Support SysVinit (amzn1)

install.bash

@@ -65,6 +65,13 @@ scrape_configs:
         target_label: role
 _EOD_
 
+
+#
+# Install to system
+#
+
+if hash systemctl; then
+# systemd
 cat > /usr/lib/systemd/system/prometheus.service <<'_EOD_'
 [Unit]
 Description=Prometheus
@@ -85,3 +92,91 @@ _EOD_
 systemctl daemon-reload
 systemctl enable prometheus.service
 systemctl start prometheus.service
+
+else # hash systemctl
+# SysVinit
+cat > /etc/init.d/prometheus-relay-agent <<'_EOD_'
+#!/bin/bash
+#
+#   /etc/rc.d/init.d/prometheus-relay-agent
+#
+# chkconfig: 2345 70 30
+#
+# pidfile: /var/run/prometheus-relay-agent.pid
+
+# Source function library.
+. /etc/init.d/functions
+
+
+RETVAL=0
+ARGS="--config.file=/opt/prometheus/prometheus.yml"
+PROG="prometheus-relay-agent"
+DAEMON="/opt/prometheus/prometheus"
+PID_FILE=/var/run/${PROG}.pid
+LOG_FILE=/var/log/node_exporter.log
+LOCK_FILE=/var/lock/subsys/${PROG}
+GOMAXPROCS=$(grep -c ^processor /proc/cpuinfo)
+
+start() {
+    if check_status > /dev/null; then
+        echo "node_exporter is already running"
+        exit 0
+    fi
+
+    echo -n $"Starting node_exporter: "
+    ${DAEMON} ${ARGS} 1>>${LOG_FILE} 2>&1 &
+    echo $! > ${PID_FILE}
+    RETVAL=$?
+    [ $RETVAL -eq 0 ] && touch ${LOCK_FILE}
+    echo ""
+    return $RETVAL
+}
+
+stop() {
+    if check_status > /dev/null; then
+        echo -n $"Stopping node_exporter: "
+        kill -9 "$(cat ${PID_FILE})"
+        RETVAL=$?
+        [ $RETVAL -eq 0 ] && rm -f ${LOCK_FILE} ${PID_FILE}
+        echo ""
+        return $RETVAL
+    else
+        echo "node_exporter is not running"
+        rm -f ${LOCK_FILE} ${PID_FILE}
+        return 0
+    fi
+}  
+
+check_status() {
+    status -p ${PID_FILE} ${DAEMON}
+    RETVAL=$?
+    return $RETVAL
+}
+
+case "$1" in
+    start)
+        start
+        ;;
+    stop)
+        stop
+        ;;
+    restart)
+        stop
+        start
+        ;;
+    *)
+        N=/etc/init.d/${NAME}
+        echo "Usage: $N {start|stop|restart}" >&2
+        RETVAL=2
+        ;;
+esac
+
+exit ${RETVAL}
+_EOD_
+
+chmod +x /etc/init.d/prometheus-relay-agent
+chkconfig --add prometheus-relay-agent
+chkconfig prometheus-relay-agent on
+service prometheus-relay-agent start
+
+fi # hash systemctl