# 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