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#!/bin/sh

MONGODB_SHELL='/opt/mongodb/bin/mongo'

DUMP_UTILITY='/opt/mongodb/bin/mongodump'
DB_NAME='my_db'

date_now=`date +%Y_%m_%d_%H_%M_%S`
dir_name='db_backup_'${date_now}
file_name='db_backup_'${date_now}'.bz2'

log() {
    echo $1
}

do_cleanup(){
    rm -rf db_backup_2010* 
    log 'cleaning up....'
}

do_backup(){
    log 'snapshotting the db and creating archive' && \
    ${MONGODB_SHELL} admin fsync_lock.js && \
    ${DUMP_UTILITY} -d ${DB_NAME} -o ${dir_name} && tar -jcf $file_name ${dir_name}
    ${MONGODB_SHELL} admin unlock.js && \
    log 'data backd up and created snapshot'
}

save_in_s3(){
    log 'saving the backup archive in amazon S3' && \
    python aws_s3.py set ${file_name} && \
    log 'data backup saved in amazon s3'
}

do_backup && save_in_s3 && do_cleanup