Unattended installation system
PXE(Preboot eXecute Environment) is a technology developed by Intel company. It can let the computer boot the operating system through the network (provided that the network card installed on the computer supports PXE Technology). It is mainly used to guide the client host to install the Linux operating system in the UAV on duty installation system
| Host name | operating system | IP address |
|---|---|---|
| Unattended system | RHEL7 | 192.168.56.25 |
| Client host | No operating system installed | - |
Deploy DHCP server
[root@mail ~]# yum install dhcp -y
[root@mail ~]# vim /etc/dhcp/dhcpd.conf
allow booting;
allow bootp;
ddns-update-style interim;
ignore client-updates;
subnet 192.168.56.0 netmask 255.255.255.0 {
option subnet-mask 255.255.255.0;
option domain-name-servers 192.168.56.25;
range dynamic-bootp 192.168.56.100 192.168.56.200;
default-lease-time 21600;
max-lease-time 43200;
next-server 192.168.56.25;
filename "pxelinux.0";
}
Configure TFTP server
[root@mail ~]# yum install tftp-server -y
[root@mail ~]# 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
disable = no //yesChange tono
per_source = 11
cps = 100 2
flags = IPv4
}
[root@mail ~]# firewall-cmd --permanent --add-port=69/udp
success
[root@mail ~]# firewall-cmd --reload
success
Configure syslinux service program
[root@mail ~]# yum install syslinux -y
[root@mail ~]# cd /var/lib/tftpboot/
[root@mail tftpboot]# cp /usr/share/syslinux/
altmbr.bin gptmbr_c.bin isolinux.bin pwd.c32
altmbr_c.bin gptmbr_f.bin isolinux-debug.bin pxechain.com
altmbr_f.bin gpxecmd.c32 kbdmap.c32 pxelinux.0
cat.c32 gpxelinux.0 linux.c32 reboot.c32
chain.c32 gpxelinuxk.0 ls.c32 rosh.c32
cmd.c32 hdt.c32 lua.c32 sanboot.c32
config.c32 host.c32 mboot.c32 sdi.c32
cpuid.c32 ifcpu64.c32 mbr.bin sysdump.c32
cpuidtest.c32 ifcpu.c32 mbr_c.bin syslinux64.exe
diag/ ifplop.c32 mbr_f.bin syslinux.com
disk.c32 int18.com memdisk syslinux.exe
dmitest.c32 isohdpfx.bin memdump.com ver.com
dosutil/ isohdpfx_c.bin meminfo.c32 vesainfo.c32
elf.c32 isohdpfx_f.bin menu.c32 vesamenu.c32
ethersel.c32 isohdppx.bin pcitest.c32 vpdtest.c32
gfxboot.c32 isohdppx_c.bin pmload.c32 whichsys.c32
gptmbr.bin isohdppx_f.bin poweroff.com zzjson.c32
[root@mail tftpboot]# cp /usr/share/syslinux/pxelinux.0 .
[root@mail tftpboot]# cp /mnt/images/pxeboot/{vmlinuz,initrd.img} .
[root@mail tftpboot]# cp /mnt/isolinux/{vesamenu.c32,boot.msg} .
[root@mail tftpboot]# ls
boot.msg initrd.img pxelinux.0 vesamenu.c32 vmlinuz
[root@mail tftpboot]# mkdir pxelinux.cfg
[root@mail tftpboot]# cp /mnt/isolinux/isolinux.cfg pxelinux.cfg/default
[root@mail tftpboot]# vim pxelinux.cfg/default
1 default linux
64 append initrd=initrd.img inst.stage2=ftp://192.168.56.25 ks=ftp://192.168.56.25/pub/ks.cfg quiet
Configure vsftpd service program
[root@mail tftpboot]# yum install vsftpd -y
[root@mail tftpboot]# systemctl restart vsftpd
[root@mail tftpboot]# systemctl enable vsftpd
ln -s '/usr/lib/systemd/system/vsftpd.service' '/etc/systemd/system/multi-user.target.wants/vsftpd.service'
[root@mail pub]# firewall-cmd --permanent --add-service=ftp
success
[root@mail pub]# firewall-cmd --reload
success
[root@mail pub]# setsebool -P ftpd_connect_all_unreserved=on
Create KickStart answer file
If you think that the default response file parameters of the system are less and cannot meet the requirements of the production environment, you can install the system config Kickstart software package through the Yum warehouse. This is a graphical tool for generating Kickstart response files, which can generate self defined response files according to your own needs
[root@mail ~]# cp anaconda-ks.cfg /var/ftp/pub/ks.cfg
[root@mail pub]# chmod 755 /var/ftp/pub/ks.cfg
6 url --url=ftp://192.168.56.25
21 timezone Asia/Shanghai --isUtc
29 clearpart --all --initlabel