pxe自动安装（CentOS7）

1、配置环境

yum install httpd tftp-server dhcp syslinux 
systemctl start httpd tftp

2、准备yum源

把光盘挂载在http可以访问的位置

mkdir /var/www/html/centos/7/os/x86_64 -pv
mount /dev/sr0 /var/www/html/centos/7/os/x86_64

3、配置ks文件

yum -y install system-config-kickstart
yum -y install xorg-x11-xauth（如果xmanager打不开）
sed -i 's/base/development/' /etc/yum.repos.d/CentOS-Base.repo（centos7需把yum源名字修改一下，如果不行使用本地yum源）
system-config-kickstart

图形界面配置如下：在这里插入图片描述

最后保存为ks7_mini.cfg文件（直接使用下面文本进行修改也可以）：

#platform=x86, AMD64, or Intel EM64T
#version=DEVEL
# Install OS instead of upgrade
install
# Keyboard layouts
keyboard 'us'
# Root password
rootpw --iscrypted $1$9teneOiS$.Dt6KoJ4Rt9R90YpSRcFn0
# System language
lang en_US
# System authorization information
auth  --useshadow  --passalgo=sha512
# Use text mode install
text
firstboot --disable
# SELinux configuration
selinux --disabled

# Firewall configuration
firewall --disabled
# Network information
network  --bootproto=dhcp --device=eth0
# Reboot after installation
reboot
# System timezone
timezone Asia/Shanghai
# Use network installation
url --url="http://192.168.175.10/centos/7/os/x86_64/"
# System bootloader configuration
bootloader --append="net.ifnames=0" --location=mbr
# Clear the Master Boot Record
zerombr
# Partition clearing information
clearpart --all --initlabel
# Disk partitioning information
part /boot --fstype="xfs" --size=200
part swap --fstype="swap" --size=2000
part / --fstype="xfs" --grow --size=1

%packages
@^minimal
%end

%post
mkdir /root/.ssh
chmod 700 /root/.ssh
cat > /root/.ssh/authorized_keys <<EOF
ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC9fZkSZq0Id35QE5EsWI3Lg/ET02mxRRIV8dwZ4IN8hdbeH/nfYeom9uQsd4iW93MUHiaHRA5gKH23ds7IrpP4R8Oq2vxmqT6dvrDcL1Jb2gB4cgjY05+ygBGUhJjgyptV2l9dddIeuG8i1L7WSAX/mUOrk1nXRuJI4nwq4U/2P0xsl2PsFpcS+dIxqaS6P+8x6ZglUNJoxIgU3JkF1Npgn0teAirmPjfLdIuofnuCwT4Mept1nIVLmZK6OuRSuf+eOtIv3a5YNDfoS/NvcoSwrU2DBqR2cI4ejHYcHP/2uxXVw1kC70N1wLTjMydaUcNzfjccAw5BsAs889Q1HWiv
EOF
chmod 600 /root/.ssh/authorized_keys
%end

保存完检查语法

ksvalidator ~/ks7_mini.cfg

创建http可以访问的路径

mkdir  /var/www/html/ksdir/
ls /var/www/html/ksdir/
ks7_mini.cfg

可以使用光盘启动进行测试ks文件是否已成功，进入安装界面按ESC

boot: linux ks=http://192.168.175.10/ksdir/ks7_mini.cfg

4、配置dhcp服务

复制配置文件修改相关行的内容

cp /usr/share/doc/dhcp-4.2.5/dhcpd.conf.example /etc/dhcp/dhcpd.conf

vim /etc/dhcp/dhcpd.conf
########################################################
option domain-name "zyx.com";
option domain-name-servers 114.114.114.114, 180.76.76.76;

default-lease-time 86400;
max-lease-time 864000;

subnet 192.168.175.0 netmask 255.255.255.0 {
    range 192.168.175.50 192.168.175.100;
    option routers 192.168.175.2;
    next-server 192.168.175.10;
    filename "pxelinux.0";
}
########################################################
systemctl start dhcpd

5、配置tftp文件

cp /usr/share/syslinux/{pxelinux.0,menu.c32}  /var/lib/tftpboot/

cp /var/www/html/centos/7/os/x86_64/isolinux/{vmlinuz,initrd.img} /var/lib/tftpboot/

mkdir /var/lib/tftpboot/pxelinux.cfg/

cp /var/www/html/centos/7/os/x86_64/isolinux/isolinux.cfg /var/lib/tftpboot/pxelinux.cfg/default

vim /var/lib/tftpboot/pxelinux.cfg/default
############################################
default menu.c32
timeout 600
menu title CentOS Auto Install

label linux
  menu label Install CentOS ^Mini 7
  kernel vmlinuz
  append initrd=initrd.img ks=http://192.168.175.10/ksdir/ks7_mini.cfg

label local
  menu label Boot from ^local drive
  menu default
  localboot 0xffff
########################################################
  
tree /var/lib/tftpboot/
├── initrd.img
├── menu.c32
├── pxelinux.0
├── pxelinux.cfg
│   └── default
└── vmlinuz

1 directory, 5 files

6、测式机网卡启动

测试机内存至少要1.5G不然自动安装会报错。

来源：CSDN

作者：从小打酱油

链接：https://blog.csdn.net/apple2417/article/details/104296993

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