njmon script initd

===

njmon = nmon + JSON format + real-time push to a stats database + instant graphing of “all the stats you can eat” (AIX and Linux)

script shell:

# ll /usr/bin/njmon

# chmod 755 /usr/bin/njmon
# chown root:root /usr/bin/njmon
# chown root:root /etc/logrotate.d/njmon

shell

#!/bin/bash
#
#       /etc/init.d/nmon
#
# chkconfig: 345 70 55
# description: nmon init script

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

NJMON=/usr/bin/njmon
LOGDIR=/var/log/njmon
PIDFILE=/var/run/njmon.pid

if [ ! -d $LOGDIR/old ]; then
  # old for logrotated
  mkdir -p $LOGDIR/old
  chown root:root $LOGDIR
  chmod -R 755 $LOGDIR
fi

if [ ! -e $NJMON ]; then
  exit 5
fi

# collect NMON data every INTERVAL seconds
#INTERVAL=30

# assume /etc/logrotate.d/nmon will restart nmon once a day
# run for 1 day + 1 hour since anacron randomizes when logrotate runs

#COUNT=$(( (86400 + 3600) / $INTERVAL ))
#FILENAME=`hostname`.nmon
FILENAME=`hostname`.json

start() {
  if [ -f $PIDFILE ]; then
   action "Already running!" true
   return 0;
  else
    #$NMON -F $FILENAME -T -s 30 -c $COUNT -m $LOGDIR -p > $PIDFILE
    $NJMON -f $FILENAME -s 300 -c 288 -m $LOGDIR -k > $PIDFILE
    # just assume nmon started ok; exectue true so the output is correct
    action $"Starting njmon: " true
    touch /var/lock/subsys/njmon
    return 0
  fi
}

stop() {
  if [ -f $PIDFILE ]; then
    action "Shutting down njmon: " kill -s USR2 `cat /var/run/njmon.pid` 2> /dev/null
  else
    action "Shutting down njmon: " killall -s USR2 $NJMON 2> /dev/null
  fi
  
  rm -f /var/lock/subsys/njmon
  rm -f $PIDFILE
  
  return 0
}

case "$1" in
  start)
    start
    ;;
  stop)
    stop
    ;;
  restart)
    stop
    start
    ;;
  status)
    status nmon
    ;;
  *)
    echo "Usage: nmon {start|stop|restart|status}"
    exit 1
    ;;
esac
exit $?


    # service njmon on


---




logrotate.d setting:

```bash

/var/log/njmon/*.json {
  olddir old
  daily
  rotate 15
  size 0
  nocreate
  nocopy
  nomail
  missingok
  extension .json
  sharedscripts
  prerotate
    service njmon stop
  endscript
  postrotate
    service njmon start
  endscript
}