Gentoo with OpenRC on Virtualbox

# Note: Still WIP
#
# Create a virtual machine, with 8GB + 4cpus. This such that compilation
# goes fast and you can pass for jobs (-j4) to make.
#

#
# Use any disk to boot. I used the archlinux boot disk because it works
# and it has the genfstab utility which makes it easy to create the mount table.
#
# For cases where VM is booting into high dpi display.
# Not needed if you scale the VM to 200% from the VirtualBox UI
# Set large font
setfont latarcyrheb-sun32
#
# Set root password and start sshd to connect from
# terminal in host
#
passwd
systemctl start sshd
#
# Get VM ip address
#
ip a
#
# Now, from host connect via ssh to root@address returned above.
# Has the advantage that you can copy/paste commands into console.
#
# Sync clock
timedatectl set-ntp true
#
# Create 4 partitions:
# Create GRUB boot, boot, swap and root primary partitions
# For partitioning, follow instructions at
# https://wiki.gentoo.org/wiki/Handbook:AMD64/Installation/Disks
#
parted -a optimal /dev/sda
#
# Formatting
# Boot partition as ext2 because we are doing BIOS boot
# so no UEFI / vfat needed.
#
mkfs.ext2 /dev/sda2
#
# Format and mount the swap area
#
mkswap /dev/sda3
swapon /dev/sda3
#
# Create the btrfs partitions
#
mkfs.btrfs /dev/sda4
# Create btrfs subvolumes
mkdir /mnt/gentoo
mount -t btrfs /dev/sda4 /mnt/gentoo
btrfs subvolume create /mnt/gentoo/@root
btrfs subvolume create /mnt/gentoo/@var
btrfs subvolume create /mnt/gentoo/@home
btrfs subvolume create /mnt/gentoo/@snapshots
# 
# dismount btrfs 
#
umount /mnt/gentoo
#
# Mount btrfs as subvolumes
#
mount -o subvol=@root /dev/sda4 /mnt/gentoo
mkdir /mnt/gentoo/{var,home,.snapshots}
mount -o subvol=@var /dev/sda4 /mnt/gentoo/var
mount -o subvol=@home /dev/sda4 /mnt/gentoo/home
mount -o subvol=@snapshots /dev/sda4 /mnt/gentoo/.snapshots
#
# Mount boot / EFI partition
#
mkdir -p /mnt/gentoo/boot
mount /dev/sda2 /mnt/gentoo/boot
#
# Let's use Arch's genfstab to generate the /etc/fstab
#
genfstab -L /mnt >> /mnt/gentoo/etc/fstab
#
# Pull the stage 3 tarball and install it
#
cd /mnt/gentoo
#
# Somehow, get the tarball to /mnt/gentoo
#
links https://www.gentoo.org/downloads/mirrors/
#
# Unpack the tarball
#
tar xpvf stage3-*.tar.xz --xattrs-include='*.*' --numeric-owner
#
# Edit /etc/portage/make.conf and include COMMON_FLAGS="-march=native..." and
# MAKEOPTS="-j4"
#
nano /etc/portage/make.conf
#
# Copy dns info into root partition for chrooted network to function properly
#
cp --dereference /etc/resolv.conf /mnt/gentoo/etc/
#
# Preparing additional mounts for chroot
#
mount --types proc /proc /mnt/gentoo/proc
mount --rbind /sys /mnt/gentoo/sys
mount --rbind /dev /mnt/gentoo/dev

#
# chroot into the mounted area and continue in the
# disk.
#
chroot /mnt/gentoo /bin/bash
#
# Note that all the bash history from here is recorded in root user
# on root partition
#
source /etc/profile
export PS1="(chroot) $PS1"
#
# Installing a Gentoo ebuild repository snapshot from the web
#
emerge-webrsync
#
# Verify default profile
#
eselect profile list
emerge --ask --verbose --update --deep --newuse @world

ls /usr/share/zoneinfo/

echo "US/Pacific" > /etc/timezone
emerge --config sys-libs/timezone-data
#
# Get a better editor.
#
emerge vim
#
# locale.gen only seemed to have C locale, so I had
# to add US utf-8
#
echo "en_US.UTF-8 UTF-8" >> /etc/locale.gen

locale-gen
eselect locale list
eselect locale set 4

. /etc/profile
#
# Reload environment
#
env-update && source /etc/profile && export PS1="(chroot) $PS1"

#
# Get kernel sources
#
emerge --ask sys-kernel/gentoo-sources
#
# This is only needed if I need to get some PCI dev data using lspci
#
emerge sys-apps/pciutils
lspci
#
# config + build kernel
#
cd /usr/src/linux
#
# Create a default /usr/src/linux/.config
#
make defconfig
#
# Tweak things. I only needed to add btrfs support
#
make menuconfig
time make -j4
make modules_install
make install
#
# Generate initramfs because we have /var and /home mounted, so
# better have them available on boot, just in case.
#
etc-update
emerge --ask sys-kernel/genkernel
genkernel --install --kernel-config=/boot/config-5.4.92-gentoo  initramfs
#
# Just look at the modules installed above.
#
find /lib/modules/5.4.92-gentoo/ -type f -iname '*.o' -or -iname '*.ko'
#
# Hostname for this machine
#
cat /etc/conf.d/hostname <<eof
# Set to the hostname of this machine
hostname="<your-machine-name>"
eof
#
#
emerge --ask --noreplace net-misc/netifrc
#
# obtain the name of the network interface
#
ip a
#
# Set the interface to work with dhcp
#
cat > /etc/conf.d/net <<eof
config_<your-nic>="dhcp"
eof
#
# Now we link the interface such that it boots
#
cd /etc/init.d
ln -s net.lo net.<your-nic>
rc-update add net.<your-nic> default

cat /etc/hosts
vim /etc/hosts
#
# Set preferred keyboard
#
sed --in-place /etc/conf.d/keymaps -e 's/^keymap.*$/keymap="dvorak"/'
#
# Start sshd at boot time
#
rc-update add sshd default
#
# Add fs maintenance tools
#
emerge sys-fs/btrfs-progs
emerge sys-fs/e2fsprogs
#
# Add a dhcp client
#
emerge --ask net-misc/dhcpcd
#
# Let's get grub 2
#
emerge --ask --verbose sys-boot/grub:2
#
# Install grub boot loader to /dev/sda
#
grub-install /dev/sda
#
# Add dobtrfs parameter to command line. Will be used
# when creating the grub configuration next.
#
echo 'GRUB_CMDLINE_LINUX="dobtrfs"' >> /etc/default/grub
#
# Create a grub configuration
#
grub-mkconfig -o /boot/grub/grub.cfg
#
# Verify dobtrfs parameter made it to the grub.cfg file
#
grep dobtrfs /boot/grub/grub.cfg
#
# Install sudo
#
emerge sudo
#
# Set root passwd
#
passwd
#
# Add a user. Replace 'user1' by your non-root login user.
useradd -m -g users -G wheel -s /bin/bash user1
passwd user1
echo 'user1 ALL=(ALL) ALL' > /etc/sudoers.d/user1
#
# Verify all packages installed
#
cat /var/lib/portage/world