pxe安装centos6、centos7、centos8系统

一、将centos6、7、8镜像依次连接到虚拟机上

二、关闭此虚拟机上SELinux和防火墙

三、下载http、rftp、dhcp服务并开启

[14:53:30 root@yp ~]#yum -y install http tftp-server dhcp-server  syslinux-nonlinux

[14:55:49 root@yp ~]#systemctl enable --now httpd tftp dhcp

四、配置dhcp文件

[14:56:26 root@yp ~]#vi /etc/dhcp/dhcpd.conf
#
option domain-name "example.org"; # 域名自动补全
option domain-name-servers 180.76.76.76, 223.5.5.5; #DNS地址

default-lease-time 86400; #租期秒
max-lease-time 172800; #最长租期

log-facility local7;


subnet 10.0.0.0 netmask 255.255.255.0 {
    
    
    range 10.0.0.100 10.0.0.150; #DHCP地址范围
    option routers 10.0.0.2; #网关
    next-server 10.0.0.18; #TFTP服务器地址
    filename "pxelinux.0"; #bootloader启动文件名称
}
~
~

五、准备yum源和相关目录

[15:07:19 root@yp ~]#mkdir /var/www/html/centos/{6,7,8}/os/x86_64
[15:09:32 root@yp ~]#mount /dev/sr0 /var/www/html/centos/8/os/x86_64/
[15:09:32 root@yp ~]#mount /dev/sr1 /var/www/html/centos/7/os/x86_64/
[15:09:32 root@yp ~]#mount /dev/sr2 /var/www/html/centos/6/os/x86_64/

六、制作centos6、centos7、centos8的kickstart应答文件

制作方式参考之前文章

[16:28:38 root@yp ~]#ls /var/www/html/ksdir/
ks6.cfg  ks7.cfg  ks8.cfg

七、拷贝TFTP所需文件

cd /var/lib/tftpboot/
[15:58:52 root@yp tftpboot]#cp /misc/cd/isolinux/vmlinuz .
[15:58:52 root@yp tftpboot]#cp /misc/cd/isolinux/initrd.img .[15:52:58 root@yp ~]#cp /usr/share/syslinux/menu.c32 .
[15:58:52 root@yp tftpboot]#cd /misc/cd/isolinux/
[15:57:16 root@yp isolinux]#cp ldlinux.c32  libcom32.c32  libutil.c32 /var/lib/tftpboot/
[15:58:46 root@yp isolinux]#cd /var/lib/tftpboot/
[15:58:52 root@yp tftpboot]#mkdir pxelinux.cfg
[16:01:34 root@yp tftpboot]#cp /data/iso/isolinux/isolinux.cfg  pxelinux.cfg/default
[16:15:08 root@yp ~]#tree /var/lib/tftpboot/
/var/lib/tftpboot/
├── centos6
│   ├── initrd.img
│   └── vmlinuz
├── centos7
│   ├── initrd.img
│   └── vmlinuz
├── centos8
│   ├── initrd.img
│   └── vmlinuz
├── ldlinux.c32
├── libcom32.c32
├── libutil.c32
├── menu.c32
├── pxelinux.0
└── pxelinux.cfg
    └── default

八、修改启动菜单

[16:32:00 root@yp ~]#vi /var/lib/tftpboot/pxelinux.cfg/default
default menu.c32
timeout 60


menu title CentOS Linux 8.0.1905

label linux 6
  menu label Auto Install CentOS Linux ^6
  kernel centos6/vmlinuz
  append initrd=centos6/initrd.img ks=http://10.0.0.18/ksdir/ks6.cfg

label linux 7
  menu label Auto Install CentOS Linux ^7
  kernel centos7/vmlinuz
  append initrd=centos7/initrd.img ks=http://10.0.0.18/ksdir/ks7.cfg

label linux 8
  menu label Auto Install CentOS Linux ^8
  kernel centos8/vmlinuz
  append initrd=centos8/initrd.img ks=http://10.0.0.18/ksdir/ks8.cfg




label rescue
  menu label ^Rescue a CentOS Linux system 6
  kernel centos6/vmlinuz
  append initrd=centos6/initrd.img inst.repo=http://10.0.0.18/centos/6/os/x86_64/  rescue quiet
label rescue
  menu label ^Rescue a CentOS Linux system 7
  kernel centos7/vmlinuz
  append initrd=centos7/initrd.img inst.repo=http://10.0.0.18/centos/7/os/x86_64/  rescue quiet

label rescue
  menu label ^Rescue a CentOS Linux system 8
  kernel centos8/vmlinuz
  append initrd=centos8/initrd.img inst.repo=http://10.0.0.18/centos/8/os/x86_64/  rescue quiet



label local
  munu default
  menu label Boot from ^local drive
  localboot 0xffff

正在安装