The software described in this documentation is either no longer supported or is in extended support.
Oracle recommends that you upgrade to a current supported release.
A boot-loader configuration file for BIOS-based PXE clients uses pxelinux configuration settings, for example:
default linux prompt 0 timeout 1 label linux kernel /images/ol6-x86_64:1:SpacewalkDefaultOrganization/vmlinuz ipappend 2 append initrd=/images/ol6-x86_64:1:SpacewalkDefaultOrganization/initrd.img \ ksdevice=bootif lang=en_US kssendmac text \ ks=http://192.168.1.3/cblr/svc/op/ks/system/svr1.mydom.com
Do not use the \
line-continuation character.
This character is used in the example to denote that the line
has been broken for printing. The append
directive and all of its arguments must be on the same line.
To allow the boot:
prompt to be displayed,
change the value of prompt
to 1. To display
the prompt, press Shift
or
Alt
at the console.
The default
directive identifies the default
boot entry by its label
value,
ol6u6
.
Pxelinux boots the client using the default boot entry after
timeout
/10 seconds.
The kernel
directive defines the name of the
kernel executable and the append
directive
defines any parameters that should be appended when loading the
kernel, such as the name of the ram-disk image and the location
of the Kickstart file.
The ipappend 2
directive specifies that the
Installer should use the same network interface as the system
used to boot.
For pxelinux, the kernel and ram-disk image file paths are
relative to /var/lib/tftpboot
. The default
boot loader configuration file for pxelinux is
/var/lib/tftpboot/pxelinux.cfg/default
A boot-loader configuration file for UEFI-based PXE clients uses GRUB configuration settings, for example:
default=0 hiddenmenu timeout=0 title ol6u6-x86_64-server:1:SpacewalkDefaultOrganization root (nd) kernel /images/ol6-x86_64:1:SpacewalkDefaultOrganization/vmlinuz \ ksdevice=bootif lang=en_US kssendmac text \ ks=http://192.168.1.3/cblr/svc/op/ks/system/svr1.mydom.com initrd /images/ol6-x86_64:1:SpacewalkDefaultOrganization/initrd.img
Do not use the \
line-continuation character.
This character is used in the example to denote that the line
has been broken for printing. The kernel
directive and all of its arguments must be on the same line.
The timeout=0
and
hiddenmenu
directives cause the default
kernel to boot immediately without allowing you to press a key
to display a menu or modify the configuration of a boot entry.
The default kernel is defined as the first entry
(0
), which is the only entry listed in this
file.
The root
directive defines that the kernel
and initial ram-disk image files are available on the network
device (nd)
, indicating that the files are
available using TFTP.
The kernel
directive defines the name of the
kernel executable and any parameters that should be appended
when loading the kernel, such as the location of the
installation packages, and how to access these packages. The
initrd
directive specifies the initial
ram-disk image file.
For GRUB, the kernel and ram-disk image file paths are relative
to /var/lib/tftpboot/grub
. The default boot
loader configuration file for GRUB is
/var/lib/tftpboot/grub/efidefault
To support different types of client, a configuration file can be named for:
A client's UUID (for example,
a8943708-c6f6-51b9-611e-74e6ac80b93d
)A client's MAC address prefixed by
01-
, which represents the ARP hardware type for Ethernet, and using dashes to separate each byte value instead of colons (for example,01-80-00-27-c6-a1-16
)A client's IP address expressed in hexadecimal without any leading 0x (for example,
C0A801FD
represents the IP address 192.168.1.253)
Cobbler writes client boot configuration files to both
/var/lib/tftpboot/grub
and
/var/lib/tftpboot/pxelinux.cfg
to handle both
UEFI or BIOS-based PXE clients.
The boot loader looks for a configuration file in the following order until it finds a matching file name:
(for example,UUID
a8943708-c6f6-51b9-611e-74e6ac80b93d
)01-
(for example,MAC_address
01-80-00-27-c6-a1-16
)Full 32 bits of the IP address (for example,
C0A801FD
)Most significant 28 bits of the IP address (for example,
C0A801F
)Most significant 24 bits of the IP address (for example,
C0A801
)Most significant 20 bits of the IP address (for example,
C0A80
)Most significant 16 bits of the IP address (for example,
C0A8
)Most significant 12 bits of the IP address (for example,
C0A
)Most significant 8 bits of the IP address (for example,
C0
)Most significant 4 bits of the IP address (for example,
C
)default
(BIOS) orefidefault
(EFI)
For more information about GRUB, enter the info grub command to access the GRUB manual.
For more information about pxelinux, see http://www.syslinux.org/wiki/index.php/PXELINUX.