Pipe memcache stats into Graphite

memcache-stats.sh

#!/bin/bash

if [ "$1" != "report" ]; then
   echo "Usage:" >&2
   script="`basename $0`"
   echo "  nohup $script report > /var/log/memcache-stats.log &" >&2
   exit 1
fi

GRAPHITE_SERVER=localhost
GRAPHITE_PORT=2003
GRAPHITE_INTERVAL=10

while true; do
   # Do it in a backgrounded subshell so we can move
   # directly on to sleeping for $GRAPHITE_INTERVAL
   (
      # Get a timestamp for sending to graphite
      ts=`date +%s`

      # memcache gives us some decent stats in the form of 
      # STAT bytes_read 4535820
      output=`service memcached status 2>/dev/null |
              grep STAT |
              grep -v version |
              sed "s/STAT /memcache\./"` 

      # Pipe the output through sed, using a regex to
      # append a $ts timestamp to the end of each line,
      # and then to the correct server and port using netcat
      echo "$output" |
       sed "s/\$/ $ts/" |
       nc $GRAPHITE_SERVER $GRAPHITE_PORT

      # Echo this data too in case we want to record
      # it to a log
      echo `date "+%Y-%m-%d_%H:%M:%S"`
      echo "$output"
      echo; echo
   ) &
   sleep $GRAPHITE_INTERVAL
done;