Backup and sync two mongo databases

syncdb.sh

#!/usr/bin/env bash

# Syncronize remote DB to local instance

remote_db="myremote-mongo.com"
local_db="localhost"
db_name="my_db_name"

# Get current date and store it in $date
printf -v date '%(%Y-%m-%d)T\n' -1
script_dir="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
backup_folder=${script_dir}/dump_$date

# Backup current DB
mongodump -h $remote_db --port 27017 -o $backup_folder

# Clear local database first
mongo $db_name --host localhost --eval "db.dropDatabase();"

# Restore backup to local DB
mongorestore -h $local_db $backup_folder