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#!/sbin/openrc-run
# Copyright 1999-2016 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

LS_USER=${LS_USER:-logstash}
LS_GROUP=${LS_GROUP:-$LS_USER}
LS_LOG_FILE=${LS_LOG_FILE:-/var/log/logstash/logstash.log}
LS_CONF_DIR=${LS_CONF_DIR:-/etc/logstash/conf.d}
LS_HOME=${LS_HOME:-/var/lib/logstash}
LS_HEAP_SIZE=${LS_HEAP_SIZE:-500m}
LS_NICE=${LS_NICE:-19}
LS_JAVA_OPTS=${LS_JAVA_OPTS:-"-Djava.io.tmpdir=${LS_HOME}"}
LS_USE_GC_LOGGING=${LS_USE_GC_LOGGING:-false}
LS_OPEN_FILES=${LS_OPEN_FILES:-16384}
KILL_ON_STOP_TIMEOUT=${KILL_ON_STOP_TIMEOUT:-0}

command="/opt/logstash/bin/logstash"
command_args="--path.config ${LS_CONF_DIR} --path.logs ${LS_LOG_FILE} ${LS_OPTS}"
command_background="true"
pidfile=${LS_PIDFILE:-"/run/logstash/logstash.pid"}

start_stop_daemon_args="--user ${LS_USER}:${LS_GROUP} \
	--chdir ${LS_HOME}
	--nicelevel ${LS_NICE}
	--env LS_HEAP_SIZE=${LS_HEAP_SIZE}
	--env LS_JAVA_OPTS=${LS_JAVA_OPTS}
	--env LS_USE_GC_LOGGING=${LS_USE_GC_LOGGING}"

extra_commands="checkconfig"
extra_started_commands="reload"

checkconfig() {
	if [ ! -f ${LS_CONF_DIR}/* ]; then
		eerror "Please put your configuration in ${LS_CONF_DIR}"
		exit 1
	fi

	ebegin "Checking your configuration"
	${command} ${command_args} --config.test_and_exit
	eend $? "Configuration error. Please fix your configuration files."
}

reload() {
	checkconfig || return 1
	ebegin "Reloading configuration"
	start-stop-daemon --signal HUP --pidfile "${pidfile}"
	eend $?
}

start_pre() {
	checkconfig || return 1

	rc_ulimit="-n ${LS_OPEN_FILES}"

	checkpath -d -o "${LS_USER}":"${LS_GROUP}" -m750 "$(dirname "${pidfile}")"
	checkpath -d -o "${LS_USER}":"${LS_GROUP}" -m750 "$(dirname "${LS_LOG_FILE}")"
	checkpath -f -o "${LS_USER}":"${LS_GROUP}" -m640 "${LS_LOG_FILE}"
}

stop() {
	ebegin "Stopping logstash"
	if [ "${KILL_ON_STOP_TIMEOUT}" == "1" ]; then
		start-stop-daemon --stop \
			--pidfile=${pidfile} \
			--retry=TERM/5/KILL/5
	else
		start-stop-daemon --stop \
			--pidfile=${pidfile}
	fi
}