MongoDB backup script

Last year while I was working in a project, I needed to automate thewhole backing up process from taking snapshot of the current db to saving it to AWS S3 buckets. At that time I took most of the staffs from this blog post.

Couple of days ago, I started to code for making small backup scriptthat will backup to another cloud machine rather than to AWS S3.  Instead of  coding it from scratch, I reused my previously coded script. All I need to implement a bash function(save_in_cloud) which runs a simple scp command :)

The whole script look like below:

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#!/bin/sh   MONGODB_SHELL='mongo' DUMP_UTILITY='mongodump' #SET the bd name which one you want to backup DB_NAME=''   #SET server path where you want to save the file CLOUD_PATH=''   #SET your user name SERVER_USER=''   #SET your host name or IP of the server HOST_NAME=''   date_now=`date +%Y_%m_%d_%H_%M_%S` dir_name='db_backup_'${date_now} file_name='db_backup_'${date_now}'.bz2' current_year=`date +%Y`     log() { echo $1 }   do_cleanup(){ rm -rf 'db_backup_'${current_year}* log 'cleaning up....' }   do_backup(){ log 'snapshotting the db and creating archive' && \ ${MONGODB_SHELL} admin fsync_lock.js && \ log 'db locked and creating backup' ${DUMP_UTILITY} -d ${DB_NAME} -o ${dir_name} && tar -jcf $file_name ${dir_name} && \ ${MONGODB_SHELL} admin fsync_unlock.js && \ log 'data backd up and created snapshot' }   save_in_cloud(){ log 'saving backup to another server...' scp ${file_name} ${SERVER_USER}@${HOST_NAME}:${CLOUD_PATH} log 'saved scuccessfully' }     do_backup && save_in_cloud && do_cleanup

view rawmongo_backup_script hosted with ❤ by GitHub

I reused this script, all I did just added a new function which copy the current backup data to a remote server.  And also updated do_cleanup, now it works in any year.

The backup script depends on other two js (fsync_lock.js andfsync_unlock.js) functions which responsible for locking mongo during  db snapshots and releasing lock  after the  snapshots.