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#!/sbin/openrc-run
# Copyright 2016-2018 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

description="Prometheus exporter for LVM metrics"

EXPORTER_FLAGS=${EXPORTER_FLAGS:-""}
#EXPORTER_USER=${EXPORTER_USER:-"prometheus-lvm-exporter"}
#EXPORTER_GROUP=${EXPORTER_GROUP:-"prometheus-lvm-exporter"}
EXPORTER_PIDFILE=${EXPORTER_PIDFILE:-"/run/${RC_SVCNAME}.pid"}
EXPORTER_SSDARGS=${EXPORTER_SSDARGS:-"--wait 1000"}
EXPORTER_TERMTIMEOUT=${EXPORTER_TERMTIMEOUT:-"TERM/60/KILL/5"}

command="/usr/bin/prometheus-lvm-exporter"
command_args="${EXPORTER_FLAGS}"
command_background="true"
start_stop_daemon_args="${EXPORTER_SSDARGS}"
start_stop_daemon_args="${start_stop_daemon_args} ${EXPORTER_USER:+--user }${EXPORTER_USER}"
start_stop_daemon_args="${start_stop_daemon_args} ${EXPORTER_GROUP:+--group }${EXPORTER_GROUP}"

getconfig() {
	local key="$1"
	local value_default="$2"
	local value=

	if service_started; then
		value="$(service_get_value "${key}")"
	fi

	if [ -z "${value}" ]; then
		# Value not explicitly set
		echo "${value_default}"
	else
		echo "${value}"
	fi

	return 0
}

pidfile="$(getconfig pidfile ${EXPORTER_PIDFILE})"
retry="$(getconfig retry ${EXPORTER_TERMTIMEOUT})"

depend() {
	after net lvm lvm-monitoring
}

start_post() {
	service_set_value retry "${EXPORTER_TERMTIMEOUT}"
}