Q. How to schedule MySQL database backup? A bash script for MySQL database backup. In this tutorial, you will find a simple bash script, which takes the backup of MySQL database, archive the backup and store on the local system. This script will also to remove older backups from disk to free space. You can specify the number of days to keep the backup on local disk. You can also use this tutorial to backup MySQL database and store a copy on the remote FTP server.
Create MySQL Backup Script
Now, copy the following content in a script file (like: /backup/mysql-backup.sh) and save on your Linux system. Use this link to download script. After than change some configuration values in section “Update below values” in the script as per your environment.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 | #!/bin/bash ################################################################ ## ## MySQL Database Backup Script ## Written By: Rahul Kumar ## URL: https://tecadmin.net/bash-script-mysql-database-backup/ ## Last Update: Jan 05, 2019 ## ################################################################ export PATH=/bin:/usr/bin:/usr/local/bin TODAY=`date +"%d%b%Y"` ################################################################ ################## Update below values ######################## DB_BACKUP_PATH='/backup/dbbackup' MYSQL_HOST='localhost' MYSQL_PORT='3306' MYSQL_USER='root' MYSQL_PASSWORD='mysecret' DATABASE_NAME='mydb' BACKUP_RETAIN_DAYS=30 ## Number of days to keep local backup copy ################################################################# mkdir -p ${DB_BACKUP_PATH}/${TODAY} echo "Backup started for database - ${DATABASE_NAME}" mysqldump -h ${MYSQL_HOST} \ -P ${MYSQL_PORT} \ -u ${MYSQL_USER} \ -p${MYSQL_PASSWORD} \ ${DATABASE_NAME} | gzip > ${DB_BACKUP_PATH}/${TODAY}/${DATABASE_NAME}-${TODAY}.sql.gz if [ $? -eq 0 ]; then echo "Database backup successfully completed" else echo "Error found during backup" exit 1 fi ##### Remove backups older than {BACKUP_RETAIN_DAYS} days ##### DBDELDATE=`date +"%d%b%Y" --date="${BACKUP_RETAIN_DAYS} days ago"` if [ ! -z ${DB_BACKUP_PATH} ]; then cd ${DB_BACKUP_PATH} if [ ! -z ${DBDELDATE} ] && [ -d ${DBDELDATE} ]; then rm -rf ${DBDELDATE} fi fi ### End of script #### |
After creating or downloading script make sure to set execute permission to run properly.
chmod +x /backup/mysql-backup.sh
Schedule Script in Crontab
Now schedule the script in crontab to run on a daily basis and complete backup on regular basis. Edit crontab on your system with crontab -e command. Add following settings to enable backup at 2 in the morning.
0 2 * * * root /backup/mysql-backup.sh
Save your crontab file. After enabling cron, the script will take backup automatically, But keep check backups on a weekly or monthly basis to make sure.
hello guys!
if [ ! -z ${DB_BACKUP_PATH} ]; then
cd ${DB_BACKUP_PATH}
if [ ! -z ${DBDELDATE} ] && [ -d ${DBDELDATE} ]; then
rm -rf ${DBDELDATE}
fi
fi
-z What is the effect?
I would add to the cron tab
>> /backup/logs .txt
so you know what’s happening if you check the logs
and I would store file dates in numbers, easier to parse than names, so instead of
30May2019
I would do: 2019.05.30
You need to add a “exit 1” after check for failed backup. If something is wrong in your database, preventng the script from running, you delete your old backups preventing you from restoring…
thanks. very good
Hi Rahul,
and if I want to copy just one table into another one, what have I to change?
Thank you
Hello Rahul, Thanks for your answer, but deleted older folders is still not working. Have you got any idea what can I do? May I send you an email with this script, you can check in your computer ?
Hello Rahul, I’ve a problem with this script. Everythink (connections with databse and dump database to folder) works great, but this script doesn’t delete folders older than example 5 days and I don’t know way. Only what I have changed is line : TODAY=`date “+%Y%m%d_%H:%M:%S” and DBDELDATE=`date “+%Y%m%d_%H:%M:%S” –date=”${BACKUP_RETAIN_DAYS} days ago”` , because I want to have folder like date_time. Could you help me and write where is my mistake. Thank for help.
Try syntax like belwo:
TODAY=`date +"%Y%m%d_%H:%M:%S"` DBDELDATE=`date +"%d%b%Y_%H:%M:%S" --date="${BACKUP_RETAIN_DAYS} days ago"`