Lucene Solr Backup Script

#!/bin/bash
solr_home="/opt/jboss/solr/";
solr_backup_folder="/solr_backup/";
today="$(date +%d%m%Y)";
todays_backup="backup.$(date +%Y%m%d)*"
index_name_tag1="corename=\"";
index_name_tag2="\"instanceDir";
instance_dir_tag1="instanceDir=\"";
instance_dir_tag2="\"/>";
logfile="/tmp/solr/solr_backup.log";
overall_result="ok";

rm -f ${logfile};

echo ${today}" solr backup logs \n" >> ${logfile};
echo "solr_home = "${solr_home}" \n" >> ${logfile};
echo "solr_backup_folder = "${solr_backup_folder}" \n" >> ${logfile};

cd ${solr_home};

cat ${solr_home}"solr.xml" | while read line
do
 line=$(echo $line|sed 's/ //g');
 index_name_prefix="${line%${index_name_tag1}*}";
 index_name_suffix="${line#*${index_name_tag2}}";
 index_name_noprefix="${line#${index_name_prefix}${index_name_tag1}}";
 instance_dir_prefix="${line%${instance_dir_tag1}*}";
 instance_dir_suffix="${line#*${instance_dir_tag2}}";
 instance_dir_noprefix="${line#${instance_dir_prefix}${instance_dir_tag1}}";

 if [ ! "$index_name_noprefix" == "$line" ]
   then
   index_name="${index_name_noprefix%${index_name_tag2}${index_name_suffix}}"
   instance_dir="${instance_dir_noprefix%${instance_dir_tag2}${instance_dir_suffix}}"
   echo "----- index name "${index_name}" \n"  >> ${logfile}
   echo "----- instance directory "${instance_dir}" \n" >> ${logfile}

   echo "removing old snapshots \n" >> ${logfile}
   cd ${instance_dir}"data"
   old_snapshots=`ls -d backup.2*`
   echo $old_snapshots" \n" >> ${logfile}
   rm -rf ${instance_dir}data/backup.2*

   echo "taking snapshot \n" >> ${logfile}
   cd ${solr_home}
   sh bin/backup -d ${index_name}/data
   cd ${instance_dir}"data/"
   solr_snapshot=`ls -td ${todays_backup}  | awk 'NR<2'`
   echo $solr_snapshot" \n" >> ${logfile}
   echo "copying snaphot to backup folder \n" >> ${logfile}
   cp -fr ${instance_dir}data/$solr_snapshot ${solr_backup_folder}${index_name}/

   cd ${solr_backup_folder}$index_name
   echo "controlling is backup copied \n" >> ${logfile}
   if [ ! -d "${solr_backup_folder}$index_name/$solr_snapshot" ] || [ "$solr_snapshot" == "" ]
     then
     echo $solr_snapshot" does not exist in "${solr_backup_folder}$index_name" \n" >> ${logfile}
     overall_result="no";
     else
     echo $solr_snapshot" exists in "${solr_backup_folder}$index_name" \n" >> ${logfile}
     echo "removing old backups \n" >> ${logfile}
     old_backups=`ls -td backup.* | awk 'NR>2'`
     echo $old_backups" \n" >>${logfile}
     ls -td backup.* | awk 'NR>2' | xargs rm -rf
   fi
 fi
done

mailtext=$(cat ${logfile})
if [ "$overall_result" == "ok" ]
  then
  echo -e $mailtext | mail -s "solr backups overall successful" solr_report@report.test.com
  else
  echo -e $mailtext | mail -s "solr backups overall failed !!!" solr_report@report.test.com
fi