opsi Version 3.3.1 - opsi Download - uib

5. Netboot products: Automated OS installation and more
Based on the information the 'pxelinux.0' got from the 'named pipe', the actual
bootimage is loaded from the opsi depot server via tftp. The bootimage is based on a
linux kernel (/tftpboot/linux/install) within an appropriate initrd file system (/tftpboot/linux/
miniroot.gz) and has a size of approximately 40MB.
5.1.4. Boot from CD
Similar to the tftp boot via PXE-bootprom, the installation boot image can be booted
from the opsi bootcd.
This might be recommended under the following conditions:
• the client has no PXE bootprom;
• there is no dhcp;
• there is a dhcp but it isn't allowed to configure any client data and the hardware
addresses of the clients are unknown;
• there is a dhcp but it isn't configured for this demand.
According to different situations, several information has to be provided for the CD boot
image by interactive input. The most simple case is to provide no further information.
Eventually the clients hostname can be passed by hn=. Using the option
ASK_CONF=1 several parameters can be queried. Pressing F1 at the CD prompt
shows the syntax.
5.1.5. The linux bootimage prepares for reinstallation
The bootimage again performs a dhcp request and configures the network interface
according to the perceived information. Afterwards the configuration data for the client
will be loaded via opsi-webservice.
The configuration data provides the information about the server in charge, the file
share and the name of the installation script.
79