30.2. 网络引导配置
下一步是将启动安装所必需的文件复制到
tftp 服务器中，这样当客户端需要它们时就可以找到。tftp 服务器和导出安装树的网络服务器通常是同一个。
PXE 引导配置步骤与 BIOS 和 EFI 不同。为 Power 系统服务器提供独立的 yaboot 配置步骤。
注意
Red Hat Satellite has the ability to automate the setup of a PXE server. See the Red Hat Satellite User Guide for more information.
30.2.1. 为 BIOS 配置 PXE 引导
- 如果还没有安装 tftp-server，请运行
yum install tftp-server。 - In the tftp-server config file at
/etc/xinetd.d/tftp, change thedisabledparameter fromyestono. - Configure your DHCP server to use the boot images packaged with SYSLINUX. (If you do not have a DHCP server installed, refer to the DHCP Servers chapter in the Red Hat Enterprise Linux Deployment Guide.)
/etc/dhcp/dhcpd.conf中的示例配置如下：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; subnet 10.0.0.0 netmask 255.255.255.0 { option routers 10.0.0.254; range 10.0.0.2 10.0.0.253; class "pxeclients" { match if substring (option vendor-class-identifier, 0, 9) = "PXEClient"; next-server 10.0.0.1; if option arch = 00:06 { filename "pxelinux/bootia32.efi"; } else if option arch = 00:07 { filename "pxelinux/bootx64.efi"; } else { filename "pxelinux/pxelinux.0"; } } host example-ia32 { hardware ethernet XX:YY:ZZ:11:22:33; fixed-address 10.0.0.2; } } - 现在需要 ISO 映像文件中 SYSLINUX 软件包中的
pxelinux.0文件。要访问该文件，请作为 root 运行以下命令：mount -t iso9660 /path_to_image/name_of_image.iso /mount_point -o loop,rocp -pr /mount_point/Packages/syslinux-version-architecture.rpm /publicly_available_directoryumount /mount_point提取软件包：rpm2cpio syslinux-version-architecture.rpm | cpio -dimv - 在
tftpboot中创建pxelinux目录，并将pxelinux.0复制到该目录中：mkdir /var/lib/tftpboot/pxelinuxcp publicly_available_directory/usr/share/syslinux/pxelinux.0 /var/lib/tftpboot/pxelinux - 在
pxelinux中创建pxelinux.cfg目录：mkdir /var/lib/tftpboot/pxelinux/pxelinux.cfg - Add a config file to this directory. The file should either be named
defaultor named after the IP address, converted into hexadecimal format without delimiters. For example, if your machine's IP address is 10.0.0.1, the filename would be0A000001./var/lib/tftpboot/pxelinux/pxelinux.cfg/default中的示例配置未见类似如下：default vesamenu.c32 prompt 1 timeout 600 display boot.msg label linux menu label ^Install or upgrade an existing system menu default kernel vmlinuz append initrd=initrd.img label vesa menu label Install system with ^basic video driver kernel vmlinuz append initrd=initrd.img xdriver=vesa nomodeset label rescue menu label ^Rescue installed system kernel vmlinuz append initrd=initrd.img rescue label local menu label Boot from ^local drive localboot 0xffff label memtest86 menu label ^Memory test kernel memtest append -
关于如何指定安装源的步骤，请参考 第 7.1.3 节 “其他引导选项”。 - 将 splash 映像复制到
tftp根目录下：cp /boot/grub/splash.xpm.gz /var/lib/tftpboot/pxelinux/splash.xpm.gz - 将引导映像复制到
tftp根目录下：cp /path/to/x86_64/os/images/pxeboot/{vmlinuz,initrd.img} /var/lib/tftpboot/pxelinux/rhel6/ - Boot the client system, and select the network device as your boot device when prompted.
