The Network Booting Service (provided by system-config-netboot) is no longer available in Red Hat Enterprise Linux 6. Deploying diskless systems is now possible in this release without the use of system-config-netboot.
To set up a basic remote diskless system booted over PXE, you need the following packages:
tftp-server
xinetd
dhcp
syslinux
dracut-network
Remote diskless system booting requires both a tftp service (provided by tftp-server) and a DHCP service (provided by dhcp). The tftp service is used to retrieve kernel image and initrd over the network via the PXE loader. Both tftp and DHCP services must be provided by the same host machine.
The following sections outline the necessary procedures for deploying remote diskless systems in a network environment.
19.1. Configuring a tftp Service for Diskless Clients
The tftp service is disabled by default. To enable it and allow PXE booting via the network, set the Disabled option in /etc/xinetd.d/tftp to no. To configure tftp, perform the following steps:
The tftp root directory (chroot) is located in /var/lib/tftpboot. Copy /usr/share/syslinux/pxelinux.0 to /var/lib/tftpboot/, as in:
Create a pxelinux.cfg directory inside the tftp root directory:
mkdir -p /var/lib/tftpboot/pxelinux.cfg/
You will also need to configure firewall rules properly to allow tftp traffic; as tftp supports TCP wrappers, you can configure host access to tftp via /etc/hosts.allow. For more information on configuring TCP wrappers and the /etc/hosts.allow configuration file, refer to the Red Hat Enterprise Linux 6 Security Guide; man hosts_access also provides information about /etc/hosts.allow.
