mongo-backup.sh

#!/bin/bash

# Shell Script To Backup Mongo Databases

# Author:		V. Alex Brennen <vab@cryptnet.net>
# Copyright:	None
# License:		Public Domain
# Created:		2017.02.08
# Dependencies:	Mongodump (MongoDB) and bzip2 (for optional compression)

# Description:	This script to used to create a bson dump of all dbs on a
#				MonogoDB installation.


# Programs that will be used
MONGODUMP=/usr/bin/mongodump
BZIP2=/usr/bin/bzip2
NICE=/bin/nice

# File locations
BACKDIR=/mnt/backups/database_exports/mongo

# Other settings
## Shell User
SHUSER=mongoback
## Compression level
CLVL="-9"
## Use nice
BE_NICE=1
## Nice level 
NLVL=19

# Get the date information that we'll use for the backup directories and 
# to construct the backup file names
YEAR="$(date +"%Y")"
MONTH="$(date +"%m")"
DAY="$(date +"%d")"

# Make Sure the back-up directory for the current year exists and is 
# writable by the back-up script.
BACKDIR="$BACKDIR/$YEAR"

if [ ! -d "$BACKDIR" ]; then
        eval "/bin/mkdir $BACKDIR"
fi

if [ ! -w "$BACKDIR" ]; then
        eval "/bin/chown $SHUSER:$SHUSER $BACKDIR"
        eval "/bin/chmod 775 $BACKDIR"
fi

# Make sure the back-up directory for the current month exists and is
# writable by the back-up script.
BACKDIR="$BACKDIR/$MONTH"

if [ ! -d "$BACKDIR" ]; then
        eval "/bin/mkdir $BACKDIR"
fi

if [ ! -w "$BACKDIR" ]; then
        eval "/bin/chown $SHUSER:$SHUSER $BACKDIR"
        eval "/bin/chmod 775 $BACKDIR"
fi

# Dump The databases and un/pw metadata
## note need date code here
eval "$MONGODUMP --out $BACKDIR/mongodump-$YEAR-$MONTH-$DAY"

# This is the function that does the actual compression and 
# directory transversal.
function compress_files
{
	for i in $("ls *");
	do
		if [ -f "$i" ]; then
		    if [ $BE_NICE -eq 1 ]; then
                eval "$NICE -$NLVL $BZIP2 $CLVL $i"
		    else
                eval "$BZIP2 $CLVL $i"
			fi
		elif [ -d "$i" ]; then
			cd "$i" || exit 1
			compress_files
			cd .. | exit 1
		fi
	done
}

# Compress the bson export files
eval "cd $BACKDIR/mongodump-$YEAR-$MONTH-$DAY"
compress_files