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#!/bin/bash
################################################################################
#0 * * * * /root/dhmon/mongo-backup.sh >> /root/dhmon/full_mongo_backup.log 2>&1
################################################################################
export PATH=/bin:/usr/bin:/usr/local/bin:/var/lib/mongodb/bin
TODAY=`date +"%Y%m%d%H%M%S"`

######################################################################
DB_BACKUP_PATH='/data/mongodb/backup'
MONGO_HOST='127.0.0.1'
MONGO_PORT='10001'

# If mongodb is protected with username password.
# Set AUTH_ENABLED to 1
# and add MONGO_USER and MONGO_PASSWD values correctly
AUTH_ENABLED=1
MONGO_USER='root'
MONGO_PASSWD='root'


# Set DATABASE_NAMES to "ALL" to backup all databases.
# or specify databases names seprated with space to backup
# specific databases only.

DATABASE_NAMES='ALL'
#DATABASE_NAMES='mydb db2 newdb'

## Number of days to keep local backup copy
BACKUP_RETAIN_DAYS=15

######################################################################
######################################################################
# Create backup directory
if ! mkdir -p ${DB_BACKUP_PATH}/${TODAY}; then
  echo "Can't create backup directory in ${DB_BACKUP_PATH}. Go and fix it!" 1>&2
  exit 1;
fi;

AUTH_PARAM=""

if [ ${AUTH_ENABLED} -eq 1 ]; then
    AUTH_PARAM=" --username ${MONGO_USER} --password ${MONGO_PASSWD} "
fi

if [ ${DATABASE_NAMES} = "ALL" ]; then
    echo "Running backup for all databases at $(date +"%Y-%m-%d:%H-%M-%S"). "
    echo "--------------------------------------------"
    mongodump --host ${MONGO_HOST} --port ${MONGO_PORT} ${AUTH_PARAM} --gzip --oplog --out ${DB_BACKUP_PATH}/${TODAY}/

else
    echo "Running backup for selected databases"
    for DB_NAME in ${DATABASE_NAMES}
    do
        mongodump --host ${MONGO_HOST} --port ${MONGO_PORT} --db ${DB_NAME} ${AUTH_PARAM}  --gzip --out ${DB_BACKUP_PATH}/${TODAY}/
    done
fi


######## Remove backups older than {BACKUP_RETAIN_DAYS} days  ########
if [ ! -z ${DB_BACKUP_PATH} ]; then
      cd ${DB_BACKUP_PATH}
      find $DB_BACKUP_PATH -type f -mtime +$BACKUP_RETAIN_DAYS -exec rm {} +
      echo "--------------------------------------------"
      echo "Database backup complete at $(date +"%Y-%m-%d:%H-%M-%S")!"
fi


######################### End of script ##############################