#!/sbin/openrc-run

extra_commands="failover"

depend() {
	need net
}

chkconfig() {
	[ -z "${ROLES}" ] && { eerror "No role defined !"; return 1;}
	if [ "${FAILOVER}" -eq "1" ]; then
		[ -z "${FAILOVER_IP}" ] && { eerror "No failover ip defined !"; return 1;}
		[ -z "${IFACE}" ] && { eerror "No interface defined !"; return 1;}
		[ "${AUTORESTORE}" -ne "1" ] && { eerror "Autorestore must be enabled !"; return 1;}
	fi
	for ROLE in ${ROLES}; do
		if [ ! -f /etc/mfs/${ROLE}.cfg ]; then
			eerror "Missing configuration file for role ${ROLE} !"
			return 1
		fi
	done
	return 0
}

autorestore() {
	einfo "AUTORESTORE set, trying to restore metadata files"
	mfsmetarestore -a &>/dev/null
	return $?
}

start_role() {
	local ROLE=$1
	local RETURN=0

	ebegin "${ROLE}"
	start-stop-daemon -q --start --exec "${ROLE}" -- start >/dev/null
	RETURN=$?
	eend ${RETURN}

	return ${RETURN}
}

start_roles() {
	local RETURN=0

	eindent
	for ROLE in ${ROLES}; do

		start_role ${ROLE} || RETURN=$?
		eend ${RETURN}

		if [ "${RETURN}" != "0" ] && [ "${ROLE}" == "mfsmaster" ] && [ ${AUTORESTORE} -eq 1 ]; then
			eindent
			autorestore && start_role ${ROLE}
			RETURN=$?
			eoutdent
		fi

		[ "${RETURN}" != "0" ] && break
	done
	eoutdent

	return ${RETURN}
}

start() {
	ebegin "Starting mfs node"
	chkconfig && start_roles
	eend $?
}

stop() {
	local RETURN=0

	ebegin "Stopping mfs node"
	eindent
	local REVERSE=$(echo ${ROLES} | tac -s' ')
	for ROLE in ${REVERSE}; do
		ebegin "${ROLE}"
		start-stop-daemon -q --stop -n ${ROLE} || RETURN=$?
		eend ${RETURN}
	done
	eoutdent

	eend ${RETURN}
}

failover() {
		ebegin "Starting master migration"
		if ! ip addr | grep ${FAILOVER_IP} > /dev/null
		then
		ip addr add ${FAILOVER_IP}'/32' dev ${IFACE}
		fi
		start-stop-daemon -q --stop -n mfsmetalogger || RETURN=$?
		autorestore && start_role mfsmaster
		eend $?
}