PXE_ KS unattended system

Unattended installation PXE+KS

Unattended installation is a program about Automation （ In short, configure the server , All clients in the LAN can automatically obtain from the server without choosing to install the system IP Address , Automatically install the system according to the configuration of the server ）

structure

install

 install dhcp
yum -y install dhcp
cp /usr/share/doc/dhcp-4.2.5/dhcpd.conf.example  /etc/dhcp/dhcpd.conf
mv： Is it covered? "/etc/dhcp/dhcpd.conf"？ y

 Modify the configuration , Add a new one subnet
vim /etc/dhcp/dhcpd.conf 
subnet 192.168.5.0 netmask 255.255.255.0 {
  range 192.168.5.160 192.168.5.170;
  next-server 192.168.5.7;                          # The address of the next server , That is to say tftp Of IP Address 
  filename "pxelinux.0";                            # Boot file name , Indicates the boot file name 
}

 Restart the service 
systemctl restart dhcpd

 install xinetd, Boot up tftpd-server The server , You need to use configuration xinetd The server 
yum -y install xinetd
vim /etc/xinetd.d/tftp
disable                 = no                        # Make it effective 

 install tftp-server service 
yum -y install tftp-server

 When installing and using sysLinux, Provide pxelinux.0 file , If so, don't install 
yum -y install syslinux
cp /usr/share/syslinux/pxelinux.0  /var/lib/tftpboot/         # Copy the bootstrap file of the remote installation 

 Copy the boot files and other files necessary for the new system 
mkdir /mount
vim /etc/fstab                                      # Mount the CD first , Mount to mount
/dev/sr0  /mount  iso9660  defaults  0 0            # Mount format   
mount -a                                            # Reload 
mount: /dev/sr0  Write protect , Will mount... As read-only 
cp /mount/images/pxeboot/vmlinuz /var/lib/tftpboot/
cp /mount/images/pxeboot/initrd.img /var/lib/tftpboot/
cp /mount/isolinux/vesamenu.c32  /var/lib/tftpboot/
cp /mount/isolinux/boot.*  /var/lib/tftpboot/


 Copy a configuration file for the bootstrap 
 stay /var/lib/tftpboot/ Create a new directory , Directory name pxelinux.cfg, Copy /mount/isolinux/isolinux.cfg File to pxelinux.cfg The directory is named default
mkdir /var/lib/tftpboot/pxelinux.cfg
cp /mount/isolinux/isolinux.cfg /var/lib/tftpboot/pxelinux.cfg/default
 Edit profile ： Tell access to tftp The complete system of the client of the service IP Address and path , also ks（ System installation procedure record file ） Of documents IP Address and path 
vim /var/lib/tftpboot/pxelinux.cfg/default
default linux                                                # Manual selection during startup can be omitted install centos7
append initrd=initrd.img inst.stage2=ftp://192.168.5.7/centos ks=ftp://192.168.5.7/centos/ks.cfg quiet


 install ftp, Copy the complete operating system 
yum -y install vsftpd
mkdir /var/ftp/centos
 Copy the complete operating system to tftp The path specified by the configuration file , front tftp The configuration file is written as ftp://192.168.5.7/centos, So it will automatically address to ftp Under the centos
cp -r /mount/* /var/ftp/centos/                      #-r  duplicate catalog 

 The new system is generated by the replication server host ks file , Automatically perform the same operation as the server host during installation 
cp /root/anaconda-ks.cfg  /var/ftp/centos/ks.cfg
chmod +r /var/ftp/centos/ks.cfg                      # Add executable rights 

 edit ks file 
vim /var/ftp/centos/ks.cfg
url --url="ftp://192.168.5.7/centos"                 # Tell the client to pass ftp Shared directory centos install 
reboot                                               # restart 
eula --agreed                                        # Agree to the agreement 

 Restart the service , Turn off firewall , Turn off use syslinux
systemctl restart tftp
systemctl restart xinetd
systemctl restart vsftpd
systemctl restart dhcpd
systemctl stop firewalld
setenforce 0

 verification 
 New virtual machine 
 configure hardware 
 Memory 2GB above 
 Do not select an operating system 
 Turn on the virtual machine 

shell Script

vim pxe_ks.sh

About improving ： Take various parameters such as IP Addresses and different paths of different devices can be made into variables

#!/bin/bash

# Prompt information 
echo "！！！ Please confirm that the virtual machine is CD/DVD Whether to set connected ？"
echo "！！！ Please make sure the PXE Whether the parameters of the script have been modified ？"
echo "！！！ Please confirm whether the virtual machine image path is set ？"
echo "！！！ Please make sure the yum Whether sleep needs rm -f /var/run/yum.pid？"
echo "！！！ Not set to be available in 5 In seconds ctrl+c end ！！"
sleep 5    # Sleep five seconds 

# Determine whether to mount 
grep mount_cdrom /etc/fstab  > /dev/null 2>&1       # All output is redirected to null
if [  $? -eq 0 ] ; then
    echo " CD reload .."
    mount -a
    sleep 0
    echo " The CD has been mounted successfully ！！"
  else
    echo " Mounting CD .."
    echo "/dev/sr0 /mount_cdrom iso9660 defaults 0 0"  >> /etc/fstab
    echo " Creating a new mount directory .."
    sleep 2
    mkdir /mount_cdrom
    echo " CD reload .."
    sleep 2
    mount -a
    echo " CD reload successful ！！"
fi

# install dhcp
echo " Ready to install dhcp.."
ls /usr/share/doc/dhcp*/dhcpd.conf.example > /dev/null 2>&1
if [ $? -eq 0 ] ; then
    echo "DHCP already installed ！！"
  else
    echo " Installing DHCP, Please later .."
    rm -f /var/run/yum.pid
    yum -y install dhcp 
fi

# To configure dhcp
echo " Configuring DHCP The configuration file .."
sleep 2
\cp /usr/share/doc/dhcp*/dhcpd.conf.example  /etc/dhcp/dhcpd.conf    # The backslash can not prompt whether to overwrite the file 
sed -i '36 a\subnet 192.168.5.0 netmask 255.255.255.0 {\n range 192.168.5.160 192.168.5.170;\n next-server 192.168.5.7;\n filename "pxelinux.0";\n}\n' /etc/dhcp/dhcpd.conf
echo " Restart DHCP.."
systemctl restart dhcpd

# install xinetd and tftp-server
rpm -qa | grep xinetd
if [ $? -eq 0 ] ; then
    echo "xinetd Is already installed ！！"
  else
    echo "xinetd Installing .."
    yum -y install xinetd 
    echo "xinetd Is already installed ！！"
fi
rpm -qa | grep tftp-server
if [ $? -eq 0 ] ; then
    echo "tftp Is already installed ！！"
  else
    echo "tftp Installing .."
    yum -y install tftp-server 
    echo "tftp Is already installed ！！"
fi

# Replace xinetd Of tftp To configure 
sed -i '14d' /etc/xinetd.d/tftp                                            # Delete 14 That's ok 
sed -i '13 a\ disable = no' /etc/xinetd.d/tftp     # stay 13 Add a new... After the line 14 That's ok 

# The new system provides pxelinux.0 file 
rpm -qa | grep syslinux  > /dev/null 2>&1
if [ $? -eq 0 ] ; then
    echo 'syslinux Is already installed ！！'
  else
    echo ' Installing syslinux..'
    yum -y install syslinux  
    echo 'syslinux Installation successful ！！'
fi
cp /usr/share/syslinux/pxelinux.0  /var/lib/tftpboot/

# Copy the boot files necessary for system installation 
echo ' Copying boot files required for system installation ..'
sleep 2
cp /mount_cdrom/images/pxeboot/vmlinuz /var/lib/tftpboot/
cp /mount_cdrom/images/pxeboot/initrd.img /var/lib/tftpboot/
cp /mount_cdrom/isolinux/vesamenu.c32  /var/lib/tftpboot/
cp /mount_cdrom/isolinux/boot.*  /var/lib/tftpboot/
if [ $? -eq 0 ] ; then
    echo ' Replication success ！！'
fi

# Make a configuration file for the bootstrap 
echo ' Making configuration file for bootstrapper ..'
sleep 2
if [ -e /var/lib/tftpboot/pxelinux.cfg ] ; then
    echo "pxelinux.cfg Already exists , No need to make ！！"
  else
    mkdir /var/lib/tftpboot/pxelinux.cfg
fi
\cp /mount_cdrom/isolinux/isolinux.cfg /var/lib/tftpboot/pxelinux.cfg/default
sed -i '1d' /var/lib/tftpboot/pxelinux.cfg/default 
sed -i '1 i\default linux' /var/lib/tftpboot/pxelinux.cfg/default 
sed -i '64d' /var/lib/tftpboot/pxelinux.cfg/default  
sed -i '63 a\ append initrd=initrd.img inst.stage2=ftp://192.168.5.7/centos ks=ftp://192.168.5.7/centos/ks.cfg quiet' /var/lib/tftpboot/pxelinux.cfg/default
if [ $? -eq 0 ] ; then
    echo ' The bootstrap configuration file is finished ！！'
fi

# install ftp
rpm -qa | grep vsftpd
if [ $? -eq 0 ] ; then
    echo 'vsftpd Is already installed ！！'
  else
    echo ' Installing vsftpd'
    yum -y install vsftpd
    echo 'vsftpd Installation successful ！！'
fi

# Copy the complete operating system to tftp The path specified by the configuration file 
mkdir /var/ftp/centos
echo ' Copying full operating system , Please wait a few minutes ..'
cp -r /mount_cdrom/* /var/ftp/centos/
echo ' The complete operating system was copied successfully ！！'

# Make for the new system ks file 
echo ' Is making ks file ..'
sleep 2
cp /root/anaconda-ks.cfg  /var/ftp/centos/ks.cfg
chmod +r /var/ftp/centos/ks.cfg
sed -i '22d' /var/ftp/centos/ks.cfg
sed -i '21 a\url --url="ftp://192.168.5.7/centos"' /var/ftp/centos/ks.cfg
sed -i '68 a\reboot\neula --agreed' /var/ftp/centos/ks.cfg
echo 'ks The file was created successfully ！！'

# Restart the service , Turn off firewall , Turn off use syslinux
echo ' Restarting service , Turn off firewall '
systemctl restart tftp
systemctl restart xinetd
systemctl restart vsftpd
systemctl restart dhcpd
systemctl stop firewalld
setenforce 0
echo ' Restart service succeeded , Firewall closed successfully ！！'

# end 
yum -y install sl > /dev/null 2>&1          # A small train program 
echo '.......................'
echo '.......................'
echo 'PXE-KS The unattended program of the operating system was successfully deployed ！！'
echo '.......................'
echo '.......................'
sl

echo ‘ Restart service succeeded , Firewall closed successfully ！！’

# end
yum -y install sl > /dev/null 2>&1 # A small train program
echo ‘…’
echo ‘…’
echo ‘PXE-KS The unattended program of the operating system was successfully deployed ！！’
echo ‘…’
echo ‘…’
sl