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(define-module (tw system vin)
#:use-module (gnu)
#:use-module (gnu bootloader grub)
#:use-module (gnu packages databases)
#:use-module (gnu services admin) ; unattended-upgrade-service-type
#:use-module (gnu services databases)
#:use-module (gnu services docker)
#:use-module (gnu services dbus)
#:use-module (gnu services desktop) ; elogind-service-type
#:use-module (gnu services shepherd)
#:use-module (gnu services syncthing)
#:use-module (gnu system locale)
#:use-module (gnu system nss)
#:use-module (guix gexp)
#:use-module (tw channels)
#:use-module (tw packages finance)
#:use-module (tw services grafana)
#:use-module (tw services restic)
#:use-module (tw system))
;; The device's BIOS does not support UEFI, sadly. It also doesn't recognise
;; NVME devices, so we can only use SATA hard disks, not the M.2 SSD.
;; /dev/sda1 is the https://en.wikipedia.org/wiki/BIOS_boot_partition for grub.
(define grub-boot-disk ; must contain a BIOS boot partition
"/dev/disk/by-id/wwn-0x5000cca39dd469de") ; this is /dev/sda, usually
(define guixsd-root-partition ; /dev/sda2, 500 GB
(uuid "86970883-b074-4673-a993-193287432352" 'btrfs))
(define backups-partition ; /dev/sdb1, 1000 GB
(uuid "383ee9c7-b17e-43c9-9c39-447d63e22b94" 'btrfs))
(define-public %vin-system
(operating-system
(host-name "vin.twilken.net")
(timezone "Europe/Paris")
(locale "en_GB.utf8")
(locale-definitions
(list (locale-definition (name "en_GB.utf8") (source "en_GB"))
(locale-definition (name "de_DE.utf8") (source "de_DE"))
(locale-definition (name "fr_FR.utf8") (source "fr_FR"))
(locale-definition (name "en_US.utf8") (source "en_US"))))
;; Allow resolution of '.local' host names with mDNS.
(name-service-switch %mdns-host-lookup-nss)
;; Choose UK English console keyboard layout.
(keyboard-layout %british-keyboard)
;; Packages installed system-wide. Users can also install packages
;; under their own account: use 'guix search KEYWORD' to search
;; for packages and 'guix install PACKAGE' to install a package.
(packages %base-system-packages)
;; Below is the list of system services. To search for available
;; services, run 'guix system search KEYWORD' in a terminal.
(services
(cons*
(service restic-server-service-type
(restic-server-configuration
(repository-path "/var/backups/restic")
(bind-address
(server-wireguard-address host-name 8181))
(append-only? #t) ; run cleanup jobs separately, using plain restic
(private-repos-only? #t) ; require /user/ path prefix
(prometheus? #t)
(prometheus-auth? #f)))
(service restic-cleanup-service-type
(list (restic-cleanup-repository
;; Laptop backups run at "0 */2 * * *".
(schedule #~"0 5 * * *")
(url "/var/backups/restic/timo/laptop")
(password-file "/etc/restic/timo-laptop")
(keep-within "14d")
(keep-weekly 52)
(keep-monthly -1))
(restic-cleanup-repository
(schedule #~"0 5 * * *")
(url "/var/backups/restic/timo/sync")
(password-file "/etc/restic/timo-sync")
(keep-within "14d")
(keep-weekly 52)
(keep-monthly -1))
;; Phone backups run with a new version of restic, which creates
;; v2 repos by default. Guix' older restic version can't read
;; these, so create the repo on the server before pushing to it.
;; Restic doesn't automatically upgrade the repo version.
;;
;; Phone backups run "hourly" (modulo Android's throttling of
;; the Restic app), but the underlying data changes at most once
;; a day, so use `keep-daily' instead of `keep-within'.
(restic-cleanup-repository
(schedule #~"0 3 * * *")
(url "/var/backups/restic/timo/phone")
(password-file "/etc/restic/timo-phone")
(snapshot-paths '("/storage/FF37-F8E6/SignalBackup"))
;; We only really care about the last signal backup, but guard
;; against accidental deletion by keeping more.
(keep-daily 3))
(restic-cleanup-repository
(schedule #~"0 4 * * *")
(url "/var/backups/restic/timo/phone")
(password-file "/etc/restic/timo-phone")
(snapshot-paths '("/storage/emulated/0/Backups"))
(keep-daily 14)
(keep-monthly -1))
(restic-cleanup-repository
;; OAndBackupX/NeoBackup backups can run until the early-ish
;; morning; cleanup once they're all done and pushed.
(schedule #~"0 11 * * *")
(url "/var/backups/restic/timo/phone")
(password-file "/etc/restic/timo-phone")
(snapshot-paths '("/storage/FF37-F8E6/OAndBackupX"))
(keep-daily 14)
(keep-monthly -1))))
;; For running the Grafana docker container.
(service grafana-service-type
(grafana-configuration
(bind-address (server-wireguard-address host-name))))
(service docker-service-type) ; required by `grafana-service-type'
(service dbus-root-service-type) ; required by `docker-service-type'
(service elogind-service-type) ; required by `docker-service-type'
;; Personal statistics exporter: stores hledger data (and soon location
;; data?) in Postgres for Grafana to read.
(service syncthing-service-type
(syncthing-configuration (user "timo")))
(service postgresql-service-type
(postgresql-configuration
;; hledger-dashboard is linked against libpq from postgresql@14.
;; Using a different Postgres server version is probably fine, though.
(postgresql postgresql-14)))
(simple-service 'hledger-dashboard-roles postgresql-role-service-type
(list (postgresql-role
(name "timo")
(create-database? #t)
(permissions '(login)))))
(simple-service 'hledger-dashboard shepherd-root-service-type
(list (shepherd-service
(provision '(hledger-dashboard))
(requirement '(postgresql syncthing-timo))
(documentation
"Monitor a ledger file and keep a database in sync with it.")
(start #~(make-forkexec-constructor
(list #$(file-append hledger-dashboard "/bin/hledger-dashboard")
;; This is where Syncthing puts the ledger file.
"-f" "/home/timo/sync/ledger/ledger.journal")
#:user "timo" #:group "users"
#:environment-variables
;; Use an appropriate locale so that hledger-dashboard
;; can read the UTF-8 ledger file.
(cons* (string-append
"LC_ALL=" #$(locale-definition-name
(car locale-definitions)))
(default-environment-variables))))
(stop #~(make-kill-destructor)))))
(service unattended-upgrade-service-type
(unattended-upgrade-configuration
(schedule "22 07 * * sat") ; 07:22 every Saturday morning
(maximum-duration (* 40 60)) ; 40 minutes to allow for slow downloads
(services-to-restart
'(mcron wireguard-wg0 syncthing-timo postgresql hledger-dashboard
prometheus-node-exporter restic-server))
(channels %system-channels)
(operating-system-expression
#~(@ (tw system vin) %vin-system))))
(server-base-services host-name)))
;; The list of user accounts ('root' is implicit).
(users %server-base-user-accounts)
;; Use the non-UEFI/legacy BIOS variant of GRUB with the boot header
;; installed on the system/root disk.
(bootloader
(bootloader-configuration
(bootloader grub-bootloader)
(targets (list grub-boot-disk))
(keyboard-layout keyboard-layout)))
;; The list of file systems that get "mounted". The unique
;; file system identifiers there ("UUIDs") can be obtained
;; by running 'blkid' in a terminal.
(file-systems
(cons* (file-system ; this is the smaller (500 GB) disk
(mount-point "/")
(device guixsd-root-partition)
(flags '(no-atime))
(options (alist->file-system-options
'(("compress" . "zstd"))))
(type "btrfs"))
(file-system ; this is the bigger (1000 GB) disk
(mount-point "/var/backups")
(create-mount-point? #t)
(device backups-partition)
(flags '(no-atime))
(options (alist->file-system-options
'(("compress" . "zstd"))))
(type "btrfs"))
%base-file-systems))))
%vin-system
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