Install node_exporter

node_exporter_install_el6.sh

#!/usr/bin/env bash

# curl -fsSL https://gist.githubusercontent.com/bborysenko/c4c83702ccaae285135c8ed2617203f2/raw/node_exporter_install_el6.sh -o node_exporter_install_el6.sh
# bash node_exporter_install_el6.sh

wget https://github.com/prometheus/node_exporter/releases/download/v0.15.0/node_exporter-0.15.0.linux-amd64.tar.gz
tar -xzvf node_exporter-0.15.0.linux-amd64.tar.gz
mv node_exporter-0.15.0.linux-amd64/node_exporter /usr/bin/node_exporter
rm -rf node_exporter-0.15.0.linux-amd64 node_exporter-0.15.0.linux-amd64.tar.gz
mkdir /var/log/prometheus/ /var/run/prometheus
yum install -y daemonize

cat > /etc/init.d/node_exporter << EOL
#!/bin/bash
#
#	/etc/rc.d/init.d/node_exporter
#
# chkconfig: 2345 80 80
#
# config: /etc/prometheus/node_exporter.conf
# pidfile: /var/run/prometheus/node_exporter.pid

# Source function library.
. /etc/init.d/functions


RETVAL=0
PROG="node_exporter"
DAEMON_SYSCONFIG=/etc/sysconfig/\${PROG}
DAEMON=/usr/bin/\${PROG}
PID_FILE=/var/run/prometheus/\${PROG}.pid
LOCK_FILE=/var/lock/subsys/\${PROG}
LOG_FILE=/var/log/prometheus/node_exporter.log
DAEMON_USER="prometheus"
DAEMON_USER="root"
FQDN=\$(hostname --long)
GOMAXPROCS=\$(grep -c ^processor /proc/cpuinfo)

. \${DAEMON_SYSCONFIG}

start() {
  if check_status > /dev/null; then
    echo "node_exporter is already running"
    exit 0
  fi

  echo -n $"Starting node_exporter: "
  daemonize -u \${DAEMON_USER} -p \${PID_FILE} -l \${LOCK_FILE} -a -e \${LOG_FILE} -o \${LOG_FILE} \${DAEMON} \${ARGS}
  RETVAL=\$?
  echo ""
  return \$RETVAL
}

stop() {
    echo -n $"Stopping node_exporter: "
    killproc -p \${PID_FILE} -d 10 \${DAEMON}
    RETVAL=\$?
    echo
    [ \$RETVAL = 0 ] && rm -f \${LOCK_FILE} \${PID_FILE}
    return \$RETVAL
}

check_status() {
    status -p \${PID_FILE} \${DAEMON}
    RETVAL=\$?
    return \$RETVAL
}

case "\$1" in
    start)
        start
        ;;
    stop)
        stop
        ;;
    status)
	check_status
        ;;
    reload|force-reload)
        reload
        ;;
    restart)
        stop
        start
        ;;
    *)
        N=/etc/init.d/\${NAME}
        echo "Usage: \$N {start|stop|status|restart|force-reload}" >&2
        RETVAL=2
        ;;
esac

exit \${RETVAL}
EOL

chmod +x /etc/init.d/node_exporter
chkconfig --add node_exporter
chkconfig node_exporter on

cat > /etc/sysconfig/node_exporter << EOL
ARGS=""
EOL

service node_exporter start

sleep 5

curl -sS -f -o /dev/null 127.0.0.1:9100/metrics