gistfile1.txt

#!/bin/sh
# This script should live in /engineyard/bin/ and be named monit_merb

mdk_merb() {
  if [ -e "${PIDFILE}" ]; then
    OLDPID=`cat ${PIDFILE}`
    if [ ! -d /proc/$OLDPID ]; then
      rm -f $PIDFILE
      OLDPID=""
    fi
  fi
  #Pid file didn't exist, ask pgrep for it
  if [ "$OLDPID" = "" ]; then
    OLDPID=`pgrep -f "ruby.*merb -p $PORT"`
  fi

  if [ "$OLDPID" != "" ]; then
    #Try stopping it gracefully, kill $OLDPID is the same as cluster::stop
    kill $OLDPID
    # 5 seconds really isn't enough of a wait time, but it's good for situations where shit hit the fan
    sleep 5
    #Does the process still exist?  If it does, client sites are gonna white screen
    if [ -e /proc/$OLDPID ]; then
      #Murder the damn thing.  Kill em, fuckin' kill em.
      kill -9 $OLDPID
      sleep 3
      #Does it still exist!?!  Atleast give some log love alerting us that it failed
      if [ -e /proc/$OLDPID ]; then
        #Alert someone? and exit with an error
        echo "Process $OLDPID won't die!" >> /var/log/engineyard/merb/$APPLICATION/merb.$PORT.log 2>&1
        exit 1
      fi
    fi
  fi
  [ -e "$PIDFILE" ] && rm -f $PIDFILE
  return 0
}

usage() {
  echo "Usage: $0 application {start, stop} port"
  echo "$0 kongregate start 5000"
  echo "You can also run it w/o parameters from monit"
  echo "and the application/command/port will be inferred by monit env variables"
  echo "These variables are MONIT_SERVICE and MONIT_EVENT"
  echo "$0"
  exit 1
}

##
# script actually starts
##
if [ $# -lt 3 ]; then # running under monit w/o params
  ACTION="`echo "$MONIT_EVENT" | tr \"[:upper:]\" \"[:lower:]\"`"  # translate Start to start and Stop to stop
  APPLICATION="`echo $MONIT_SERVICE | perl -p -e 's/^([^_]+)_(.*)?_(\d+)/$2/'`" # grab the stuff between the services 
  PORT="`echo $MONIT_SERVICE | perl -p -e 's/^([^_]+)_(.*)?_(\d+)/$3/'`" # grab the port out of the last stuff
  ENVIRONMENT="production"
  echo "Grabbed params from monit $APPLICATION,$ACTION,$PORT" > /var/log/engineyard/merb/monit_merb.log 2>&1
  # [ -z $ACTION ] || [ -z $APPLICATION ] || [ -z $PORT ] && usage
elif [ $# -lt 4 ]; then
  APPLICATION=$1 ; ACTION=$2 ; PORT=$3 ; USER=$1 ; ENVIRONMENT="production"
else
  APPLICATION=$1 ; ACTION=$2 ; PORT=$3 ; USER=$4 ; ENVIRONMENT=$5
fi

# Now that we have some variables let's set the PIDFILE
PIDFILE="/data/$APPLICATION/shared/log/merb.$PORT.pid"
INLINEDIR=/tmp/inline_$$; export INLINEDIR
HOME=$USER; export HOME
export USER
# what it do? 
case $ACTION in
  start*)
    mdk_merb
    cd /data/$APPLICATION/current
    MERB="/usr/bin/merb -p $PORT -e $ENVIRONMENT -d -u $USER -G $USER"
    if [ `merb -v | sed 's/^.*merb [0-9].\([0-9]\).[0-9].*$/\1/'` -ge 9 ]; then
      PIDFILE="/var/run/merb/$APPLICATION/merb.$PORT.pid"
      MERB="$MERB -P $PIDFILE -e $ENVIRONMENT -L /var/log/engineyard/merb/$APPLICATION/merb.$PORT.log -m /data/$APPLICATION/current"
    fi
    echo $MERB
    `$MERB`
    STATUS=$?
    if [ "$STATUS" = "0" -a -x /engineyard/bin/eyadjust ]; then
      sleep 2
      /engineyard/bin/eyadjust
    fi
    exit $STATUS
    ;;
  stop*)
    mdk_merb
    exit $?
    ;;
  *)
    echo 2>&1 'Unrecognized Monit Command: $ACTION'
    usage
    exit 1
    ;;
esac