##  MoJo's Gentoo install with LUKS, LVM and EFI

Video Tutorial:  https://youtu.be/IzUf-wFEirQ
https://pastebin.com/z406J0RD
https://www.youtube.com/watch?v=4FLhSSsIw-E

### Preparing the disks ###
fdisk -l
parted -a optimal /dev/sda
mklabel gpt
unit mib
mkpart primary 1 3
name 1 grub
set 1 bios_grub on
mkpart primary fat32 3 131
name 2 boot
set 2 BOOT on
mkpart primary 131 -1
name 3 lvm
set 3 lvm on
print
quit

mkfs.vfat -F32 /dev/sda2

### LVM setup ###
cryptsetup -v -y -c aes-xts-plain64 -s 512 -h sha512 -i 5000 --use-random luksFormat /dev/sda3
YES
Enter: passphrase
Verify

cryptsetup luksDump /dev/sda3
cryptsetup luksOpen /dev/sda3 gentoo
Enter passphrase

lvmdiskscan
pvcreate /dev/mapper/gentoo
pvdisplay
vgcreate gentoo /dev/mapper/gentoo
vgdisplay

lvcreate -C y -L 4G gentoo -n swap
lvcreate -L 10GB gentoo -n root
lvcreate -l +100%FREE gentoo -n home
lvdisplay

vgscan (may say running but disabled)
vgchange -ay (should say active now)

mkswap /dev/mapper/gentoo-swap
mkfs.ext4 /dev/mapper/gentoo-root
mkfs.ext4 /dev/mapper/gentoo-home

swapon /dev/mapper/gentoo-swap
mount /dev/mapper/gentoo-root /mnt/gentoo
mkdir /mnt/gentoo/boot
mkdir /mnt/gentoo/home
mount /dev/sda2 /mnt/gentoo/boot
mount /dev/mapper/gentoo-home /mnt/gentoo/home

lsblk /dev/sda
Should print out schematic of lvm


### Installing stage3 ###
cd /mnt/gentoo
links gentoo.org/main/en/mirrors.xml
download Stage3 tarball
sha512sum stage3-amd64-*.tar.xz
tar xpvf stage3-*.tar.xz --xattrs-include='*.*' --numeric-owner

nano -w /mnt/gentoo/etc/portage/make.conf
Set Nexcloud\make_conf\*.txt

### Install Base System ###
mirrorselect -i -o >> /mnt/gentoo/etc/portage/make.conf
mkdir /mnt/gentoo/etc/portage/repos.conf
cp /mnt/gentoo/usr/share/portage/config/repos.conf /mnt/gentoo/etc/portage/repos.conf/gentoo.conf
cp --dereference /etc/resolv.conf /mnt/gentoo/etc/

mount --types proc /proc /mnt/gentoo/proc
mount --rbind /sys /mnt/gentoo/sys
mount --rbind /dev /mnt/gentoo/dev

#### Prepare chroot environment with lvmetad service (needed for grub-mkconfig when using lvm) ####
mkdir /mnt/gentoo/hostrun
mount --bind /run /mnt/gentoo/hostrun/

chroot /mnt/gentoo /bin/bash && source /etc/profile && export PS1="(chroot) $PS1"

#### Now mount lvmetad service for grub-mkconfig ####
mkdir /run/lvm
mount --bind /hostrun/lvm /run/lvm/

#### Configuring Portage ####
emerge-webrsync
emerge --sync

eselect profile list
eselect profile set X

echo "Europe/Amsterdam" > /etc/timezone
emerge --config sys-libs/timezone-data

nano -w /etc/locale.gen
locale-gen

eselect locale list
eselect locale set 4

emerge --ask --verbose --update --deep --newuse @world
dispatch-conf

emerge --ask --verbose vim sys-kernel/gentoo-sources plymouth sys-apps/pciutils lvm2 sys-kernel/genkernel-next  app-editors/vim app-portage/flaggie
emerge --verbose --oneshot app-portage/cpuid2cpuflags sys-apps/kmod
env-update && source /etc/profile && export PS1="(chroot) ${PS1}"
### Configuring the kernel ###
cd /usr/src/linux
genkernel --makeopts=-j3 --menuconfig --lvm --luks all
or
make menuconfig
    lvm requirements
    luks requirements (sha512,AES)
make && make modules_install
make install

### Configuring the system ###
vim /etc/fstab
# <file system>				<dir>		<type>	<options>		<dump>  <pass>
/dev/sda2				/boot		ext2	noatime		0	2
/dev/mapper/gentoo-root			/		ext4	defaults,rw,relatime,data=ordered    0 1
/dev/mapper/gentoo-home			/home		ext4	rw,relatime,data=ordered	0 2
/dev/mapper/gentoo-swap			none		swap    defaults                    	0	0

passwd

useradd -m -G users,wheel,audio,video -s /bin/bash main
passwd main

rm stage*

echo "home" > /etc/hostname
vim /etc/hosts
home    localhost
""
### Installing system tools ###
emerge -av app-admin/sysklogd sys-process/cronie sys-apps/mlocate net-misc/dhcpcd app-misc/tmux
rc-update add sysklogd default
rc-update add cronie default
rc-update add sshd default
rc-update add lvm boot

emerge -av sys-kernel/linux-firmware net-tools app-text/tree
tree /sys/class/net

emerge --ask --noreplace net-misc/netifrc
vim /etc/conf.d/net
config_enp0s3="dhcp"

cd /etc/init.d
ln -s net.lo net.enp0s3
rc-update add net.enp0s3 default

vim /etc/rc.conf
vim /etc/conf.d/keymaps
vim /etc/conf.d/hwclock
clock="local"

### Configuring the bootloader/GRUB install ###
echo 'GRUB_PLATFORMS="emu efi-64 pc"' >> /etc/portage/make.conf
flaggie grub +mount +device-mapper
emerge -av sys-boot/grub:2 sys-kernel/linux-firmware sys-fs/e2fsprogs sys-fs/dosfstools

vim /etc/default/grub
GRUB_PRELOAD_MODULES=lvm
GRUB_ENABLE_CRYPTODISK=y
GRUB_DEVICE=/dev/ram0
GRUB_CMDLINE_LINUX="crypt_root=/dev/sda3 real_root=/dev/mapper/gentoo-root rootfstype=ext4 dolvm quiet splash"
(remove quiet splash for debugging)
grub-install --target=x86_64-efi --efi-directory=/boot --modules="linux crypto search_fs_uuid luks lvm" --recheck /dev/sda
grub-mkconfig -o /boot/grub/grub.cfg

exit
cd ~

umount -l /mnt/gentoo/dev{/shm,/pts,}
umount -R /mnt/gentoo

reboot

should see "Enter passphrase for /dev/sda2"

echo "SOLARIZED=TRUE" > /etc/eixrc/99-color
SOLARIZED=true

### Updating Plymouth Theme ###

plymouth-set-default-theme --list
plymouth-set-default-theme set X

## Gentoo Rescue ##
mkdir /mnt/gentoo
mount /dev/sda3 /mnt/gentoo

Next, bindmount /proc, /dev and /sys on top the /mnt/gentoo mountpoint:
mount --rbind /proc /mnt/gentoo/proc
mount --rbind /dev /mnt/gentoo/dev
mount --rbind /sys /mnt/gentoo/sys

Finally, chroot into the environment, mount the remaining partitions, and start recovering the system:
chroot /mnt/gentoo /bin/sh
source /etc/profile
mount -a

Once finished with the recovery steps, umount all partitions, exit the chroot, umount the remaining partitions, and reboot back into the system to see if the recovery has succeeded:
umount -a
exit
umount -l /mnt/gentoo/{dev,proc,sys,}
sync
reboot