lucene/src/scripts/snapcleaner

#!/bin/bash
#
# Copyright 2006 The Apache Software Foundation
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# Shell script to clean up snapshots of a Solr Lucene collection.

orig_dir=$(pwd)
cd ${0%/*}/..
solr_root=$(pwd)
cd ${orig_dir}

unset days num data_dir user verbose debug
. ${solr_root}/bin/scripts-util

# set up variables
prog=${0##*/}
log=${solr_root}/logs/${prog}.log

# define usage string
USAGE="\
usage: $prog -D <days> | -N <num> [-d dir] [-u username] [-v]
       -D <days>   cleanup snapshots more than <days> days old
       -N <num>    keep the most recent <num> number of snapshots and
                   cleanup up the remaining ones that are not being pulled
       -d          specify directory holding index data
       -u          specify user to sudo to before running script
       -v          increase verbosity
       -V          output debugging info
"

# parse args
while getopts D:N:d:u:vV OPTION
do
    case $OPTION in
    D)
        days="$OPTARG"
        ;;
    N)
        num="$OPTARG"
        ;;
    d)
        data_dir="$OPTARG"
        ;;
    u)
        user="$OPTARG"
        ;;
    v)
        verbose="v"
        ;;
    V)
        debug="V"
        ;;
    *)
        echo "$USAGE"
        exit 1
    esac
done

[[ -n $debug ]] && set -x

if [[ -z ${days} && -z ${num} ]]
then
    echo "$USAGE"
    exit 1
fi

fixUser "$@"

# use default value for data_dir if not specified
# relative path starts at ${solr_root}
if [[ -z ${data_dir} ]]
then
    data_dir=${solr_root}/data
elif [[ "`echo ${data_dir}|cut -c1`" != "/" ]]
then
    data_dir=${solr_root}/${data_dir}
fi

function remove
{
    syncing=`ps -fwwwu ${user}|grep -w rsync|grep -v grep|grep -w $1`
    if [[ -n $syncing ]]
    then
	logMessage $1 not removed - rsync in progress
    else
	logMessage removing snapshot $1
	/bin/rm -rf $1
    fi
}

start=`date +"%s"`

logMessage started by $oldwhoami
logMessage command: $0 $@

# trap control-c
trap 'echo "caught INT/TERM, exiting now but partial cleanup may have already occured";logExit aborted 13' INT TERM

if [[ -n ${days} ]]
then
    logMessage cleaning up snapshots more than ${days} days old
    for i in `find ${data_dir} -name "snapshot.*" -maxdepth 1 -mtime +${days} -print`
    do
        remove $i
    done
elif [[ -n ${num} ]]
then
    logMessage cleaning up all snapshots except for the most recent ${num} ones
    unset snapshots count
    snapshots=`ls -cd ${data_dir}/snapshot.* 2>/dev/null`
    if [[ $? == 0 ]]
    then
        count=`echo $snapshots|wc -w`
        startpos=`expr $num + 1`
        if [[ $count -gt $num ]]
        then
            for i in `echo $snapshots|cut -f${startpos}- -d" "`
            do
	        remove $i
	    done
        fi
    fi
fi

logExit ended 0