><strong>2. 安装配置tftp</strong></p>
<p><span>2.1 安装tfpt</span></p><pre class="brush:bash;toolbar:false"># yum install tftp-server</pre><p><span>2.2 配置tftp</span></p><pre class="brush:bash;toolbar:false"># vim /etc/xinetd.d/tftp
service tftp
{
socket_type = dgram
protocol = udp
wait = yes
user = root
server = /usr/sbin/in.tftpd
server_args = -s /var/lib/tftpboot //设置tftp的根目录
disable = no //这里原来是yes要改成no
per_source = 11
cps = 100 2
flags = IPv4
}</pre><p> </p><pre class="brush:bash;toolbar:false">cd /var/lib/tftp
mkdir pxelinux.cfg</pre><p>挂载系统关盘到/mnt/cdrom目录下</p><pre class="brush:bash;toolbar:false"># mount /dev/cdrom /mnt/cdrom
# cp /mnt/cdrom/images/*.img /var/lib/tftpboot
# cp /mnt/cdrom/isolinux/boot.msg /var/lib/tftpboot
# cp /mnt/cdrom/isolinux/initrd.img /var/lib/tftpboot
# cp /mnt/cdrom/isolinux/vesamenu.c32 /var/lib/tftpboot
# cp /mnt/cdrom/isolinux/vmlinuz /var/lib/tftpboot
# cp /mnt/cdrom/isolinux/isolinux.cfg /var/lib/tftpboot/pxelinux.cfg/default
# chmod -R 755 /var/lib/tftpboot //让tftp目录下的所有文件有执行权限
#chmod 777 /var/lib/tftpboot/pxelinux.cfg/default</pre><p>获取pxelinux.0 引导文件</p><pre class="brush:bash;toolbar:false"># yum install syslinux
# rpm -qa | grep syslinux
# rpm -ql syslinux-4.02-7.el6.x86_64 | grep pxelinux.0 //查找 pxelinux.0所在位置
# cp /usr/share/syslinux/pxelinux.0 /var/lib/tftpboot/</pre><p><strong>3. 配置apache</strong><br>
在任意的虚拟主机或者默认主机中添加一个虚拟目录指向关盘挂载目录, 或者大家配置nfs、ftp也可以，这边还是用HTTP来做演示</p><pre class="brush:bash;toolbar:false"># vim /usr/local/apache2/conf/extra/httpd-vhosts.conf
Alias /iso "/mnt/cdrom/"
<Directory "/mnt/cdrom">
AllowOverride None
Options Indexes FollowSymLinks
Require all granted
Order Deny,Allow
Deny From all
Allow From 192.168.1.0/24
</Directory></pre><p> </p>
<p><strong>4. 启动关闭服务</strong></p>
<p><span>4.1 启动dhcp和tftp</span></p><pre class="brush:bash;toolbar:false"># service dhcpd start
# service xinetd start</pre><p><span> 4.2 关闭selinux和iptables</span></p><pre class="brush:bash;toolbar:false"># set enforce0
# service iptables stop</pre><p><strong>5. 安装操作系统</strong><br>
从网络安装即可，各自服务器网络启动方式不同，这边不再敖述，在选择安装源的步骤填http://192.168.1.1/iso</p>
<p>转自：http://www.zhengdazhi.com/index.php/centos6-3-pxe%E5%AE%89%E8%A3%85%E7%B3%BB%E7%BB%9F/</p>
<p>整理：运维生存时间</p>
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