node_exporter.upstart.erb
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node_exporter.upstart.erb
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	# Prometheus Node Exporter (Upstart unit)
	description "Prometheus exporter for machine metrics, written in Go with pluggable metric collectors"
	start on runlevel [2345]
	stop on runlevel [06]

	env PROMETHEUS=<%= scope.lookupvar('prometheus::node_exporter::bin_dir') %>/node_exporter
	env COLLECTORS=<%= scope.lookupvar('prometheus::node_exporter::collectors').join(',') %>
	env USER=<%= scope.lookupvar('prometheus::node_exporter::user') %>
	env GROUP=<%= scope.lookupvar('prometheus::node_exporter::group') %>
	env DEFAULTS=/etc/default/node_exporter
	env RUNDIR=/var/run/node_exporter
	env PID_FILE=/var/run/node_exporter/node_exporter.pid
	pre-start script
	[ -e $DEFAULTS ] && . $DEFAULTS

	mkdir -p $RUNDIR \|\| true
	chmod 0750 $RUNDIR \|\| true
	chown $USER:$GROUP $RUNDIR \|\| true
	end script

	script
	# read settings like GOMAXPROCS from "/etc/default/node_exporter", if available.
	[ -e $DEFAULTS ] && . $DEFAULTS

	export GOMAXPROCS=${GOMAXPROCS:-2}
	exec start-stop-daemon -c $USER -g $GROUP -p $PID_FILE -x $PROMETHEUS -S -- -collectors.enabled=$COLLECTORS <%= scope.lookupvar('prometheus::node_exporter::extra_options') %>
	end script

	respawn
	respawn limit 10 10
	kill timeout 10