systemd.kill(5)
NAME
systemd.kill - Process killing procedure configuration
SYNOPSIS
service.service, socket.socket, mount.mount, swap.swap, scope.scope
DESCRIPTION
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.
OPTIONS
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.
Note that, right after sending the signal specified in this
setting, systemd will always send SIGCONT, to ensure that even
suspended tasks can be terminated cleanly.
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".
SEE ALSO
systemd(1), systemctl(1), journalctl(8), systemd.unit(5), systemd.service(5), systemd.socket(5), systemd.swap(5), systemd.mount(5), systemd.exec(5), systemd.directives(7), kill(2), signal(7)
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