systemd.kill — Process killing procedure configuration
service.servicesocket.socketmount.mountswap.swapscope.scope
Unit configuration files for services, sockets, mount points, swap devices and scopes share a subset of configuration options which define the killing procedure of processes belonging to the unit.
This man page lists the configuration options shared by these five unit types. See systemd.unit(5) for the common options shared by all unit configuration files, and systemd.service(5), systemd.socket(5), systemd.swap(5), systemd.mount(5) and systemd.scope(5) for more information on the configuration file options specific to each unit type.
The kill procedure configuration options are configured in the [Service], [Socket], [Mount] or [Swap] section, depending on the unit type.
KillMode=¶Specifies how
processes of this unit shall be
killed. One of
control-group,
process,
mixed,
none.
If set to
control-group, all
remaining processes in the control
group of this unit will be killed on
unit stop (for services: after the
stop command is executed, as
configured with
ExecStop=). If set
to process, only the
main process itself is killed. If set
to mixed, the
SIGTERM signal
(see below) is sent to the main
process while the subsequent
SIGKILL signal
(see below) is sent to all remaining
processes of the unit's control
group. If set to
none, no process is
killed. In this case, only the stop
command will be executed on unit stop,
but no process be killed
otherwise. Processes remaining alive
after stop are left in their control
group and the control group continues
to exist after stop unless it is
empty.
Processes will first be
terminated via
SIGTERM (unless
the signal to send is changed via
KillSignal=). Optionally,
this is immediately followed by a
SIGHUP (if
enabled with
SendSIGHUP=). If
then, after a delay (configured via the
TimeoutStopSec= option),
processes still remain, the
termination request is repeated with
the SIGKILL
signal (unless this is disabled via
the SendSIGKILL=
option). See
kill(2)
for more
information.
Defaults to
control-group.
KillSignal=¶Specifies which signal
to use when killing a service. This
controls the signal that is sent as
first step of shutting down a unit
(see above), and is usually followed
by SIGKILL (see
above and below). For a list of valid
signals, see
signal(7). Defaults
to SIGTERM.
SendSIGHUP=¶Specifies whether to
send SIGHUP to
remaining processes immediately after
sending the signal configured with
KillSignal=. This
is useful to indicate to shells and
shell-like programs that their
connection has been severed. Takes a
boolean value. Defaults to "no".
SendSIGKILL=¶Specifies whether to
send SIGKILL to remaining processes
after a timeout, if the normal
shutdown procedure left processes of
the service around. Takes a boolean
value. Defaults to "yes".