259 lines
9.9 KiB
Scheme
259 lines
9.9 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
|
||
;;; Copyright © 2020 Maxim Cournoyer <maxim.cournoyer@gmail.com>
|
||
;;; Copyright © 2020 Brice Waegeneire <brice@waegenei.re>
|
||
;;; Copyright © 2020 Efraim Flashner <efraim@flashner.co.il>
|
||
;;;
|
||
;;; This file is part of GNU Guix.
|
||
;;;
|
||
;;; GNU Guix is free software; you can redistribute it and/or modify it
|
||
;;; under the terms of the GNU General Public License as published by
|
||
;;; the Free Software Foundation; either version 3 of the License, or (at
|
||
;;; your option) any later version.
|
||
;;;
|
||
;;; GNU Guix is distributed in the hope that it will be useful, but
|
||
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
;;; GNU General Public License for more details.
|
||
;;;
|
||
;;; You should have received a copy of the GNU General Public License
|
||
;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
|
||
|
||
(define-module (gnu services linux)
|
||
#:use-module (guix gexp)
|
||
#:use-module (guix records)
|
||
#:use-module (guix modules)
|
||
#:use-module (gnu services)
|
||
#:use-module (gnu services base)
|
||
#:use-module (gnu services shepherd)
|
||
#:use-module (gnu packages linux)
|
||
#:use-module (srfi srfi-1)
|
||
#:use-module (srfi srfi-26)
|
||
#:use-module (srfi srfi-34)
|
||
#:use-module (srfi srfi-35)
|
||
#:use-module (ice-9 match)
|
||
#:export (earlyoom-configuration
|
||
earlyoom-configuration?
|
||
earlyoom-configuration-earlyoom
|
||
earlyoom-configuration-minimum-available-memory
|
||
earlyoom-configuration-minimum-free-swap
|
||
earlyoom-configuration-prefer-regexp
|
||
earlyoom-configuration-avoid-regexp
|
||
earlyoom-configuration-memory-report-interval
|
||
earlyoom-configuration-ignore-positive-oom-score-adj?
|
||
earlyoom-configuration-show-debug-messages?
|
||
earlyoom-configuration-send-notification-command
|
||
earlyoom-service-type
|
||
|
||
kernel-module-loader-service-type
|
||
|
||
zram-device-configuration
|
||
zram-device-configuration?
|
||
zram-device-configuration-size
|
||
zram-device-configuration-compression-algorithm
|
||
zram-device-configuration-memory-limit
|
||
zram-device-configuration-priority
|
||
zram-device-service-type))
|
||
|
||
|
||
;;;
|
||
;;; Early OOM daemon.
|
||
;;;
|
||
|
||
(define-record-type* <earlyoom-configuration>
|
||
earlyoom-configuration make-earlyoom-configuration
|
||
earlyoom-configuration?
|
||
(earlyoom earlyoom-configuration-earlyoom
|
||
(default earlyoom))
|
||
(minimum-available-memory earlyoom-configuration-minimum-available-memory
|
||
(default 10)) ; in percent
|
||
(minimum-free-swap earlyoom-configuration-minimum-free-swap
|
||
(default 10)) ; in percent
|
||
(prefer-regexp earlyoom-configuration-prefer-regexp ; <string>
|
||
(default #f))
|
||
(avoid-regexp earlyoom-configuration-avoid-regexp ; <string>
|
||
(default #f))
|
||
(memory-report-interval earlyoom-configuration-memory-report-interval
|
||
(default 0)) ; in seconds; 0 means disabled
|
||
(ignore-positive-oom-score-adj?
|
||
earlyoom-configuration-ignore-positive-oom-score-adj? (default #f))
|
||
(run-with-higher-priority? earlyoom-configuration-run-with-higher-priority?
|
||
(default #f))
|
||
(show-debug-messages? earlyoom-configuration-show-debug-messages?
|
||
(default #f))
|
||
(send-notification-command
|
||
earlyoom-configuration-send-notification-command ; <string>
|
||
(default #f)))
|
||
|
||
(define (earlyoom-configuration->command-line-args config)
|
||
"Translate a <earlyoom-configuration> object to its command line arguments
|
||
representation."
|
||
(match config
|
||
(($ <earlyoom-configuration> earlyoom minimum-available-memory
|
||
minimum-free-swap prefer-regexp avoid-regexp
|
||
memory-report-interval
|
||
ignore-positive-oom-score-adj?
|
||
run-with-higher-priority? show-debug-messages?
|
||
send-notification-command)
|
||
`(,(file-append earlyoom "/bin/earlyoom")
|
||
,@(if minimum-available-memory
|
||
(list "-m" (format #f "~s" minimum-available-memory))
|
||
'())
|
||
,@(if minimum-free-swap
|
||
(list "-s" (format #f "~s" minimum-free-swap))
|
||
'())
|
||
,@(if prefer-regexp
|
||
(list "--prefer" prefer-regexp)
|
||
'())
|
||
,@(if avoid-regexp
|
||
(list "--avoid" avoid-regexp)
|
||
'())
|
||
"-r" ,(format #f "~s" memory-report-interval)
|
||
,@(if ignore-positive-oom-score-adj?
|
||
(list "-i")
|
||
'())
|
||
,@(if run-with-higher-priority?
|
||
(list "-p")
|
||
'())
|
||
,@(if show-debug-messages?
|
||
(list "-d")
|
||
'())
|
||
,@(if send-notification-command
|
||
(list "-N" send-notification-command)
|
||
'())))))
|
||
|
||
(define (earlyoom-shepherd-service config)
|
||
(shepherd-service
|
||
(documentation "Run the Early OOM daemon.")
|
||
(provision '(earlyoom))
|
||
(start #~(make-forkexec-constructor
|
||
'#$(earlyoom-configuration->command-line-args config)
|
||
#:log-file "/var/log/earlyoom.log"))
|
||
(stop #~(make-kill-destructor))))
|
||
|
||
(define earlyoom-service-type
|
||
(service-type
|
||
(name 'earlyoom)
|
||
(default-value (earlyoom-configuration))
|
||
(extensions
|
||
(list (service-extension shepherd-root-service-type
|
||
(compose list earlyoom-shepherd-service))))
|
||
(description "Run @command{earlyoom}, the Early OOM daemon.")))
|
||
|
||
|
||
;;;
|
||
;;; Kernel module loader.
|
||
;;;
|
||
|
||
(define kernel-module-loader-shepherd-service
|
||
(match-lambda
|
||
((and (? list? kernel-modules) ((? string?) ...))
|
||
(list
|
||
(shepherd-service
|
||
(documentation "Load kernel modules.")
|
||
(provision '(kernel-module-loader))
|
||
(requirement '(file-systems))
|
||
(one-shot? #t)
|
||
(modules `((srfi srfi-1)
|
||
(srfi srfi-34)
|
||
(srfi srfi-35)
|
||
(rnrs io ports)
|
||
,@%default-modules))
|
||
(start
|
||
#~(lambda _
|
||
(cond
|
||
((null? '#$kernel-modules) #t)
|
||
((file-exists? "/proc/sys/kernel/modprobe")
|
||
(let ((modprobe (call-with-input-file
|
||
"/proc/sys/kernel/modprobe" get-line)))
|
||
(guard (c ((message-condition? c)
|
||
(format (current-error-port) "~a~%"
|
||
(condition-message c))
|
||
#f))
|
||
(every (lambda (module)
|
||
(invoke/quiet modprobe "--" module))
|
||
'#$kernel-modules))))
|
||
(else
|
||
(format (current-error-port) "error: ~a~%"
|
||
"Kernel is missing loadable module support.")
|
||
#f)))))))))
|
||
|
||
(define kernel-module-loader-service-type
|
||
(service-type
|
||
(name 'kernel-module-loader)
|
||
(description "Load kernel modules.")
|
||
(extensions
|
||
(list (service-extension shepherd-root-service-type
|
||
kernel-module-loader-shepherd-service)))
|
||
(compose concatenate)
|
||
(extend append)
|
||
(default-value '())))
|
||
|
||
|
||
;;;
|
||
;;; Kernel module loader.
|
||
;;;
|
||
|
||
(define-record-type* <zram-device-configuration>
|
||
zram-device-configuration make-zram-device-configuration
|
||
zram-device-configuration?
|
||
(size zram-device-configuration-size
|
||
(default "1G")) ; string or integer
|
||
(compression-algorithm zram-device-configuration-compression-algorithm
|
||
(default 'lzo)) ; symbol
|
||
(memory-limit zram-device-configuration-memory-limit
|
||
(default 0)) ; string or integer
|
||
(priority zram-device-configuration-priority
|
||
(default -1))) ; integer
|
||
|
||
(define (zram-device-configuration->udev-string config)
|
||
"Translate a <zram-device-configuration> into a string which can be
|
||
placed in a udev rules file."
|
||
(match config
|
||
(($ <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 "
|
||
(if (not (equal? -1 priority))
|
||
(string-append "--priority " (number->string 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.")))
|