![]() ![]() 1.1 Step 1: Install TFTP and TFTP server.PXELINUX has many, many options, and you can consult its documentation at for more. This configuration is obviously very simple. You may well want to host it somewhere on your infrastructure and change the URL to match. Create /srv/tftp/pxelinux.cfg/default containing:ĪPPEND root=/dev/ram0 ramdisk_size=1500000 ip=dhcp url=Īs you can see, this downloads the ISO from Ubuntu’s servers.Make sure to have installed package syslinux-common and then:Ĭp /usr/lib/syslinux/modules/bios/ldlinux.c32 /srv/tftp/.Download pxelinux.0 and put it into place:.Set menu_color_highlight=black/light-gray Create /srv/tftp/grub/grub.cfg that contains:.usr/share/grub/unicode.pf2 -O > /srv/tftp/unicode.pf2 GRUB also needs a font to be available over TFTP:ĭpkg-deb -fsys-tarfile grub-common*deb | tar x.Copy the signed GRUB binary into place:ĭpkg-deb -fsys-tarfile grub-efi-amd64-signed*deb | tar x.usr/lib/shim/shim圆4.efi.signed -O > /srv/tftp/boot圆4.efi Copy the signed shim binary into place:ĭpkg-deb -fsys-tarfile shim-signed*deb | tar x.Copy the kernel and initrd from it to where the dnsmasq serves TFTP from:Ĭp /mnt/casper/ /srv/tftp/. ![]() Download the latest live server ISO for the release you want to install:.Ln -s /usr/share/cd-boot-images-amd64 /srv/tftp/boot-amd64 Ideally this would be something like: apt install cd-boot-images-amd64 We need to make this section possible to write sanely Serving the bootloaders and configuration. Restart dnsmasq with: sudo systemctl restart rvice.This assumes several things about your network read man dnsmasq or the default /etc/nf for lots more options. Put something like this in /etc//pxe.conf: interface=,loĭhcp-match=set:efi-x86_64,option:client-arch,7.Install dnsmasq with: sudo apt install dnsmasq.This document will briefly describe how to configure dnsmasq to perform both of these roles. There are several implementations of the DHCP/BOOTP and TFTP protocols available. Most DHCP/BOOTP servers can be configured to serve the right bootloader to a particular machine. The difference between UEFI and legacy modes is that in UEFI mode the bootloader is an EFI executable, signed so that is accepted by Secure Boot, and in legacy mode it is PXELINUX. From this point on the install follows the same path as if the ISO was on a local block device.The RAM Disk downloads the ISO and mounts it as a loop device.The RAM Disk looks at the kernel command line to learn how to configure the network and where to download the server ISO from.The bootloader downloads configuration, also over TFTP, telling it where to download the kernel, RAM Disk and kernel command line to use.The machine’s firmware downloads the bootloader over TFTP and executes it.The DHCP/BOOTP server tells the machine its network configuration and where to get the bootloader.The to-be-installed machine boots, and is directed to network boot.The process for network booting the live server installer is similar for both modes and goes like this: The precise details depend on the system firmware, but both modes usually support the “Preboot eXecution Environment” (PXE) specification, which allows the provisioning of a bootloader over the network. Multi-node configuration with Docker-Composeĭistributed Replicated Block Device (DRBD)Īmd64 systems boot in either UEFI or legacy (“BIOS”) mode (many systems can be configured to boot in either mode). ![]()
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