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authorMaxim Cournoyer <maxim.cournoyer@gmail.com>2020-01-06 01:36:00 -0500
committerMaxim Cournoyer <maxim.cournoyer@gmail.com>2020-01-31 23:37:13 -0500
commitd3e439e355284f136ff13eb3e6fffb4661552f3b (patch)
tree624e123167079a142ddacb1c3d7b00e73f7f3490 /gnu/services/linux.scm
parent76f5428bc6b4b4d944be1c16f50d6e558416635f (diff)
downloadguix-d3e439e355284f136ff13eb3e6fffb4661552f3b.tar
guix-d3e439e355284f136ff13eb3e6fffb4661552f3b.tar.gz
gnu: Add earlyoom-service-type.
* gnu/services/linux.scm: New file. * tests/services/linux.scm: Add test. * Makefile.am (SCM_TESTS): Register test. * doc/guix.texi (Linux Services): Add a new section and document the new service and its configuration.
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+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2020 Maxim Cournoyer <maxim.cournoyer@gmail.com>
+;;;
+;;; 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 shepherd)
+ #:use-module (gnu packages linux)
+ #:use-module (srfi srfi-1)
+ #:use-module (srfi srfi-26)
+ #: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))
+
+
+;;;
+;;; 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.")))