633 lines
24 KiB
Scheme
633 lines
24 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2020 Maxim Cournoyer <maxim.cournoyer@gmail.com>
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;;; Copyright © 2020 Brice Waegeneire <brice@waegenei.re>
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;;; Copyright © 2020, 2023 Efraim Flashner <efraim@flashner.co.il>
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;;; Copyright © 2021 raid5atemyhomework <raid5atemyhomework@protonmail.com>
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;;; Copyright © 2021 B. Wilson <elaexuotee@wilsonb.com>
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;;; Copyright © 2022 Josselin Poiret <dev@jpoiret.xyz>
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;;; Copyright © 2023 Bruno Victal <mirai@makinata.eu>
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;;; Copyright © 2023 Felix Lechner <felix.lechner@lease-up.com>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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;;; GNU Guix is free software; you can redistribute it and/or modify it
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;;; under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 3 of the License, or (at
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;;; your option) any later version.
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;;;
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;;; GNU Guix is distributed in the hope that it will be useful, but
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
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(define-module (gnu services linux)
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#:use-module (guix diagnostics)
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#:use-module (guix gexp)
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#:use-module (guix records)
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#:use-module (guix modules)
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#:use-module (guix i18n)
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#:use-module (guix ui)
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#:use-module (gnu services)
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#:use-module (gnu services admin)
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#:use-module (gnu services base)
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#:use-module (gnu services configuration)
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#:use-module (gnu services mcron)
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#:use-module (gnu services shepherd)
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#:use-module (gnu packages linux)
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#:use-module (srfi srfi-1)
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#:use-module (srfi srfi-26)
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#:use-module (srfi srfi-34)
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#:use-module (srfi srfi-35)
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#:use-module (srfi srfi-171)
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#:use-module (ice-9 format)
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#:use-module (ice-9 match)
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#:export (earlyoom-configuration
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earlyoom-configuration?
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earlyoom-configuration-earlyoom
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earlyoom-configuration-minimum-available-memory
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earlyoom-configuration-minimum-free-swap
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earlyoom-configuration-prefer-regexp
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earlyoom-configuration-avoid-regexp
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earlyoom-configuration-memory-report-interval
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earlyoom-configuration-ignore-positive-oom-score-adj?
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earlyoom-configuration-show-debug-messages?
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earlyoom-configuration-send-notification-command
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earlyoom-service-type
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fstrim-configuration
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fstrim-configuration?
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fstrim-configuration-package
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fstrim-configuration-schedule
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fstrim-configuration-listed-in
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fstrim-configuration-verbose?
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fstrim-configuration-quiet-unsupported?
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fstrim-configuration-extra-arguments
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fstrim-service-type
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kernel-module-loader-service-type
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cachefilesd-configuration
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cachefilesd-configuration?
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cachefilesd-configuration-cachefilesd
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cachefilesd-configuration-debug-output?
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cachefilesd-configuration-use-syslog?
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cachefilesd-configuration-scan?
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cachefilesd-configuration-cache-directory
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cachefilesd-configuration-cache-name
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cachefilesd-configuration-security-context
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cachefilesd-configuration-pause-culling-for-block-percentage
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cachefilesd-configuration-pause-culling-for-file-percentage
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cachefilesd-configuration-resume-culling-for-block-percentage
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cachefilesd-configuration-resume-culling-for-file-percentage
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cachefilesd-configuration-pause-caching-for-block-percentage
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cachefilesd-configuration-pause-caching-for-file-percentage
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cachefilesd-configuration-log2-table-size
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cachefilesd-configuration-cull?
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cachefilesd-configuration-trace-function-entry-in-kernel-module
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cachefilesd-configuration-trace-function-exit-in-kernel-module
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cachefilesd-configuration-trace-internal-checkpoints-in-kernel-module
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cachefilesd-service-type
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rasdaemon-configuration
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rasdaemon-configuration?
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rasdaemon-configuration-record?
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rasdaemon-service-type
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zram-device-configuration
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zram-device-configuration?
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zram-device-configuration-size
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zram-device-configuration-compression-algorithm
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zram-device-configuration-memory-limit
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zram-device-configuration-priority
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zram-device-service-type))
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;;;
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;;; Early OOM daemon.
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;;;
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(define-record-type* <earlyoom-configuration>
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earlyoom-configuration make-earlyoom-configuration
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earlyoom-configuration?
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(earlyoom earlyoom-configuration-earlyoom
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(default earlyoom))
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(minimum-available-memory earlyoom-configuration-minimum-available-memory
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(default 10)) ; in percent
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(minimum-free-swap earlyoom-configuration-minimum-free-swap
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(default 10)) ; in percent
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(prefer-regexp earlyoom-configuration-prefer-regexp ; <string>
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(default #f))
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(avoid-regexp earlyoom-configuration-avoid-regexp ; <string>
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(default #f))
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(memory-report-interval earlyoom-configuration-memory-report-interval
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(default 0)) ; in seconds; 0 means disabled
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(ignore-positive-oom-score-adj?
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earlyoom-configuration-ignore-positive-oom-score-adj? (default #f))
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(run-with-higher-priority? earlyoom-configuration-run-with-higher-priority?
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(default #f))
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(show-debug-messages? earlyoom-configuration-show-debug-messages?
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(default #f))
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(send-notification-command
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earlyoom-configuration-send-notification-command ; <string>
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(default #f)))
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(define (earlyoom-configuration->command-line-args config)
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"Translate a <earlyoom-configuration> object to its command line arguments
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representation."
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(match config
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(($ <earlyoom-configuration> earlyoom minimum-available-memory
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minimum-free-swap prefer-regexp avoid-regexp
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memory-report-interval
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ignore-positive-oom-score-adj?
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run-with-higher-priority? show-debug-messages?
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send-notification-command)
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`(,(file-append earlyoom "/bin/earlyoom")
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,@(if minimum-available-memory
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(list "-m" (format #f "~s" minimum-available-memory))
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'())
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,@(if minimum-free-swap
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(list "-s" (format #f "~s" minimum-free-swap))
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'())
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,@(if prefer-regexp
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(list "--prefer" prefer-regexp)
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'())
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,@(if avoid-regexp
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(list "--avoid" avoid-regexp)
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'())
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"-r" ,(format #f "~s" memory-report-interval)
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,@(if ignore-positive-oom-score-adj?
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(list "-i")
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'())
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,@(if run-with-higher-priority?
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(list "-p")
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'())
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,@(if show-debug-messages?
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(list "-d")
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'())
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,@(if send-notification-command
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(list "-N" send-notification-command)
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'())))))
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(define (earlyoom-shepherd-service config)
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(shepherd-service
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(documentation "Run the Early OOM daemon.")
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(provision '(earlyoom))
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(requirement '(user-processes))
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(start #~(make-forkexec-constructor
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'#$(earlyoom-configuration->command-line-args config)
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#:log-file "/var/log/earlyoom.log"))
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(stop #~(make-kill-destructor))))
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(define %earlyoom-log-rotation
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(list (log-rotation
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(files '("/var/log/earlyoom.log")))))
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(define earlyoom-service-type
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(service-type
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(name 'earlyoom)
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(default-value (earlyoom-configuration))
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(extensions
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(list (service-extension shepherd-root-service-type
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(compose list earlyoom-shepherd-service))
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(service-extension rottlog-service-type
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(const %earlyoom-log-rotation))))
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(description "Run @command{earlyoom}, a daemon that quickly responds to
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@acronym{OOM, out-of-memory} conditions by terminating relevant processes.")))
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;;;
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;;; fstrim
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;;;
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(define (mcron-time? x)
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(or (procedure? x) (string? x) (list? x)))
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(define-maybe list-of-strings (prefix fstrim-))
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(define (fstrim-serialize-boolean field-name value)
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(list (format #f "~:[~;--~a~]" value
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;; Drop trailing '?' character.
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(string-drop-right (symbol->string field-name) 1))))
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(define (fstrim-serialize-list-of-strings field-name value)
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(list (string-append "--" (symbol->string field-name))
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#~(string-join '#$value ":")))
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(define-configuration fstrim-configuration
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(package
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(file-like util-linux)
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"The package providing the @command{fstrim} command."
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empty-serializer)
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(schedule
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(mcron-time "0 0 * * 0")
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"Schedule for launching @command{fstrim}. This can be a procedure, a list
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or a string. For additional information, see @ref{Guile Syntax,,
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Job specification, mcron, the mcron manual}. By default this is set to run
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weekly on Sunday at 00:00."
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empty-serializer)
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;; The following are fstrim-related options.
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(listed-in
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(maybe-list-of-strings '("/etc/fstab" "/proc/self/mountinfo"))
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;; Note: documentation sourced from the fstrim manpage.
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"List of files in fstab or kernel mountinfo format. All missing or
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empty files are silently ignored. The evaluation of the list @emph{stops}
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after the first non-empty file. File systems with @code{X-fstrim.notrim} mount
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option in fstab are skipped.")
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(verbose?
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(boolean #t)
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"Verbose execution.")
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(quiet-unsupported?
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(boolean #t)
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"Suppress error messages if trim operation (ioctl) is unsupported.")
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(extra-arguments
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maybe-list-of-strings
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"Extra options to append to @command{fstrim} (run @samp{man fstrim} for
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more information)."
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(serializer
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(lambda (_ value)
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(if (maybe-value-set? value)
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value '()))))
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(prefix fstrim-))
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(define (serialize-fstrim-configuration config)
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(list-transduce (compose (base-transducer config) tconcatenate)
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rcons
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fstrim-configuration-fields))
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(define (fstrim-mcron-job config)
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(match-record config <fstrim-configuration> (package schedule)
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#~(job
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;; Note: The “if” below is to ensure that
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;; lists are ungexp'd correctly since @var{schedule}
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;; can be either a procedure, a string or a list.
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#$(if (list? schedule)
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#~'(#$@schedule)
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schedule)
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(lambda ()
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(system* #$(file-append package "/sbin/fstrim")
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#$@(serialize-fstrim-configuration config)))
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"fstrim")))
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(define fstrim-service-type
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(service-type
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(name 'fstrim)
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(extensions
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(list (service-extension mcron-service-type
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(compose list fstrim-mcron-job))))
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(description "Discard unused blocks from file systems.")
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(default-value (fstrim-configuration))))
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;;;
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;;; Kernel module loader.
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;;;
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(define kernel-module-loader-shepherd-service
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(match-lambda
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((and (? list? kernel-modules) ((? string?) ...))
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(shepherd-service
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(documentation "Load kernel modules.")
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(provision '(kernel-module-loader))
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(requirement '())
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(one-shot? #t)
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(modules `((srfi srfi-1)
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(srfi srfi-34)
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(srfi srfi-35)
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(rnrs io ports)
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,@%default-modules))
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(start
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#~(lambda _
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(cond
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((null? '#$kernel-modules) #t)
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((file-exists? "/proc/sys/kernel/modprobe")
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(let ((modprobe (call-with-input-file
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"/proc/sys/kernel/modprobe" get-line)))
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(guard (c ((message-condition? c)
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(format (current-error-port) "~a~%"
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(condition-message c))
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#f))
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(every (lambda (module)
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(invoke/quiet modprobe "--" module))
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'#$kernel-modules))))
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(else
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(format (current-error-port) "error: ~a~%"
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"Kernel is missing loadable module support.")
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#f))))))))
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(define kernel-module-loader-service-type
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(service-type
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(name 'kernel-module-loader)
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(description "Load kernel modules.")
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(extensions
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(list (service-extension shepherd-root-service-type
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(compose list kernel-module-loader-shepherd-service))))
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(compose concatenate)
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(extend append)
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(default-value '())))
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;;;
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;;; Cachefilesd, an FS-Cache daemon
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;;;
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(define (serialize-string variable-symbol value)
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#~(format #f "~a ~a~%" #$(symbol->string variable-symbol) #$value))
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(define-maybe string)
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(define (non-negative-integer? val)
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(and (exact-integer? val) (not (negative? val))))
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(define (serialize-non-negative-integer variable-symbol value)
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#~(format #f "~a ~d~%" #$(symbol->string variable-symbol) #$value))
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(define-maybe non-negative-integer)
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(define (make-option-serializer option-symbol)
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(lambda (variable-symbol text)
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(if (maybe-value-set? text)
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#~(format #f "~a ~a~%" #$(symbol->string option-symbol) #$text)
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"")))
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(define (make-percentage-threshold-serializer threshold-symbol)
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(lambda (variable-symbol percentage)
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(if (maybe-value-set? percentage)
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#~(format #f "~a ~a%~%" #$(symbol->string threshold-symbol) #$percentage)
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"")))
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(define-configuration cachefilesd-configuration
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(cachefilesd
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(file-like cachefilesd)
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"The cachefilesd package to use."
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(serializer empty-serializer))
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;; command-line options
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(debug-output?
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(boolean #f)
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"Print debugging output to stderr."
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(serializer empty-serializer))
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(use-syslog?
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(boolean #t)
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"Log to syslog facility instead of stdout."
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(serializer empty-serializer))
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;; culling is part of the configuration file
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;; despite the name of the command-line option
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(scan?
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(boolean #t)
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"Scan for cachable objects."
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(serializer empty-serializer))
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;; sole required field in the configuration file
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(cache-directory
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maybe-string
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"Location of the cache directory."
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(serializer (make-option-serializer 'dir)))
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(cache-name
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(maybe-string "CacheFiles")
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"Name of cache (keep unique)."
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(serializer (make-option-serializer 'tag)))
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(security-context
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maybe-string
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"SELinux security context."
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(serializer (make-option-serializer 'secctx)))
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;; percentage thresholds in the configuration file
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(pause-culling-for-block-percentage
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(maybe-non-negative-integer 7)
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"Pause culling when available blocks exceed this percentage."
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(serializer (make-percentage-threshold-serializer 'brun)))
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(pause-culling-for-file-percentage
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(maybe-non-negative-integer 7)
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"Pause culling when available files exceed this percentage."
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(serializer (make-percentage-threshold-serializer 'frun)))
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(resume-culling-for-block-percentage
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(maybe-non-negative-integer 5)
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"Start culling when available blocks drop below this percentage."
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(serializer (make-percentage-threshold-serializer 'bcull)))
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(resume-culling-for-file-percentage
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(maybe-non-negative-integer 5)
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"Start culling when available files drop below this percentage."
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(serializer (make-percentage-threshold-serializer 'fcull)))
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(pause-caching-for-block-percentage
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(maybe-non-negative-integer 1)
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"Pause further allocations when available blocks drop below this percentage."
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(serializer (make-percentage-threshold-serializer 'bstop)))
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(pause-caching-for-file-percentage
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(maybe-non-negative-integer 1)
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"Pause further allocations when available files drop below this percentage."
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(serializer (make-percentage-threshold-serializer 'fstop)))
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;; run time optimizations in the configuration file
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(log2-table-size
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(maybe-non-negative-integer 12)
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"Size of tables holding cullable objects in logarithm of base 2."
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(serializer (make-option-serializer 'culltable)))
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(cull?
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(boolean #t)
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"Create free space by culling (consumes system load)."
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(serializer
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(lambda (variable-symbol value)
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(if value "" "nocull\n"))))
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;; kernel module debugging in the configuration file
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(trace-function-entry-in-kernel-module?
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(boolean #f)
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"Trace function entry in the kernel module (for debugging)."
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(serializer empty-serializer))
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(trace-function-exit-in-kernel-module?
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(boolean #f)
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"Trace function exit in the kernel module (for debugging)."
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(serializer empty-serializer))
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(trace-internal-checkpoints-in-kernel-module?
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(boolean #f)
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"Trace internal checkpoints in the kernel module (for debugging)."
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(serializer empty-serializer)))
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(define (serialize-cachefilesd-configuration configuration)
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(mixed-text-file
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"cachefilesd.conf"
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(serialize-configuration configuration cachefilesd-configuration-fields)))
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(define (cachefilesd-shepherd-service config)
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"Return a list of <shepherd-service> for cachefilesd for CONFIG."
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(match-record
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config <cachefilesd-configuration> (cachefilesd
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debug-output?
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use-syslog?
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scan?
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cache-directory)
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(let ((configuration-file (serialize-cachefilesd-configuration config)))
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(shepherd-service
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(documentation "Run the cachefilesd daemon for FS-Cache.")
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(provision '(cachefilesd))
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(requirement (append '(file-systems)
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(if use-syslog? '(syslogd) '())))
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(start #~(begin
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(and=> #$(maybe-value cache-directory) mkdir-p)
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(make-forkexec-constructor
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`(#$(file-append cachefilesd "/sbin/cachefilesd")
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;; do not detach
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"-n"
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#$@(if debug-output? '("-d") '())
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#$@(if use-syslog? '() '("-s"))
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#$@(if scan? '() '("-N"))
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"-f" #$configuration-file))))
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||
(stop #~(make-kill-destructor))))))
|
||
|
||
(define cachefilesd-service-type
|
||
(service-type
|
||
(name 'cachefilesd)
|
||
(description
|
||
"Run the file system cache daemon @command{cachefilesd}, which relies on
|
||
the Linux @code{cachefiles} module.")
|
||
(extensions
|
||
(list (service-extension kernel-module-loader-service-type
|
||
(const '("cachefiles")))
|
||
(service-extension shepherd-root-service-type
|
||
(compose list cachefilesd-shepherd-service))))
|
||
(default-value (cachefilesd-configuration))))
|
||
|
||
|
||
;;;
|
||
;;; Reliability, Availability, and Serviceability (RAS) daemon
|
||
;;;
|
||
|
||
(define-record-type* <rasdaemon-configuration>
|
||
rasdaemon-configuration make-rasdaemon-configuration
|
||
rasdaemon-configuration?
|
||
(record? rasdaemon-configuration-record? (default #f)))
|
||
|
||
(define (rasdaemon-configuration->command-line-args config)
|
||
"Translate <rasdaemon-configuration> to its command line arguments
|
||
representation"
|
||
(let ((record? (rasdaemon-configuration-record? config)))
|
||
`(,(file-append rasdaemon "/sbin/rasdaemon")
|
||
"--foreground" ,@(if record? '("--record") '()))))
|
||
|
||
(define (rasdaemon-activation config)
|
||
(let ((record? (rasdaemon-configuration-record? config))
|
||
(rasdaemon-dir "/var/lib/rasdaemon"))
|
||
(with-imported-modules '((guix build utils))
|
||
#~(if #$record? (mkdir-p #$rasdaemon-dir)))))
|
||
|
||
(define (rasdaemon-shepherd-service config)
|
||
(shepherd-service
|
||
(documentation "Run rasdaemon")
|
||
(provision '(rasdaemon))
|
||
(requirement '(syslogd))
|
||
(start #~(make-forkexec-constructor
|
||
'#$(rasdaemon-configuration->command-line-args config)))
|
||
(stop #~(make-kill-destructor))))
|
||
|
||
(define rasdaemon-service-type
|
||
(service-type
|
||
(name 'rasdaemon)
|
||
(default-value (rasdaemon-configuration))
|
||
(extensions
|
||
(list (service-extension shepherd-root-service-type
|
||
(compose list rasdaemon-shepherd-service))
|
||
(service-extension activation-service-type rasdaemon-activation)))
|
||
(compose concatenate)
|
||
(description "Run @command{rasdaemon}, the RAS monitor")))
|
||
|
||
|
||
;;;
|
||
;;; Zram device
|
||
;;;
|
||
|
||
(define-record-type* <zram-device-configuration>
|
||
zram-device-configuration make-zram-device-configuration
|
||
zram-device-configuration?
|
||
(size zram-device-configuration-size
|
||
(default "1G")) ; string or integer
|
||
(compression-algorithm zram-device-configuration-compression-algorithm
|
||
(default 'lzo)) ; symbol
|
||
(memory-limit zram-device-configuration-memory-limit
|
||
(default 0)) ; string or integer
|
||
(priority zram-device-configuration-priority
|
||
(default #f) ; integer | #f
|
||
(delayed) ; to avoid printing the deprecation
|
||
; warning multiple times
|
||
(sanitize warn-zram-priority-change)))
|
||
|
||
(define-with-syntax-properties
|
||
(warn-zram-priority-change (priority properties))
|
||
(if (eqv? priority -1)
|
||
(begin
|
||
(warning (source-properties->location properties)
|
||
(G_ "using -1 for zram priority is deprecated~%"))
|
||
(display-hint (G_ "Use #f or leave as default instead (@pxref{Linux \
|
||
Services})."))
|
||
#f)
|
||
priority))
|
||
|
||
(define (zram-device-configuration->udev-string config)
|
||
"Translate a <zram-device-configuration> into a string which can be
|
||
placed in a udev rules file."
|
||
(match config
|
||
(($ <zram-device-configuration> size compression-algorithm memory-limit priority)
|
||
(string-append
|
||
"KERNEL==\"zram0\", "
|
||
"ATTR{comp_algorithm}=\"" (symbol->string compression-algorithm) "\" "
|
||
(if (not (or (equal? "0" size)
|
||
(equal? 0 size)))
|
||
(string-append "ATTR{disksize}=\"" (if (number? size)
|
||
(number->string size)
|
||
size)
|
||
"\" ")
|
||
"")
|
||
(if (not (or (equal? "0" memory-limit)
|
||
(equal? 0 memory-limit)))
|
||
(string-append "ATTR{mem_limit}=\"" (if (number? memory-limit)
|
||
(number->string memory-limit)
|
||
memory-limit)
|
||
"\" ")
|
||
"")
|
||
"RUN+=\"/run/current-system/profile/sbin/mkswap /dev/zram0\" "
|
||
"RUN+=\"/run/current-system/profile/sbin/swapon "
|
||
;; TODO: Revert to simply use 'priority' after removing the deprecation
|
||
;; warning and the delayed property of the field.
|
||
(let ((priority* (force priority)))
|
||
(if priority*
|
||
(format #f "--priority ~a " priority*)
|
||
""))
|
||
"/dev/zram0\"\n"))))
|
||
|
||
(define %zram-device-config
|
||
`("modprobe.d/zram.conf"
|
||
,(plain-file "zram.conf"
|
||
"options zram num_devices=1")))
|
||
|
||
(define (zram-device-udev-rule config)
|
||
(file->udev-rule "99-zram.rules"
|
||
(plain-file "99-zram.rules"
|
||
(zram-device-configuration->udev-string config))))
|
||
|
||
(define zram-device-service-type
|
||
(service-type
|
||
(name 'zram)
|
||
(default-value (zram-device-configuration))
|
||
(extensions
|
||
(list (service-extension kernel-module-loader-service-type
|
||
(const (list "zram")))
|
||
(service-extension etc-service-type
|
||
(const (list %zram-device-config)))
|
||
(service-extension udev-service-type
|
||
(compose list zram-device-udev-rule))))
|
||
(description "Creates a zram swap device.")))
|