units/systemd-oomd.service.in

   1 #  SPDX-License-Identifier: LGPL-2.1-or-later
   2 #
   3 #  This file is part of systemd.
   4 #
   5 #  systemd is free software; you can redistribute it and/or modify it
   6 #  under the terms of the GNU Lesser General Public License as published by
   7 #  the Free Software Foundation; either version 2.1 of the License, or
   8 #  (at your option) any later version.
   9
  10 [Unit]
  11 Description=Userspace Out-Of-Memory (OOM) Killer
  12 Documentation=man:systemd-oomd.service(8)
  13 Documentation=man:org.freedesktop.oom1(5)
  14 DefaultDependencies=no
  15 Before=multi-user.target shutdown.target
  16 Conflicts=shutdown.target
  17 ConditionControlGroupController=v2
  18 ConditionControlGroupController=memory
  19 ConditionPathExists=/proc/pressure/cpu
  20 ConditionPathExists=/proc/pressure/io
  21 ConditionPathExists=/proc/pressure/memory
  22 Requires=systemd-oomd.socket
  23 After=systemd-oomd.socket
  24
  25 [Service]
  26 AmbientCapabilities=CAP_KILL CAP_DAC_OVERRIDE
  27 BusName=org.freedesktop.oom1
  28 CapabilityBoundingSet=CAP_KILL CAP_DAC_OVERRIDE
  29 ExecStart={{ROOTLIBEXECDIR}}/systemd-oomd
  30 IPAddressDeny=any
  31 LockPersonality=yes
  32 MemoryDenyWriteExecute=yes
  33 # Reserve some minimum amount of memory so that systemd-oomd can continue to
  34 # run in resource starved scenarios.
  35 MemoryMin=64M
  36 MemoryLow=64M
  37 NoNewPrivileges=yes
  38 OOMScoreAdjust=-900
  39 PrivateDevices=yes
  40 PrivateTmp=yes
  41 ProtectClock=yes
  42 ProtectHome=yes
  43 ProtectHostname=yes
  44 ProtectKernelLogs=yes
  45 ProtectKernelModules=yes
  46 ProtectKernelTunables=yes
  47 ProtectSystem=strict
  48 Restart=on-failure
  49 RestrictAddressFamilies=AF_UNIX
  50 RestrictNamespaces=yes
  51 RestrictRealtime=yes
  52 RestrictSUIDSGID=yes
  53 SystemCallArchitectures=native
  54 SystemCallErrorNumber=EPERM
  55 SystemCallFilter=@system-service
  56 Type=notify
  57 User=systemd-oom
  58 {{SERVICE_WATCHDOG}}
  59
  60 [Install]
  61 WantedBy=multi-user.target
  62 Alias=dbus-org.freedesktop.oom1.service