113 lines
3.7 KiB
Plaintext
113 lines
3.7 KiB
Plaintext
Provisioning Server ideas
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- bootup kernel on target host via TFTP/PXE
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- start our code that
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- enables networking (dhcp)
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- enables sshd
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Requires:
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- Program that creates our blob that needs to be started
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- for Linux: initrd
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- Including ssh keys -> known!
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- startup sshd
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Setup for installation server:
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- have dhcpd available
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- install tftpd server
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- configure dhcp to tell clients to boot from tftp server
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- have a kernel
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Ideas on how to create "blob"
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- Use tools from system?
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-> requires same arch on destination!
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- Use debian|...| base?
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-> works with cuni!
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tftp via cuni:
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debian pxelinux.0 pxelinux.cfg
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[19:44] kr:tftp% ln -s /usr/lib/syslinux/
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How to create the initrd?
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Base from ...
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arch?
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debian?
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- needs many hardware support / in kernel?
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- fit to kernel?
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Based on Debian
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[21:33] kr:tftp% sudo debootstrap --arch=i386 squeeze debian-squeeze
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sudo chroot debian-squeeze /bin/bash
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apt-get install openssh-server
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Based on Archlinux
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Edit / create pacman.conf
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Server = ftp://mirrors.kernel.org/archlinux/$repo/os/i686
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[21:40] kr:~% grep -v ^# pacman.conf | grep -v '^$'
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[options]
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HoldPkg = pacman glibc
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SyncFirst = pacman
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Architecture = auto
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[core]
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Include = Server = ftp://mirrors.kernel.org/archlinux/$repo/os/i686
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[extra]
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Include = Server = ftp://mirrors.kernel.org/archlinux/$repo/os/i686
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[community]
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Include = Server = ftp://mirrors.kernel.org/archlinux/$repo/os/i686
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[archlinuxfr]
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Server = http://repo.archlinux.fr/$arch
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[21:40] kr:tftp% sudo mkarchroot -C ~/pacman.conf archlinuxroot
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[21:42] kr:tftp% sudo mkarchroot -C ~/pacman.conf archlinuxroot base
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Initramfs general:
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- need /init
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Test in Debian:
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root@kr:/# ln -s /sbin/init init
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Create initramfs:
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[22:47] kr:debian-squeeze% sudo find . -print0 | sudo cpio --null -ov --format=newc | gzip -9 > ../pre-os/initrd.gz
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Gentoo: http://en.gentoo-wiki.com/wiki/Initramfs
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It is possible to specify multiple initramfs to be extracted during boot. This can be useful if you want to create a generic initramfs (for example one that does mdadm) and then add modifications in separate files (for example a custom /etc/mdadm.conf for every machine).
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http://syslinux.zytor.com/wiki/index.php/SYSLINUX#INITRD_initrd_file
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It supports multiple filenames separated by commas. This is mostly useful for initramfs, which can be composed of multiple separate cpio or cpio.gz archives. Note: all files except the last one are zero-padded to a 4K page boundary. This should not affect initramfs.
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Multiple initrds, #1:
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LABEL preos
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MENU LABEL Pre OS (Debian Squeeze)
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KERNEL debian-squeeze/boot/vmlinuz-2.6.32-5-686
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INITRD debian-squeeze/boot/initrd.img-2.6.32-5-686,pre-os/initrd.gz
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Debug in rootfs:
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root@kr:/# passwd
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Enter new UNIX password:
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Retype new UNIX password:
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passwd: password updated successfully
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test
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Multiple nics in Debian...
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