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#!/sbin/openrc-run

name="Elasticsearch"
description="Elasticsearch Server"

ES_INSTANCE=${SVCNAME#*.}
PID_DIR=${PID_DIR:="/run/elasticsearch"}

if [ -n "${ES_INSTANCE}" ] && [ ${SVCNAME} != "elasticsearch" ]; then
	PIDFILE="${PID_DIR}/elasticsearch.${ES_INSTANCE}.pid"
	ES_BASE_PATH="/var/lib/elasticsearch/${ES_INSTANCE}"
	CONF_DIR="/etc/elasticsearch/${ES_INSTANCE}"
	LOG_DIR="/var/log/elasticsearch/${ES_INSTANCE}"
else
	PIDFILE="${PID_DIR}/elasticsearch.pid"
	ES_BASE_PATH="/var/lib/elasticsearch/_default"
	CONF_DIR="/etc/elasticsearch"
	LOG_DIR="/var/log/elasticsearch/_default"
fi

ES_HOME=${ES_HOME:="/usr/share/elasticsearch"}
ES_USER=${ES_USER:="elasticsearch"}
ES_GROUP=${ES_GROUP:="elasticsearch"}
ES_GC_LOG_FILE=${ES_GC_LOG_FILE:="${LOG_DIR}/gc.log"}
MAX_OPEN_FILES=${MAX_OPEN_FILES:=65535}
MAX_MAP_COUNT=${MAX_MAP_COUNT:=262144}

DATA_DIR="${ES_BASE_PATH}/data"

if [ -f "${CONF_DIR}/elasticsearch.in.sh" ]; then
    ES_INCLUDE="${CONF_DIR}/elasticsearch.in.sh"
fi

export ES_INCLUDE
export JAVA_OPTS
export ES_JAVA_OPTS
export ES_HEAP_SIZE
export ES_HEAP_NEWSIZE
export ES_DIRECT_SIZE
export ES_GC_LOG_FILE
export ES_STARTUP_SLEEP_TIME

server_command="/usr/share/elasticsearch/bin/elasticsearch"
server_args="-d -p ${PIDFILE} --default.path.home=${ES_HOME} --default.path.logs=${LOG_DIR} --default.path.data=${DATA_DIR} --default.path.conf=${CONF_DIR}"

depend() {
	use net
}

start() {
	local conf
	local conf_file
	for conf in elasticsearch.yml logging.yml; do
		conf_file="${CONF_DIR}/${conf}"
		if [ ! -f "${conf_file}" ]; then
			eerror "${conf_file} must be copied into place"
			return 1
		fi
	done

	if [ -n "${MAX_LOCKED_MEMORY}" -a -z "${ES_HEAP_SIZE}" ]; then
		eerror "MAX_LOCKED_MEMORY is set - ES_HEAP_SIZE must also be set"
		return 1
	fi

	if [ -n "${MAX_MAP_COUNT}" -a -f /proc/sys/vm/max_map_count ]; then
		sysctl -q -w vm.max_map_count=${MAX_MAP_COUNT}
	fi

	ebegin "Starting ${SVCNAME}"

	if [ -n "${MAX_LOCKED_MEMORY}" ]; then
		rc_ulimit="${rc_ulimit} -l ${MAX_LOCKED_MEMORY}"
	fi

	if [ -n "${MAX_OPEN_FILES}" ]; then
		rc_ulimit="${rc_ulimit} -n ${MAX_OPEN_FILES}"
	fi

	checkpath -d -o "${ES_USER}:${ES_GROUP}" -m750 "/var/lib/elasticsearch"
	checkpath -d -o "${ES_USER}:${ES_GROUP}" -m750 "/var/log/elasticsearch"
	checkpath -d -o "${ES_USER}:${ES_GROUP}" -m750 "${PID_DIR}"
	checkpath -d -o "${ES_USER}:${ES_GROUP}" -m750 "${ES_BASE_PATH}"
	checkpath -d -o "${ES_USER}:${ES_GROUP}" -m750 "${LOG_DIR}"

	start-stop-daemon --start \
		--background \
		--chdir "${ES_HOME}" \
		--user="${ES_USER}" \
		--pidfile="${PIDFILE}" \
		--exec ${server_command} -- ${server_args}
	eend $?
}

stop() {
	ebegin "Stopping ${SVCNAME}"
	start-stop-daemon --stop \
		--pidfile=${PIDFILE} \
		--user="${ES_USER}" \
		--retry=TERM/20
	eend $?
}