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#!/bin/sh
### BEGIN INIT INFO
# Provides: kea-dhcp4-server
# Required-Start: $local_fs $network $remote_fs $syslog
# Required-Stop: $local_fs $network $remote_fs $syslog
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Kea DHCP IPv4 Server
# Description: Kea is an IPv4 and IPv6 DHCP server developed by Internet
# Systems Consortium providing a very high-performance with
# PostgreSQL, MySQL and memfile backends.
### END INIT INFO
# Author: Adam Majer <adamm@zombino.com>
# Do NOT "set -e"
# PATH should only include /usr/* if it runs after the mountnfs.sh script
PATH=/sbin:/usr/sbin:/bin:/usr/bin
DESC="kea-dhcp4"
NAME=kea-dhcp4-server
DAEMON=/usr/sbin/kea-dhcp4
DAEMON_ARGS="-c /etc/kea/kea-dhcp4.conf"
DAEMONUSER=_kea
PIDFILE=/run/kea/kea-dhcp4.kea-dhcp4.pid # depends on config-filename: https://kea.readthedocs.io/en/latest/arm/dhcp4-srv.html
SCRIPTNAME=/etc/init.d/$NAME
KEA_PIDFILE_DIR=/run/kea
KEA_LOCKFILE_DIR=/run/lock/kea
# Exit if the package is not installed
[ -x "$DAEMON" ] || exit 0
# Read configuration variable file if it is present
[ -r /etc/default/$NAME ] && . /etc/default/$NAME
# Load the VERBOSE setting and other rcS variables
. /lib/init/vars.sh
# Define LSB log_* functions.
# Depend on lsb-base (>= 3.2-14) to ensure that this file is present
# and status_of_proc is working.
. /lib/lsb/init-functions
create_lockfile_dir()
{
if [ ! -d "$KEA_LOCKFILE_DIR" ]; then
mkdir -m 0750 -p "$KEA_LOCKFILE_DIR"
chown "$DAEMONUSER:" "$KEA_LOCKFILE_DIR"
fi
}
create_pidfile_dir()
{
if [ ! -d "$KEA_PIDFILE_DIR" ]; then
mkdir -m 0750 -p "$KEA_PIDFILE_DIR"
chown "$DAEMONUSER:" "$KEA_PIDFILE_DIR"
fi
}
setcap_binary()
{
setcap "cap_net_bind_service,cap_net_raw=+ep" $DAEMON
}
#
# Function that starts the daemon/service
#
do_start()
{
create_lockfile_dir
create_pidfile_dir
setcap_binary
export KEA_LOCKFILE_DIR
# Return
# 0 if daemon has been started
# 1 if daemon was already running
# 2 if daemon could not be started
start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON --test > /dev/null \
|| return 1
start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON -b -c $DAEMONUSER -- \
$DAEMON_ARGS \
|| return 2
}
#
# Function that stops the daemon/service
#
do_stop()
{
# Return
# 0 if daemon has been stopped
# 1 if daemon was already stopped
# 2 if daemon could not be stopped
# other if a failure occurred
start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 --pidfile $PIDFILE --exec $DAEMON --user $DAEMONUSER
RETVAL="$?"
[ "$RETVAL" = 2 ] && return 2
# Wait for children to finish too if this is a daemon that forks
# and if the daemon is only ever run from this initscript.
# If the above conditions are not satisfied then add some other code
# that waits for the process to drop all resources that could be
# needed by services started subsequently. A last resort is to
# sleep for some time.
start-stop-daemon --stop --quiet --oknodo --retry=0/30/KILL/5 --exec $DAEMON --user $DAEMONUSER
[ "$?" = 2 ] && return 2
# Many daemons don't delete their pidfiles when they exit.
rm -f $PIDFILE
return "$RETVAL"
}
#
# Function that sends a SIGHUP to the daemon/service
#
do_reload() {
start-stop-daemon --stop --signal 1 --quiet --pidfile $PIDFILE --exec $DAEMON --user $DAEMONUSER
return 0
}
case "$1" in
start)
[ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC" "$NAME"
do_start
case "$?" in
0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
esac
;;
stop)
[ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
do_stop
case "$?" in
0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
esac
;;
status)
status_of_proc "$DAEMON" "$NAME" && exit 0 || exit $?
;;
reload|force-reload)
log_daemon_msg "Reloading $DESC" "$NAME"
do_reload
log_end_msg $?
;;
restart)
log_daemon_msg "Restarting $DESC" "$NAME"
do_stop
case "$?" in
0|1)
do_start
case "$?" in
0) log_end_msg 0 ;;
1) log_end_msg 1 ;; # Old process is still running
*) log_end_msg 1 ;; # Failed to start
esac
;;
*)
# Failed to stop
log_end_msg 1
;;
esac
;;
*)
#echo "Usage: $SCRIPTNAME {start|stop|restart|reload|force-reload}" >&2
echo "Usage: $SCRIPTNAME {start|stop|status|restart|force-reload}" >&2
exit 3
;;
esac
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