Understanding MariaDB and Synology

Oct 13, 2025 by pynkocean.com 68 views

Introduction

As a Synology DS420+ user, you're likely familiar with the convenience of accessing your files and applications through the web interface. However, when it comes to managing MariaDB, a popular open-source relational database management system, things can get a bit more complicated. In this article, we'll explore the issue of MariaDB permission denied in /volume1/logs/mysql and provide a step-by-step guide on how to resolve it.

Understanding MariaDB and Synology

MariaDB is a popular alternative to MySQL, offering improved performance and scalability. Synology, on the other hand, is a network-attached storage (NAS) device that provides a user-friendly interface for managing files, applications, and services. When it comes to MariaDB on Synology, the default configuration often requires some tweaking to get everything working smoothly.

The Issue: MariaDB Permission Denied

When you try to access the MariaDB logs in /volume1/logs/mysql, you may encounter a permission denied error. This can be frustrating, especially if you're trying to troubleshoot issues with your database. The error message typically looks like this:

Permission denied: '/volume1/logs/mysql'

Why is this happening?

The permission denied error occurs because the MariaDB user doesn't have the necessary permissions to access the log files in /volume1/logs/mysql. By default, the MariaDB user is set to the mysql user, which doesn't have write permissions in the /volume1/logs/mysql directory.

Resolving the Issue

To resolve the permission denied error, you'll need to modify the MariaDB configuration to allow the mysql user to write to the log files. Here's a step-by-step guide:

Step 1: Edit the MariaDB Configuration File

First, you'll need to edit the MariaDB configuration file to enable the general log. Open the file /etc/my.cnf (or /etc/mysql/my.cnf on some systems) in a text editor and add the following lines:

[mysqld]
general_log
general_log_file = /volume1/logs/mysql/mariadb.log

Save the changes and restart the MariaDB service.

Step 2: Create a New Directory for MariaDB Logs

Next, you'll need to create a new directory for the MariaDB logs. You can do this using the Synology web interface or by using the command line. Here's how to do it using the command line:

sudo mkdir -p /volume1/logs/mysql

Step 3: Change the Ownership of the Log Directory

To allow the mysql user to write to the log files, you'll need to change the ownership of the log directory. You can do this using the chown command:

sudo chown mysql:mysql /volume1/logs/mysql

Step 4: Restart the MariaDB Service

Finally, restart the MariaDB service to apply the changes:

sudo service mariadb restart

Conclusion

In this article, we've explored the issue of MariaDB permission denied in /volume1/logs/mysql on Synology DS420+. We've provided a step-by-step guide on how to resolve the issue by modifying the MariaDB configuration, creating a new directory for the logs, changing the ownership of the log directory, and restarting the MariaDB service. With these steps, you should be able to access the MariaDB logs in /volume1/logs/mysql without encountering permission denied errors.

Additional Tips

Here are some additional tips to help you manage MariaDB on Synology:

Make sure to backup your MariaDB database regularly to prevent data loss.
Use the Synology web interface to manage MariaDB, as it provides a user-friendly interface for configuring and monitoring the database.
Consider using a third-party tool, such as phpMyAdmin, to manage MariaDB from the web interface.
Keep your MariaDB installation up-to-date with the latest security patches and updates.

Troubleshooting

If you encounter any issues while following these steps, here are some troubleshooting tips:

Check the MariaDB log files for any error messages that may indicate the cause of the issue.
Verify that the mysql user has the necessary permissions to write to the log files.
Check the ownership and permissions of the log directory to ensure that the mysql user has the necessary access.

Introduction

In our previous article, we explored the issue of MariaDB permission denied in /volume1/logs/mysql on Synology DS420+. We provided a step-by-step guide on how to resolve the issue by modifying the MariaDB configuration, creating a new directory for the logs, changing the ownership of the log directory, and restarting the MariaDB service. In this article, we'll answer some frequently asked questions (FAQs) related to MariaDB on Synology DS420+.

Q: What is the default location of the MariaDB logs on Synology DS420+?

A: The default location of the MariaDB logs on Synology DS420+ is /volume1/logs/mysql.

Q: Why do I need to create a new directory for the MariaDB logs?

A: You need to create a new directory for the MariaDB logs because the default location may not have the necessary permissions for the mysql user to write to it.

Q: How do I change the ownership of the log directory?

A: You can change the ownership of the log directory using the chown command. For example:

sudo chown mysql:mysql /volume1/logs/mysql

Q: Why do I need to restart the MariaDB service after making changes to the configuration?

A: You need to restart the MariaDB service after making changes to the configuration to apply the changes.

Q: Can I use a third-party tool to manage MariaDB on Synology DS420+?

A: Yes, you can use a third-party tool, such as phpMyAdmin, to manage MariaDB on Synology DS420+.

Q: How do I backup my MariaDB database on Synology DS420+?

A: You can backup your MariaDB database on Synology DS420+ using the mysqldump command. For example:

sudo mysqldump -u root -p password database_name > backup.sql

Q: What are some common issues that can cause the MariaDB permission denied error?

A: Some common issues that can cause the MariaDB permission denied error include:

Incorrect ownership or permissions of the log directory
Insufficient permissions for the mysql user
Conflicting configuration settings

Q: How do I troubleshoot the MariaDB permission denied error?

A: To troubleshoot the MariaDB permission denied error, you can:

Check the MariaDB log files for any error messages that may indicate the cause of the issue
Verify that the mysql user has the necessary permissions to write to the log files
Check the ownership and permissions of the log directory to ensure that the mysql user has the necessary access

Conclusion

In this article, we've answered some frequently asked questions (FAQs) related to MariaDB on Synology DS420+. We've covered topics such as the default location of the MariaDB logs, creating a new directory for the logs, changing the ownership of the log directory, and troubleshooting the MariaDB permission denied error. By following these tips and troubleshooting steps, you should be able to resolve the MariaDB permission denied error and manage your MariaDB database on Synology DS420+ with ease.

Additional Resources

For more information on MariaDB on Synology DS420+, you can refer to the following resources:

Synology official documentation: MariaDB on Synology DS420+
MariaDB official documentation: MariaDB Configuration
phpMyAdmin official documentation: phpMyAdmin Configuration

By following these resources and tips, you should be able to manage your MariaDB database on Synology DS420+ with ease.