PXE是什么
preboot excution environment即预启动执行环境
在CentOS上的部署
- dhcp (ip/netmask, gw, dns; filename, next-server;)
- tftp server (bootloader, kernel, initrd)
- kickstart
配置tftp server
端口是:69/udp
CentOS 6:
chkconfig tftp on
service xinetd restart
CentOS 7:
systemctl start tftp.socket
默认的文件根目录：/var/lib/tftpboot/
dhcp server:
配置示例
option domain-name "magedu.com";
option routers 192.168.10.9;
option domain-name-servers 172.18.0.1;
default-lease-time 43200;
max-lease-time 86400;
log-facility local7;
subnet 192.168.10.0 netmask 255.255.255.0 {
range 192.168.10.101 192.168.10.120;
filename "pxelinux.0";
next-server 192.168.10.9;
}
配置PXE环境
CentOS 7
yum -y install syslinux
cp /usr/share/syslinux/pxelinux.0 /var/lib/tftpboot/
cp /media/cdrom/images/pxeboot/{vmlinuz,initrd.img} /var/lib/tftpboot
cp /usrshare/systelinux/{chain.c32,mboot.c32,menu.c32,memdisk} /var/lib/tftpboot
mkdir /var/lib/tftpboot/pxelinux.cfg/
vim /var/lib/tftpboot/pxelinux.cfg/default
default menu.c32
prompt 5
timeout 30
MENU TITLE CentOS 7 PXE Menu
LABEL linux
MENU LABEL Install CentOS 7 x86_64
KERNEL vmlinuz
APPEND initrd=initrd.img inst.repo=http://192.168.10.9/centos/7/x86_64
LABEL linux_autoinst
MENU LABEL Install CentOS 7 x86_64 auto
KERNEL vmlinuz
APPEND initrd=initrd.img inst.repo=http://192.168.10.9/centos/7/x86_64 ks=http://192.168.10.9/kickstarts/centos7.cfg
CentOS 6
yum -y install syslinux
cp /usr/share/syslinux/pxelinux.0 /var/lib/tftpboot/
cp /media/cdrom/images/pxeboot/{vmlinuz,initrd.img} /var/lib/tftpboot/
cp /media/cdrom/isolinux/{boot.msg,vesamenu.c32,splash.png} /var/lib/tftpboot
mkdir /var/lib/tftpboot/pxelinux.cfg/
cp /media/cdrom/isolinux/isolinux.cfg /var/lib/tftpboot/pxelinux.cfg/default
内容如下所示
display boot.msg
menu background splash.jpg
menu title Welcome to CentOS 6.7 MageEdu!
menu color border 0 #ffffffff #00000000
menu color sel 7 #ffffffff #ff000000
menu color title 0 #ffffffff #00000000
menu color tabmsg 0 #ffffffff #00000000
menu color unsel 0 #ffffffff #00000000
menu color hotsel 0 #ff000000 #ffffffff
menu color hotkey 7 #ffffffff #ff000000
menu color scrollbar 0 #ffffffff #00000000
label autoinst
menu label ^Auto Install CentOS
menu default
kernel vmlinuz
append initrd=initrd.img ks=ftp://192.168.10.16/pub/centos6.cfg
label linux
menu label ^Install or upgrade an existing system
kernel vmlinuz
append initrd=initrd.img
label vesa
menu label Install system with ^basic video driver
kernel vmlinuz
append initrd=initrd.img nomodeset
label rescue
menu label ^Rescue installed system
kernel vmlinuz
append initrd=initrd.img rescue
label local
menu label Boot from ^local drive
localboot 0xffff
label memtest86
menu label ^Memory test
kernel memtest
append -