Setting Up A Configuration File Server - Dell DX6000 Getting Started Manual

File name
tftpboot/profiles/castor/fsimage
tftpboot/profiles/castor/kernel
tftpboot/pxelinux.cfg/default
For additional information regarding the use of the PXELINUX boot loader, refer to the included
documentation and ZIP file in the samples/Network-Boot directory on the DX Storage
distribution media.
2.4.2.4. DHCP and Boot Server Redundancy
To eliminate a single point of failure if your DHCP server goes offline, you must configure both
primary and secondary DHCP servers. Details on the necessary steps to set up the ISC DHCP
daemon for redundancy can be found in the following article:
failover/
To provide redundancy at the network booting layer, your primary and secondary DHCP servers can
be used as TFTP servers as well. In their setups, set the next-server parameter specify to their
own IP address. This way, whichever DHCP server answers the DHCP query will also be the server
that handles the PXE boot. To prevent any network interruptions, the TFTP boot server(s) should
be on the same broadcast domain (that is, VLAN) as the DX Storage nodes, or you should enable a
DHCP relay server on the VLAN.

2.5. Setting Up a Configuration File Server

Note
If you boot from a CSN, the tasks discussed in this section are not necessary or
recommended. Your system is already set up to PXE boot from the CSN.
DX Storage supports centralizing the node configuration files on an HTTP or FTP server. This
method of booting can be used with network booting or with standard USB flash drive booting.
A centralized configuration server simplifies the administration of large DX Storage clusters by
allowing configuration file updates and by providing a method to group configurations of similar
nodes.
To use a configuration file server, set the value of the castor_cfg kernel configuration parameter
to a URL that specifies the configuration list file. For details, see one of the following examples:
• PXE boot example.
Following is an example PXELINUX configuration file from the tftpboot/pxelinux.cfg
directory on the TFTP boot server.
default profiles/castor/kernel
append initrd=profiles/castor/fsimage
ramdisk_size=128000 root=/dev/ram0
castor_cfg=http://172.16.1.200/castor/cfg-list.txt
Note
The append command must be entered on a single line. It is shown here on multiple
lines because of space limitations.
Copyright © 2010 Caringo, Inc.
All rights reserved
Description
DX Storage software
DX Storage operating system kernel
PXELINUX configuration file
http://www.madboa.com/geek/dhcp-
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Version 5.0
December 2010