PXE安装linux操作系统

1. 
   sed -i "s#=enforcing#=disabled#g"        /etc/selinux/config  #关闭selinux
   setenforce  0                                                 #禁止selinux
   service iptables stop                                         #禁止防火墙
   yum install  dhcp tftp-server syslinux httpd system-config-kickstart  -y         #安装软件包
   
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   2.
   编辑dhcp的配置文件：
     yum -y install vim
     vim /etc/dhcp/dhcpd.conf
   
   ddns-update-style none;
   default-lease-time 259200;
   max-lease-time 518400;
   option routers 172.16.0.1;
   option domain-name-servers 172.16.0.1;
   subnet 172.16.0.0 netmask 255.255.255.0 {
           range 172.16.0.80 172.16.0.89;
           option subnet-mask 255.255.255.0;
           next-server 172.16.0.70;      获取这个pxelinux.0 文件的tftp服务器地址
           filename "pxelinux.0";
   }
   
   service   dhcpd restart
   netstat -antup | grep dhcpd
   chkconfig  dhcpd on
   service  dhcpd  start
   lsof -i udp:67
   
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   3.
   编辑tftp的配置文件
   vim /etc/xinetd.d/tftp
   将配置文件中的
   disable = no
   service  xinetd  restart
   cat /etc/services | grep tftp
   netstat -anplut | grep  :69
   chkconfig xinetd on
   ----------------------------------------------------------------------------------------------
   4.
   
   rm -rf /var/lib/tftpboot/*
   mkdir /var/lib/tftpboot/pxelinux.cfg
   mount /dev/sr0 /mnt
   cp /usr/share/syslinux/pxelinux.0 /var/lib/tftpboot/
   cp /mnt/isolinux/* /var/lib/tftpboot/
   cp /mnt/isolinux/isolinux.cfg /var/lib/tftpboot/pxelinux.cfg/default
   chmod 644 /var/lib/tftpboot/pxelinux.cfg/default
   
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   5.
   vim /var/lib/tftpboot/pxelinux.cfg/default
   将
   timeout 600
   改为
   timeout 10
   搜索：
   label linux
   将
   append initrd=initrd.img
   改为
   append  initrd=initrd.img ks=http://172.16.0.70/ks.cfg
   6.
   启动 httpd
   /etc/init.d/httpd start
   chkconfig --level 35 httpd on
   mkdir /var/www/html/centos6
   mount /dev/cdrom /var/www/html/centos6
   service   httpd start
   lsof -i tcp:80;netstat -anplut| grep httpd
   7.
   yum groupinstall "X Window System"
   yum groupinstall "GNOME Desktop Environment"
   startX
   system-config-kickstart
   生成ks.cfg文件保存至/var/www/html 目录下
   这里给出一个ks.cfg示例文件
   

   centos7   PXE装机

   1.
   setenforce 0
   systemctl stop firewalld
   yum install -y dhcp tftp-server syslinux httpd system-config-kickstart
   ----------------------------------------------------------------------------------------------
   2.编辑dhcp的配置文件：
   
     vim /etc/dhcp/dhcpd.conf
   
     subnet 172.16.0.0 netmask 255.255.255.0 {
     range 172.16.0.140 172.16.0.150;
     option domain-name-servers 172.16.0.1;
     option routers 172.16.0.1;
     option broadcast-address 172.16.0.255;
     default-lease-time 3600;
     max-lease-time 7200;
     next-server 172.16.0.61;  #寻找tftp服务器 /pxelinux.0
     filename "/pxelinux.0";
   }
   systemctl restart dhcpd
   netstat -antup | grep dhcpd
   systemctl enable dhcpd
   systemctl start dhcpd
   lsof -i udp:67
   ----------------------------------------------------------------------------------------------
   3.编辑tftp的配置文件
   
   vim /etc/xinetd.d/tftp
   将配置文件中的
   disable = no
   systemctl restart xinetd
   cat /etc/services | grep tftp
   netstat -anplut | grep  :69
   ----------------------------------------------------------------------------------------------
   4.
   rm -rf /var/lib/tftpboot/*
   mkdir /var/lib/tftpboot/pxelinux.cfg/
   cp /usr/share/syslinux/pxelinux.0 /var/lib/tftpboot/
   mount /dev/sr0 /mnt
   cp -a /mnt/isolinux/* /var/lib/tftpboot/
   cp /mnt/isolinux/isolinux.cfg /var/lib/tftpboot/pxelinux.cfg/default
   chmod 644 /var/lib/tftpboot/pxelinux.cfg/default
   ----------------------------------------------------------------------------------------------
   5.
   vim /var/lib/tftpboot/pxelinux.cfg/default
   将
   default vesamenu.c32
   timeout 600
   改为
   default linux
   timeout 60
   搜索：
   label linux
   将
   append initrd=initrd.img inst.stage2=hd:LABEL=RHEL-7.0\x20Server.x86_64 rd.live.check quiet
   改为
   append initrd=initrd.img ks=http://192.168.20.61/ks.cfg  inst.repo=http://192.168.20.61/rhel7  quiet
   
   6.启动 httpd
   mkdir -v /var/www/html/rhel7
   mount /dev/cdrom /var/www/html/rhel7
   systemctl enable httpd
   systemctl start httpd
   lsof -i tcp:80
   systemctl umask httpd;systemctl restart httpd;systemctl enable  httpd;netstat -anplut| grep httpd
   
   7.用system-config-kickstart生成ks.cfg文件放到/var/www/html下
   本文提供一个ks.cfg文件供测试使用