This doesn't sound like an easy one to troubleshoot. Some suggestions: verify which user account runs the MySQL server process, with something like `ps aux | grep mysql` and/or `ps aux | grep maria`, and then run `chown -R mysql:mysql /etc/mysql_certs`. Depending on your config, if MySQL is running chrooted then you might need to put the certificate and key inside the MySQL folders rather than next to them. Finally, this article was written a few years back. It's possible that newer versions of MySQL or MariaDB expect the files in a different format. Maybe check the documentation to see what format is expected, and use the openssl command line tools to check the format of the files and convert them if necessary.
This doesn't sound like an easy one to troubleshoot. Some suggestions: verify which user account runs the MySQL server process, with something like `ps aux | grep mysql` and/or `ps aux | grep maria`, and then run `chown -R mysql:mysql /etc/mysql_certs`. Depending on your config, if MySQL is running chrooted then you might need to put the certificate and key inside the MySQL folders rather than next to them. Finally, this article was written a few years back. It's possible that newer versions of MySQL or MariaDB expect the files in a different format. Maybe check the documentation to see what format is expected, and use the openssl command line tools to check the format of the files and convert them if necessary.