centos7 & centos6 rrdcache

cat > /etc/systemd/system/rrdcached.service << EOF
[Unit]
Description=Data caching daemon for rrdtool
After=network.service

[Service]
Type=forking
PIDFile=/var/run/rrdcached.pid
ExecStart=/usr/sbin/rrdcached -w 3600 -z 1800 -f 7200 -s nagios -m 0660 -l unix:/var/run/rrdcached.sock -j /var/tmp -F

[Install]
WantedBy=default.target
EOF

systemctl enable rrdcached
systemctl restart rrdcached

#!/bin/sh
#
# chkconfig: 2345 19 81
# description: rrdcached startup script
#

. /etc/rc.d/init.d/functions

RETVAL=0

RRDCACHED="/usr/bin/rrdcached"
RRDCACHED_USER="root"
PIDFILE="/var/run/rrdcached.pid"
SOCKFILE="unix:/var/run/rrdcached.sock"
OPTS=" -w 3600 -z 1800 -f 7200 -m 0660 -j /var/tmp -F"

case "$1" in
   start)
      echo -n "Starting rrdcached: "
      [ -f $RRDCACHED ] || exit 1

      daemon --user=$RRDCACHED_USER $RRDCACHED $OPTS -p $PIDFILE -l $SOCKFILE
      RETVAL=$?
      echo
      [ $RETVAL -eq 0 ] && touch /var/lock/subsys/rrdcached
      ;;

  stop)
      echo -n "Shutting down rrdcached: "
      killproc rrdcached
      RETVAL=$?
      echo
      [ $RETVAL -eq 0 ] && rm -f /var/lock/subsys/rrdcached && rm -rf $PIDFILE
      ;;

  restart|reload)
      $0 stop
      $0 start
      RETVAL=$?
      ;;
  status)
      status rrdcached
      RETVAL=$?
      ;;
  *)
      echo "Usage: $0 {start|stop|restart|status}"
      exit 1
esac

exit $RETVAL

chkconfig --add rrdcached
ckkconfig rrdcached on
/etc/init.d/rrdcached start