Script to migrate Graphite Whisper data from one dir to another

whisper-path-migrate.sh

#!/bin/bash

## Adjustments
PATH=/bin:/usr/bin:/sbin:/usr/sbin
CARBON_SCRIPT=/etc/init.d/carbon-cache
CARBON_CONF=/etc/carbon/carbon.conf
RSYNC_OPTIONS='-av --ignore-existing'
WHISPER_BIN=/usr/bin

execute_cutover () {
  $CARBON_SCRIPT stop >> $OUTPUT_LOG 2>&1
  SED_TO_PATH=$(echo $TO_PATH |sed 's/\//\\\//g')
  sed -i "s/^\(LOCAL_DATA_DIR\W*=\)/\1$SED_TO_PATH/" $CARBON_CONF >> $OUTPUT_LOG 2>&1
  $CARBON_SCRIPT start >> $OUTPUT_LOG 2>&1
}
## End adjustments

if [ $# -eq 2 ]
then
  FROM_PATH=$1
  TO_PATH=$2
  if ! $(echo $FROM_PATH | grep -q /\$)
  then
    FROM_PATH=$FROM_PATH/
  fi
  if ! $(echo $TO_PATH | grep -q /\$)
  then
    TO_PATH=$TO_PATH/
  fi

  if ! [ -d $FROM_PATH -a -d $TO_PATH ]
  then
    echo "Unable to validate existance of 'from' and 'to' paths"
    exit 1
  fi
else
  echo "Usage $0 <from_path> <to_path>"
  exit 1
fi

START_TIME=$(date +%s)
OUTPUT_LOG=/tmp/whisper-migrate.$START_TIME.log

echo "Beginning migrate at $START_TIME. Outputting details to $OUTPUT_LOG"
echo "Performing initial rsync of Whisper files from $FROM_PATH to $TO_PATH"
rsync $RSYNC_OPTIONS $FROM_PATH $TO_PATH >> $OUTPUT_LOG 2>&1

echo "Rsync Complete"

echo "Cutting over carbon-cache to the new storage path"
execute_cutover

echo "Migrating missed points since $START_TIME"
pushd $FROM_PATH >> $OUTPUT_LOG 2>&1
for whisper_file in $(find . -name \*.wsp)
do
  if ! [ -e $TO_PATH/$whisper_file ]
  then
    echo "Warning: $TO_PATH/$whisper_file does not exist"
  else
    $WHISPER_BIN/whisper-update.py $TO_PATH/$whisper_file $($WHISPER_BIN/whisper-fetch.py --from $START_TIME $whisper_file | grep -v None | awk '{printf "%d:%d ",$1,$2}') >> $OUTPUT_LOG 2>&1
  fi
done
popd >> $OUTPUT_LOG 2>&1

echo "Migration complete!"