Linux pxe boot | Linux LAN Boot | Cent OS Network Boot

Below details of my Setup :

o Server IP = 172.16.1.100
o Host name = pxe.example.com
o OS = CentOS 7.x
o SELinux = enabled
o Firewall = enabled

Step 1:
yum install dhcp tftp tftp-server syslinux vsftpd xinetd -y

Step 2:
[root@pxe ~]#gedit /etc/dhcp/dhcpd.conf

# DHCP Server Configuration file.
ddns-update-style interim;
ignore client-updates;
authoritative;
allow booting;
allow bootp;
allow unknown-clients;
# internal subnet for my DHCP Server
subnet 172.16.1.0 netmask 255.255.255.0 {
range 172.16.1.101 172.16.1.200;
option domain-name-servers 172.16.1.100;
option domain-name “pxe.example.com”;
option routers 172.16.1.100;
option broadcast-address 172.16.1.255;
default-lease-time 600;
max-lease-time 7200;
# IP of PXE Server
next-server 172.16.1.100;
filename “pxelinux.0”;
}

Step:3
Edit and Config tftp server (/etc/xinetd.d/tftp)
[root@pxe ~]#gedit /etc/xinetd.d/tftp

change the parameter ‘disable = yes‘ to ‘disable = no’

Step:4
All the network boot related files are to be placed in tftp root directory “/var/lib/tftpboot”
Run the following commands to copy required network boot files in ‘/var/lib/tftpboot/’

[root@pxe ~]# cp -v /usr/share/syslinux/pxelinux.0 /var/lib/tftpboot
[root@pxe ~]# cp -v /usr/share/syslinux/menu.c32 /var/lib/tftpboot
[root@pxe ~]# cp -v /usr/share/syslinux/memdisk /var/lib/tftpboot
[root@pxe ~]# cp -v /usr/share/syslinux/mboot.c32 /var/lib/tftpboot
[root@pxe ~]# cp -v /usr/share/syslinux/chain.c32 /var/lib/tftpboot
[root@pxe ~]# mkdir /var/lib/tftpboot/pxelinux.cfg
[root@pxe ~]# mkdir /var/lib/tftpboot/networkboot

Step :5
Mount CentOS 7.x ISO file and copy its contents to local ftp server

[root@pxe ~]# mount -o loop CentOS-7-x86_64-DVD-1511.iso /mnt/
[root@pxe ~]# cd /mnt/
[root@pxe mnt]# cp -rf * /var/ftp/pub/

Step :6
Copy Kernel file (vmlimz) and initrd file from mounted iso file to ‘/var/lib/tftpboot/networkboot/’

[root@pxe ~]# cp /mnt/images/pxeboot/vmlinuz /var/lib/tftpboot/networkboot/
[root@pxe ~]# cp /mnt/images/pxeboot/initrd.img /var/lib/tftpboot/networkboot/

Step :7
Create a PXE menu file (/var/lib/tftpboot/pxelinux.cfg/default), copy the following contents into the pxe menu file.

[root@pxe ~]#gedit /var/lib/tftpboot/pxelinux.cfg/default

default menu.c32
prompt 0
timeout 30
MENU TITLE IT-ASSIST PXE Menu
LABEL centos7_x64
MENU LABEL CentOS 7_X64
KERNEL /networkboot/vmlinuz
APPEND initrd=/networkboot/initrd.img inst.repo=ftp://172.168.1.100/pub

Step :8
Start and enable xinetd, dhcp and vsftpd service

[root@pxe ~]# systemctl start xinetd
[root@pxe ~]# systemctl enable xinetd
[root@pxe ~]# systemctl start dhcpd.service
[root@pxe ~]# systemctl enable dhcpd.service
[root@pxe ~]# systemctl start vsftpd
[root@pxe ~]# systemctl enable vsftpd

In Case SELinux is enabled, then set the following selinux rule for ftp server

root@pxe ~]# setsebool -P allow_ftpd_full_access 1

Step :9
Open the ports in the OS firewall using following firewall-cmd commands

[root@pxe ~]# firewall-cmd –add-service=ftp –permanent
[root@pxe ~]# firewall-cmd –add-service=dhcp –permanent
[root@pxe ~]# firewall-cmd –add-port=69/tcp –permanent
[root@pxe ~]# firewall-cmd –add-port=69/udp –permanent
[root@pxe ~]# firewall-cmd –add-port=4011/udp –permanent
[root@pxe ~]# firewall-cmd –reload

Completed Now..

source

centos 7