Archlinux instalation via chroot from other Linux.

I want to leave it here, in order to simplify my life if I decide to install Arch next time.

Initial assumption

Desired partition for Arch linux is /dev/mapper/vg-arch. 

Preparation

	mount -t iso9660 -o loop arch.iso /mnt/archiso
	cp -a /mnt/archiso ~/customiso
	cd some partition with enogth free space on it
	unsquashfs -d /mnt/archiso/arch/x86_64/squashfs-root root-image.fs.sfs
	mkdir arch
	mount -o loop squashfs-root/root-image.fs arch
	mount -t proc none arch/proc
	mount -t sysfs none arch/sys
	mount -o bind /dev arch/de v
	mount -o bind /dev/pts arch/dev/pts
	cp -L /etc/resolv.conf arch/etc

view raw arch_install_step_1 hosted with ❤ by GitHub

Now we ready to chroot:

chroot arch bash

view raw chroot_to_arch_1 hosted with ❤ by GitHub

  

Installation process in chroot 

	mount /dev/mapper/vg-arch /mnt
	pacman-key --init
	pacman-key --populate archlinux
	pacstrap /mnt base base-devel

view raw chroot_install.sh hosted with ❤ by GitHub

Since my root is on lvm partition I need to do additional work:

	# Add lvm2 to HOOKS in file /etc/mkinitcpio.conf :
	HOOKS="... lvm2 ..."
	mkinitcpio -p linux

view raw arch_lvm hosted with ❤ by GitHub

 

Add arch kernel to grub2:

	vim /etc/grub.d/40_custom
	menuentry 'Arch-Linux' --class gnu-linux --class gnu --class os {
	insmod part_msdos
	insmod ext2
	set root='(hd0,msdos5)'
	search --no-floppy --fs-uuid --set=root uuid
	linux /boot/vmlinuz-linux root=/dev/mapper/vg-arch ro
	initrd /boot/initramfs-linux.img
	}
	update-grub

view raw edit_grub_conf hosted with ❤ by GitHub

When I ran grub update my ubuntu instalation also found installed arch and created entry for it in grub-config. But later I was able to load from entry created by me, but not from entry created by ubuntu.

So, we can now chroot in newly installed Archlinux. I was able use pacman normally only after I've disabled CheckSpace option in /etc/pacman.conf

 

Setup network:

	# I do not like new naming convention for interfaces
	# So next line allow to use old one :)
	ln -s /dev/null /etc/udev/rules.d/80-net-name-slot.rules
	pacman -S ifplugd
	cd /etc/network.d
	ln -s examples/ethernet-dhcp
	systemctl enable net-auto-wired.service

view raw network_setup.sh hosted with ❤ by GitHub

Then I've configured system.