#!/bin/bash

# mongo-backup.sh
#   Script to automate MongoDB Backups
#
# Requirements:
#   mongodump
#
# Author:
#   Eduardo Hernacki <eduardohki@gmail.com>
#
# Version:
#   1.1 - 2017/08/08
#
# NOTE:
#   In case of permission errors in mongodump with "admin" user,
#   please add the following commands in "mongo" shell:
#
#   > use admin
#   > db.auth("admin", "<your_password>")
#   > db.grantRolesToUser( "admin", [{ role: "backup", db: "admin" }])
#   > exit
#

# Backup destination
DUMP_DIR="/var/backup/mongodb"

# Destino do arquivo de logfile
LOG_FILE=$DUMP_DIR/backup.log

# Credenciais MongoDB
MONGO_USER=admin
MONGO_PASS=<senha_admin_mongodb>
MONGO_AUTHDB=admin

# Registra inicio de execução no arquivo de log
echo "[$(date +%Y/%m/%d\ %H:%M:%S)] Starting mongodump" >> $LOG_FILE

# Executa o dump do MongoDB no diretorio especificado
mongodump --host localhost --username $MONGO_USER --password $MONGO_PASS --authenticationDatabase $MONGO_AUTHDB --out $DUMP_DIR >> $LOG_FILE 2>&1

# Checks the dump execution
if [ $? -eq 0 ]; then
  echo "[$(date +%Y/%m/%d\ %H:%M:%S)] mongodump successfully created" >> $LOG_FILE
  OUTPUT="OK: MongoDB Dump successfully created"
  EXITCODE=0
else
  echo "[$(date +%Y/%m/%d\ %H:%M:%S)] mongodump finished with errors" >> $LOG_FILE
  OUTPUT="CRITICAL: Errors creating MongoDB Dump! Please verify the log \"$LOG_FILE\" for more details"
  EXITCODE=2
fi

echo $OUTPUT
exit $EXITCODE