pxe使用GRUB作为引导的方法

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安装上面这些软件包

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dnf install dhcp-server tftp-server grub2-efi-x64-modules grub2-tools-extra grub2-pc-modules -y

配置dhcp在/etc/dhcp/dhcpd.conf，增加下面配置 

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option pxe-system-type code 93 = unsigned integer 16;
option rfc3442-classless-static-routes code 121 = array of integer 8;
option ms-classless-static-routes code 249 = array of integer 8;

option space pxelinux;
option pxelinux.magic code 208 = string;
option pxelinux.configfile code 209 = text;
option pxelinux.pathprefix code 210 = text;
option pxelinux.reboottime code 211 = unsigned integer 32;
option architecture-type   code 93 = unsigned integer 16;
option pxelinux.mtftp-ip    code 1 = ip-address;
option pxelinux.mtftp-cport code 2 = unsigned integer 16;
option pxelinux.mtftp-sport code 3 = unsigned integer 16;
option pxelinux.mtftp-tmout code 4 = unsigned integer 8;
option pxelinux.mtftp-delay code 5 = unsigned integer 8;

在subnet { } 里面添加这些内容

subnet 0.0.0.0 mask 255.255.255.0 {

xxxxxx

}

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class "pxeclients" {
        match if substring (option vendor-class-identifier, 0, 9) = "PXEClient";
        # x86_64 EFI
        if option pxe-system-type = 00:07 {
                filename "boot/grub2/x86_64-efi/core.efi";
        } else if option pxe-system-type = 00:08 {
                filename "boot/grub2/x86_64-efi/core.efi";
        } else if option pxe-system-type = 00:09 {
                filename "boot/grub2/x86_64-efi/core.efi";
        } else {
                # BIOS boot only
                filename "boot/grub2/i386-pc/core.0";
        }
}

合并配置大概就是这样的

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ddns-update-style interim;

allow booting;
allow bootp;
authoritative;
log-facility local6;

ignore client-updates;
set vendorclass = option vendor-class-identifier;

## Allowing EFI Clients
option pxe-system-type code 93 = unsigned integer 16;
option rfc3442-classless-static-routes code 121 = array of integer 8;
option ms-classless-static-routes code 249 = array of integer 8;

option space pxelinux;
option pxelinux.magic code 208 = string;
option pxelinux.configfile code 209 = text;
option pxelinux.pathprefix code 210 = text;
option pxelinux.reboottime code 211 = unsigned integer 32;
option architecture-type code 93 = unsigned integer 16;

option pxelinux.mtftp-ip    code 1 = ip-address;
option pxelinux.mtftp-cport code 2 = unsigned integer 16;
option pxelinux.mtftp-sport code 3 = unsigned integer 16;
option pxelinux.mtftp-tmout code 4 = unsigned integer 8;
option pxelinux.mtftp-delay code 5 = unsigned integer 8;

subnet 10.100.0.0 netmask 255.255.255.0 {
        interface               eth0;
     #   option routers          10.100.0.1;
        option domain-name-servers      10.100.0.1, 10.100.0.231;
     #   option domain-name              "angelsofclockwork.net";
        option subnet-mask              255.255.255.0;
        range           10.100.0.110 10.100.0.199;
        ## EFI Client Catch
        class "pxeclients" {
                match if substring (option vendor-class-identifier, 0, 9) = "PXEClient";
                if option pxe-system-type = 00:07 {
                        filename "grub/x86_64-efi/core.efi";
                } else if option pxe-system-type = 00:08 {
                        filename "grub/x86_64-efi/core.efi";
                } else if option pxe-system-type = 00:09 {
                        filename "grub/x86_64-efi/core.efi";
             #   } else if option pxe-system-type = 00:0a {
             #           filename "boot/grub2/armv7a-efi/core.efi";
             #   } else if option pxe-system-type = 00:0b {
             #           filename "boot/grub2/aarch64-efi/core.efi";
                } else {
                        filename "grub/i386-pc/core.0";
                }
        }
        default-lease-time      21600;
        max-lease-time  43200;
        next-server     10.100.0.1;
}
# Ensure that the dhcpd service is rest

在tftp目录生成grub引导文件

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grub2-mknetdir  --net-directory=/var/lib/tftpboot --subdir=grub

生成grub.cfg配置文件

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nano /var/lib/tftpboot/grub/grub.cfg
set default=0
set timeout=60
menuentry 'EFI Firmware System Setup' $menuentry_id_option 'uefi-firmware' {
  fwsetup
}

menuentry 'Reboot' {
  reboot
}

menuentry 'Shutdown' {
  halt
}

建立好文件引用关系，将bios和efi配置文件指向一个

mv /var/lib/tftpboot/grub/i386-pc/grub.cfg /var/lib/tftpboot/grub/i386-pc/grub.cfg.bk

mv /var/lib/tftpboot/grub/x86_64-efi/grub.cfg /var/lib/tftpboot/grub/x86_64-efi/grub.cfg.bk

ln -s /var/lib/tftpboot/grub/grub.cfg /var/lib/tftpboot/grub/i386-pc/grub.cfg

ln -s /var/lib/tftpboot/grub/grub.cfg /var/lib/tftpboot/grub/x86_64-efi/grub.cfg

启动服务并测试

systemctl start dhcpd tftp-server

这篇文章参考了

https://linuxguideandhints.com/el/pxeboot.html

https://wiki.ubuntu.com/UEFI/SecureBoot/PXE-IPv6

pxe boot uefi for ubuntu

https://cloud.189.cn/web/share?code=fEZB3qaAvMr2（访问码：zuc6）