mongo database export

mongo-db-export.sh

#!/bin/bash
# define collections that you want to export. if not defined, nothing will be exported
COLLECTIONS=(collection1 collection2 collection3)

# database access
DB_HOST=${1-'127.0.0.1'}
DB_NAME=${2-'main'}
DB_PORT=${3-'27017'}
DB_USER=${4-'root'}
DB_PASS=${5-''}

echo "DB_HOST: $DB_HOST"
echo "DB_NAME: $DB_NAME"
echo "DB_PORT: $DB_PORT"
echo "DB_USER: $DB_USER"
echo "DB_PASS: $DB_PASS"

# create directories where dump will be stored
mkdir -p db
mkdir -p db/$DB_NAME

for COLLECTION in "${COLLECTIONS[@]}"
do :
echo
echo "EXPORTING COLLECTION: $COLLECTION"
if [ -z "$DB_PASS" ]
then
  # in case when no password is set we won't pass any authorization data assuming it's not required
	mongoexport --host $DB_HOST --port $DB_PORT --db $DB_NAME --collection $COLLECTION --out db/$DB_NAME/$COLLECTION.json
else
	mongoexport --host $DB_HOST --port $DB_PORT --db $DB_NAME --username $DB_USER --password $DB_PASS --collection $COLLECTION --out db/$DB_NAME/$COLLECTION.json
fi
	
done