Install Arch Linux on remote server

install-arch.txt

Protocol that worked to install Arch on a remote server

Situation: host provides CentOS image but not one for Arch.
Default CentOS install includes two hard drives in a RAID 1 setup, mapped as /dev/mapper/vg-root and /dev/mapper/vg-swap

Guides:
https://wiki.archlinux.org/index.php/Remote_installation
https://wiki.archlinux.org/index.php/Install_from_existing_Linux
https://wiki.archlinux.org/index.php/Install_from_SSH
http://ordinatechnic.com/os-specific-guides/arch/archlinux-installing-from-an-existing-linux-installation

(Replace MY_HOSTNAME, MY_IP_ADDRESS, MY_DOMAIN, MY_NAMESERVER1, MY_NAMESERVER2, MY_NETWORK_NAME below with correct values.)

CentOS:
	swapoff /dev/mapper/vg-swap
	fdisk /dev/mapper/vg-swap
	mke2fs -j /dev/mapper/vg-swap
	yum -y install rng-tools
	rngd -r /dev/urandom
	cd /tmp
	curl -O https://mirrors.kernel.org/archlinux/iso/latest/archlinux-bootstrap-2015.09.01-x86_64.tar.gz
	tar xzf archlinux-bootstrap-2015.09.01-x86_64.tar.gz
	cd root.x86_64
	vi etc/pacman.d/mirrorlist
	/bin/cp -f /etc/resolv.conf etc
	mount -t proc /proc proc
	mount --rbind /sys sys
	mount --rbind /dev dev
	chroot /tmp/root.x86_64 /bin/bash

First chroot:
	pacman-key --init
	pacman-key --populate archlinux
	pacman -Syyu
	pacman -S base
	mkdir /mnt/arch
	mount /dev/mapper/vg-swap /mnt/arch
	pacstrap /mnt/arch base
	genfstab -p /mnt/arch/ >> /mnt/arch/etc/fstab 
	arch-chroot /mnt/arch/

Second chroot:
	passwd 
	pacman -S grub
	echo MY_HOSTNAME > /etc/hostname
	ln -sf /usr/share/zoneinfo/America/New_York /etc/localtime
	sed -i 's/#en_US/en_US/' /etc/locale.gen
	locale-gen 
	echo LANG=en_US > /etc/locale.conf
	vi /etc/mkinitcpio.conf
		Add the dm_mod and raid1 modules to the MODULES list
		Add the mdadm_udev and lvm2 hooks to the HOOKS list after udev
		(or mdadm instead of mdadm_udev)
	mkinitcpio -p linux
	sed -i 's/use_lvmetad = 1/use_lvmetad = 0/' /etc/lvm/lvm.conf
	grub-install --target=i386-pc --recheck /dev/sda
	grub-install --target=i386-pc --recheck /dev/sdb
	grub-mkconfig -o /boot/grub/grub.cfg
	pacman -S openssh
	systemctl enable sshd
	vi /etc/ssh/sshd_config
		PermitRootLogin yes # (For now)
	vi /etc/systemd/network/MY_HOSTNAME.network
		[Match]
		Name=MY_NETWORK_NAME

		[Network]
		Address=MY_IP_ADDRESS
		DHCP=ipv4
	vi /etc/resolv.conf
		search MY_DOMAIN
		nameserver MY_NAMESERVER1
		nameserver MY_NAMESERVER2
	systemctl enable systemd-networkd
	mdadm --detail --scan >> /etc/mdadm.conf
	cat /etc/mdadm.conf # make sure it looks OK
	exit

First chroot:
	exit

CentOS:
	reboot

Booted into Arch with /dev/mapper/vg-swap as /
	mkfs.ext4 /dev/mapper/vg-root
	mkdir /mnt/newsys
	mount -t ext4 /dev/mapper/vg-root /mnt/newsys
	cp -a /boot /etc /home /opt /root /srv /usr /var /mnt/newsys
	cd /mnt/newsys
	ln -s usr/bin bin
	ln -s usr/bin sbin
	ln -s usr/lib lib
	ln -s usr/lib lib64
	mkdir proc sys dev run
	mkdir -m 1777 -p tmp
	mount -t proc /proc proc
	mount --rbind /sys sys
	mount --rbind /dev dev
	mount --rbind /run run
	pacman -S arch-install-scripts
	genfstab -p /mnt/newsys/ > /mnt/newsys/etc/fstab 
	# arch-chroot /mnt/newsys/
	chroot /mnt/newsys /bin/bash

From chroot:
	grub-install --target=i386-pc --recheck /dev/sda
	grub-install --target=i386-pc --recheck /dev/sdb
	grub-mkconfig -o /boot/grub/grub.cfg
	exit

From Arch:
	reboot

After reboot:
	mkswap /dev/mapper/vg-swap
	swapon /dev/mapper/vg-swap
	Add /dev/mapper/vg-swap to /etc/fstab
	Configure server...