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;; This is an operating system configuration file for a fairly minimal
;; "desktop" setup with i3 where the /home partition partition is
;; encrypted with LUKS.
;;
;; https://guix.gnu.org/manual/en/html_node/operating_002dsystem-Reference.html
(define-module (tw system cern)
#:use-module (gnu)
#:use-module (gnu bootloader grub)
#:use-module (gnu system locale)
#:use-module (gnu system nss)
#:use-module (guix gexp)
#:use-module (guix packages)
#:use-module ((nongnu packages linux) #:prefix nongnu:)
#:use-module ((nongnu system linux-initrd) #:prefix nongnu:)
#:use-module (tw channels)
#:use-module (tw services wireguard)
#:use-module (tw system))
(use-package-modules certs cups disk docker file-systems freedesktop gnome
kerberos linux mtools pulseaudio search shells wm xorg)
(use-service-modules admin authentication avahi base cups dbus desktop docker
kerberos linux mcron networking pm shepherd ssh syncthing
vpn xorg)
(define efi-system-partition ; /dev/nvme0n1p1
(uuid "7E1B-8A5B" 'fat))
(define guixsd-root-partition ; /dev/nvme0n1p2
(uuid "933d1bec-14ec-4421-aa4d-93846c68f27c" 'btrfs))
(define-public %cern-system
(operating-system
(host-name "twilkenlaptop.cern.ch")
(timezone "Europe/Zurich")
(locale "en_GB.utf8")
(locale-definitions
(list (locale-definition (name "en_GB.utf8") (source "en_GB"))
(locale-definition (name "en_US.utf8") (source "en_US"))
(locale-definition (name "fr_FR.utf8") (source "fr_FR"))))
;; Use non-free kernel to load non-free firmware (e.g. for wifi).
;; Enable MT7921 module for Mediatek MT7922 (AMD RZ616) WiFi card.
;; The MT7921E module is for the card connected via PCIe, which it is
;; (it's in an M.2 slot). Alternatives are S (SDIO) and U (USB).
(kernel nongnu:linux)
(kernel-loadable-modules (list ddcci-driver-linux v4l2loopback-linux-module))
(initrd nongnu:microcode-initrd)
(firmware (cons* nongnu:i915-firmware nongnu:ibt-hw-firmware nongnu:sof-firmware
nongnu:iwlwifi-firmware %base-firmware))
;; Allow resolution of '.local' host names with mDNS.
(name-service-switch %mdns-host-lookup-nss)
;; Choose UK English X11 keyboard layout.
(keyboard-layout %british-keyboard)
;; Use the UEFI variant of GRUB with the EFI System
;; Partition mounted on /boot/efi.
(bootloader
(bootloader-configuration
(bootloader grub-efi-bootloader)
(targets '("/boot/efi"))
;; Note: keyboard-layout is ignored by non-grub bootloaders.
(keyboard-layout keyboard-layout)))
(file-systems
(cons* (file-system
(device guixsd-root-partition)
(mount-point "/")
(flags '(no-atime))
(options (alist->file-system-options
'("ssd" ("compress" . "zstd"))))
(type "btrfs"))
(file-system
(device efi-system-partition)
(mount-point "/boot/efi")
(flags '(no-atime))
(type "vfat"))
%base-file-systems))
;; Members of the wheel group are allowed to use sudo.
(users (cons* (user-account
(name "twilken")
(comment "Timo Wilken")
(group "users")
(supplementary-groups
'("wheel" "audio" "video" "docker"))
(shell (file-append zsh "/bin/zsh")))
%base-user-accounts))
(sudoers-file
(plain-file "sudoers"
(string-append
;; We need to preserve $TERMINFO so that programs under sudo can
;; find kitty's terminfo files. This is possibly unsafe; sudo
;; explicitly deletes this variable by default.
"Defaults env_keep += \"TERMINFO\"\n" ; for kitty
"Defaults env_keep += \"TERMINFO_DIRS\"\n" ; for foot
(plain-file-content %sudoers-specification)
;; In addition to the default rules, allow admins to power off
;; the computer. They'll have to use the system binaries, not
;; those from their user profile, as /etc/sudoers requires
;; absolute paths to commands.
"%wheel ALL=(ALL) NOPASSWD: "
"/run/current-system/profile/sbin/halt, "
"/run/current-system/profile/sbin/reboot, "
"/run/current-system/profile/sbin/shutdown\n")))
;; Use the "desktop" services, which include the X11
;; log-in service, networking with NetworkManager, and more.
;; See info '(guix)Services' for useful services.
(services
(cons*
(service bluetooth-service-type)
(service tlp-service-type
(tlp-configuration ; see also: radeon-* properties
(cpu-scaling-governor-on-ac '("powersave"))
(cpu-scaling-governor-on-bat '("powersave"))
(energy-perf-policy-on-ac "powersave")
(energy-perf-policy-on-bat "powersave")
(sched-powersave-on-ac? #t)
(sched-powersave-on-bat? #t)
(cpu-boost-on-ac? #t)))
(service openntpd-service-type
(openntpd-configuration
;; Use CERN time servers. Fall back to default servers outside CERN
;; (in `servers' key, so not overwritten).
(server '("ip-time-0.cern.ch"
"ip-time-1.cern.ch"
"ip-time-2.cern.ch"))))
(modify-services (enduser-system-services
#:host-name host-name
#:cores 12
#:work-system? #t
#:wayland? #t
#:wireless-interface "wlp0s20f3"
#:backlight-device "intel_backlight")
;; openntpd works better.
(delete ntp-service-type)
(delete tw-wireguard-service-type))))))
%cern-system
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