MySQL/MariaDB Backups Scheduling

Jelastic PaaS provides a convenient and straightforward script for backing up the stored data on the MySQL and MariaDB database nodes. Thus, the process is as simple as providing the required parameters and can be accomplished in a matter of minutes. Herewith, no specialized knowledge is needed - just follow the setup steps to configure the appropriate cron expression.

Additionally, we'll show how you can work with the created backups:

Set Up Backups

For this tutorial, we'll use the default backup script provided for the MySQL and MariaDB database nodes at Jelastic PaaS.

1. The source code of the script can be viewed directly within the dashboard. Click the Config button next to your database to open the built-in file manager and locate the /var/lib/jelastic/bin/backup_script.sh file.

jelastic mysql mariadb backup script
Tip: If you don't have an environment with the MySQL or MariaDB database yet, follow the Database Hosting guide to create one.

2. To automate the script execution, we'll use the cron scheduler available within the containers out-of-box. Open the /var/spool/cron/mysql file and provide a cron expression in the following format:

{frequency} {path-to-script} {script-parameters}

database cron config file
Here, you can use the commented examples as a template to define the required parameters:
  • {frequency} - sets the time of the script execution (see the guide linked above for details), e.g. */10 * * * *
  • {path-to-script} - points to the required script (default backup script is available for MariaDB and MySQL at /var/lib/jelastic/bin/backup_script.sh)
  • {script-parameters} - provides custom parameters for the defined script; the following ones are available in our case:
    • -m {mode} to backup whole or part of the database (“-m dumpall” or “-m dump” respectively)
    • -c {count} to set a number of the old backups to keep (e.g. “-c 3” to keep 3 old backups alongside the most recent one)
    • -u {user} and -p {password} to provide access credentials for your database (can be found in the after-creation email)
      Note: If your {password} contains special characters, it should be included in the double quotation. Also, due to the cron specifics, you need to provide additional escaping for the % symbol by adding a backslash before it, for example -p "passw\%rd".
    • -d {databases} and -t {tables} to optionally specify list of databases (“-d db1[,db2,db3....]”) or tables within a database (“-d db -t table1[,table2,table3....]”) to backup

3. For example, if you want to back up a whole database every 10 minutes with the help of the default script, then the string should be as follows:

*/10 * * * * /var/lib/jelastic/bin/backup_script.sh -m dumpall -c 3 -u root -p passw0rd

cron expression for db backup script

Save the settings to apply them.

4. To store data on some other node or the remote server, you can configure the appropriate mount point for your database.

store backups on remote server

Note: Any existing data in the mount point folder will be replaced with the files from the remote directory.

Alternatively, you can create a custom backup script, runnable from the remote server (database host, user, and password details will be required to establish a connection).

Check Backups

Wait for the script to be executed (depends on the configured cron frequency) and navigate to the /var/lib/jelastic/backup folder.

check database backup files
If the backup operation is successful, you'll see the appropriate bz2 archive within the directory.

Download Backup

There are multiple options to download a file from a Jelastic container:

1. The most straightforward variant is to use the configuration file manager directly in the dashboard.

download backups with the dashboard

Locate the required file, hover over it, and select Download from the context menu.

2. Another option is to use the SFTP/FISH protocol connection.

download backups with sftp fish protocols

The required access details can be viewed within the dashboard.

3. Also, you can install FTP add-on for your database to manage files via FTP.

Note: Public IP address is required for this option. If needed, it will be automatically attached to the node during add-on installation.

ftp add-on for backups download
Based on your preferences, you can choose any of the proposed options.

Restore Database

In case of necessity, you can easily restore your database from the backups.

1. Access the phpMyAdmin panel with the credentials you've got in the email sent after the creation of a DB node.

email with db access credentials
2. Navigate to the Import tab, tick the Browse your computer option, and use the Choose File button to upload the required backup.

import backups via db admin panel

Click Go at the bottom of the page.

3. When the import is successfully finished, you'll see the appropriate notification in the admin panel.

database successfully restored from backup
That's all! Now, you can be sure that all your data is periodically saved and, in case of necessity, can be restored or reused.