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Install Gentoo on BtrFS subvolumes + UEFI
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| #!/usr/bin/env bash | |
| # WARNING!! | |
| # This will obliterate all the data in your partition!! (not actually true, but act as if it was) | |
| # Do NOT execute this script if you don't fully understand it! | |
| # a few vars | |
| amount_of_swap=$( free --si -g | grep Mem: | gawk '{ print $2 + 1}' ) | |
| # create directories | |
| mkdir -p /mnt/gentoo | |
| # create partitions | |
| # I would add your amount of RAM + something (1 GB maybe?) to the swap partition (#3) instead of 9. | |
| sgdisk -Z /dev/vda | |
| sgdisk -o /dev/vda | |
| sgdisk -n 1::+1024M -t 1:ef02 /dev/vda | |
| sgdisk -n 2::+1G -t 2:8300 /dev/vda | |
| sgdisk -n 3::+${amount_of_swap}G -t 3:8200 /dev/vda | |
| sgdisk -n 4:: -t 4:8300 /dev/vda | |
| # create filesystems | |
| mkfs -t vfat -F 32 /dev/vda1 | |
| mkfs -t btrfs -L boot /dev/vda2 | |
| mkfs -t btrfs -L btrfsroot /dev/vda4 | |
| mkswap /dev/vda3 | |
| # mount | |
| ## root | |
| mount /dev/vda4 /mnt/gentoo | |
| mkdir -p /mnt/gentoo/boot | |
| ## boot | |
| mount /dev/vda2 /mnt/gentoo/boot | |
| mkdir -p /mnt/gentoo/boot/efi | |
| # create subvols | |
| cd /mnt/gentoo | |
| btrfs subvol create root | |
| btrfs subvol create home | |
| btrfs subvol create srv | |
| btrfs subvol create var | |
| # unmount | |
| cd .. | |
| umount -l gentoo |
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| #!/usr/bin/env bash | |
| # This is a recipe; not a script. You should try to run it chunk by chunck. | |
| # The shebang is only for syntax highlighting | |
| # Chroot | |
| ## Please, run this right after running script 00 | |
| mount -o defaults,relatime,compress=lzo,autodefrag,subvol=root /dev/vda4 /mnt/gentoo | |
| ## create dirs for mounts | |
| cd /mnt/gentoo | |
| mkdir srv home root var boot | |
| ## mount | |
| mount -o defaults,relatime,compress=lzo,autodefrag,subvol=home /dev/vda4 /mnt/gentoo/home | |
| mount -o defaults,relatime,compress=lzo,autodefrag,subvol=srv /dev/vda4 /mnt/gentoo/srv | |
| mount -o defaults,relatime,compress=lzo,autodefrag,subvol=var /dev/vda4 /mnt/gentoo/var | |
| mount -o defaults,relatime /dev/vda2 /mnt/gentoo/boot | |
| ### efi partition | |
| mount -o defaults,noatime /dev/vda1 /mnt/gentoo/boot/efi | |
| ## get gentoo stage3 | |
| curl -LO https://bouncer.gentoo.org/fetch/root/all/releases/amd64/autobuilds/20211121T170545Z/stage3-amd64-nomultilib-systemd-20211121T170545Z.tar.xz | |
| ## uncompress | |
| tar -xapf stage3-amd64-nomultilib-systemd-20211121T170545Z.tar.xz | |
| rm -f $_ | |
| ## mount proc, sys and dev | |
| mount --types proc /proc /mnt/gentoo/proc | |
| mount --rbind /sys /mnt/gentoo/sys | |
| mount --make-rslave /mnt/gentoo/sys | |
| mount --rbind /dev /mnt/gentoo/dev | |
| mount --make-rslave /mnt/gentoo/dev | |
| ## activate swap | |
| swapon /dev/vda3 | |
| ## get dns | |
| cp -u /etc/resolv.conf /mnt/gentoo/etc/ | |
| ## chroot | |
| env -i HOME=/root TERM=$TERM chroot . bash -l | |
| ## environment | |
| env-update | |
| source /etc/profile | |
| export PS1="(chroot) $PS1" | |
| # emerge | |
| ## sync repo first | |
| emaint -A sync | |
| ## update portage | |
| emerge --oneshot portage | |
| # portage (git) | |
| # ref: https://wiki.gentoo.org/wiki/Portage_with_Git | |
| ## install dependencies for emerge with git | |
| emerge -Dju app-eselect/eselect-repository dev-vcs/git | |
| ## setup portage to use git instead of rsync | |
| eselect repository remove gentoo | |
| eselect repository add gentoo git https://github.com/gentoo-mirror/gentoo.git | |
| rm -r /var/db/repos/gentoo | |
| ## sync | |
| emaint sync -r gentoo | |
| # Setup | |
| ## fstab | |
| cat << 'EOF' > /etc/fstab | |
| # <fs> <mountpoint> <type> <opts> <dump/pass> | |
| shm /dev/shm tmpfs nodev,nosuid,noexec 0 0 | |
| /dev/vda4 / btrfs rw,relatime,compress=zstd:1,autodefrag,subvol=root 0 0 | |
| /dev/vda4 /home btrfs rw,relatime,compress=zstd:1,autodefrag,subvol=home 0 0 | |
| /dev/vda4 /srv btrfs rw,relatime,compress=zstd:1,autodefrag,subvol=srv 0 0 | |
| /dev/vda4 /var btrfs rw,relatime,compress=zstd:1,autodefrag,subvol=var 0 0 | |
| /dev/vda3 none swap sw 0 0 | |
| /dev/vda2 /boot btrfs rw,relatime 1 2 | |
| /dev/vda1 /boot/efi vfat umask=0077,shortname=winnt 0 2 | |
| EOF | |
| ## local time in MX | |
| ln -sf /usr/share/zoneinfo/Etc/UTC /etc/localtime | |
| ## add cpu flags | |
| emerge app-portage/cpuid2cpuflags | |
| cpu_flags=$( cpuid2cpuflags | cut -d ' ' -f '2-' ) | |
| ## append to my make.conf | |
| use_remove='-accessibility -altivec -apache2 -aqua -big-endian -bindist -boundschecking -bsf -canna -clamav -connman -coreaudio -custom-cflags -debug -dedicated -emacs -handbook -ibm -infiniband -iwmmxt -kde -kontact -libav -libedit -libressl -libsamplerate -mono -mule -neon -oci8 -oci8-instant-client -oracle -oss -pch -pcmcia -plasma -qmail-spp -qt4 -qt5 -static -syslog -sysvipc -tcpd -xemacs -yahoo -zsh-completion' | |
| use_add='symlink unicode vim-syntax' | |
| make_opts="-j$(( $( nproc ) + 1 ))" | |
| cat << EOF > /etc/portage/make.conf | |
| CFLAGS="-mtune=native -O2 -pipe" | |
| CXXFLAGS=\${CFLAGS} | |
| CHOST="x86_64-pc-linux-gnu" | |
| CPU_FLAGS_X86="${cpu_flags}" | |
| GRUB_PLATFORMS="efi-64" | |
| # enable this if you like living on the edge | |
| #ACCEPT_KEYWORDS="~amd64" | |
| MAKEOPTS="${make_opts}" | |
| ADD="${use_add}" | |
| REMOVE="${use_remove}" | |
| USE="\$REMOVE \$ADD" | |
| # Portage Opts | |
| FEATURES="parallel-fetch parallel-install ebuild-locks" | |
| EMERGE_DEFAULT_OPTS="--with-bdeps=y" | |
| AUTOCLEAN="yes" | |
| EOF | |
| ## set profiles | |
| eselect profile set default/linux/amd64/17.1/no-multilib/systemd/merged-usr | |
| ## update everything and cleanup | |
| emerge -DNju @world | |
| emerge -c | |
| ## configure os-prober to mount grub | |
| cat << 'EOF' > /etc/portage/package.use/os-prober | |
| >=sys-boot/grub-2.06-r7 mount | |
| EOF | |
| ## install useful apps | |
| emerge -DNju vim bash-completion btrfs-progs | |
| emerge -DNju app-portage/eix app-portage/gentoolkit sys-process/htop sys-process/lsof sys-boot/os-prober | |
| ## install vanilla sources and genkernel-next | |
| mkdir -p /etc/portage/package.license | |
| cat << 'EOF' > /etc/portage/package.license/linux-firmware | |
| sys-kernel/linux-firmware linux-fw-redistributable no-source-code | |
| EOF | |
| emerge -DNju genkernel sys-kernel/gentoo-sources sys-kernel/linux-firmware | |
| ## Remember to enable: | |
| ## * all virtio devices; at least: virtio_pci and virtio_blk | |
| ## * btrfs support | |
| genkernel --menuconfig --btrfs --virtio all | |
| # Configure real root and stuff | |
| # Do not forget to append systemd to the kernel command line: GRUB_CMDLINE_LINUX="real_init=/lib/systemd/systemd quiet" | |
| vim /etc/default/grub | |
| ## install grub | |
| grub-install --target=x86_64-efi --efi-directory=/boot/efi | |
| # update grub | |
| grub-mkconfig -o /boot/grub/grub.cfg | |
| # systemd | |
| ## Setup machine ID to activate journaling | |
| systemd-machine-id-setup | |
| ## DHCP | |
| cat << 'EOF' > /etc/systemd/network/20-default.network | |
| [Match] | |
| Name = enp* | |
| [Network] | |
| DHCP = yes | |
| EOF | |
| systemctl enable systemd-networkd.socket | |
| # set root password | |
| passwd | |
| # reboot (and pray, think wishfully, cross your fingers or whatever you do to influence reality... not!) | |
| reboot | |
| # after reboot | |
| ## set hostname | |
| # hostnamectl set-hostname my.example.tld | |
| ## set locale (after reboot) | |
| # localectl set-locale LANG=<LOCALE> | |
| ## set time and date | |
| # timedatectl --help |
Glad to know it was useful! :D
This seems to be missing information regarding EFI. I don't see you mounting your EFI partition at any point. I'm not a noob, but I'm not an expert, but /dev/sda1 should be mounted on the efi directory under /boot BEFORE you can install grub. Unless I'm overlooking something?
EDIT: Otherwise very helpful, Thank you for this. Helped since I know what I need to do, just not always the order or specific commands by memory and I don't always want to dig through the Gentoo Handbook.
@oicydwa you're correct! I overlooked that part. Thank you for pointing it out. :D
I'll see if I can work on it during the weekend. If you can give it a try and figure it out, please, report it back so we can improve this one. :)
I'll see if I can work on it during the weekend. If you can give it a try and figure it out, please, report it back so we can improve this one. :)
Really all that's needed is to mount (according to your example) /dev/sda1 (the efi partition) to /boot/efi.
So basically insert below anytime before grub-install:
mkdir /boot/efi
mount /dev/sda1 /boot/efi
Or if before chroot:
mkdir /mnt/gentoo/boot/efi
mount /dev/sda1 /mnt/gentoo/boot/efi
@oicydwa it took more than that. Had to add something to make.conf and the grub install command changes.
OK, updated at Thu Nov 25, 2021. It works at the time of update! ;D
Fixed fstab's /boot/efi entry.
Finished updating it.
Added:
- portage using git (much faster syncs and as many as you like during the day)
- some random fixes.
- relatime where possible.
- merged-usr.
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well done, super helpful