mariadb

Migrating From MySQL 5.7 to MariaDB 10.2 on Ubuntu 16.04

Choose Maria

For those unfamiliar with MariaDB, it’s a fork of MySQL that is dedicated to remaining free to use. It was created the day Oracle bought out Sun Microsystems in 2010 who had previously acquired MySQL in 2008. MariaDB was built by the very developers who worked on MySQL and for most users the transition to MariaDB should be fairly painless. All of the clients and tools that work with MySQL work with MariaDB as well.

This guide is for those like me who have servers running Ubuntu’s latest long-term release 16.04. I found some guides migrating from older versions of MySQL and Ubuntu, but nothing current. The following steps worked on a server housing several customized WordPress sites. I tested this out on a VM with snapshots which allowed me to rollback any changes when problems arose. If this is being done in production, I highly recommend at the very least taking full backups of all of your databases before the migration if not taking full images of your server. And with that warning out of the way, let’s begin.

Inviting Maria In

You’ll want to migrate to the latest stable version of MariaDB which is 10.2. The Ubuntu repositories only include 10.0 so we’ll need to add the MariaDB 10.2 repository.

Open a Terminal or SSH into your server and run the following.

Saying Farewell to My

Most guides I’ve found have various ways to uninstall MySQL before installing MariaDB, but I’ve found that Ubuntu is smart enough to uninstall the unnecessary MySQL packages during the MariaDB installation.

During the installation, you’ll be prompted twice to setup the root password for MariaDB. Just leave this blank and it will use the existing MySQL root password.

Cleaning Up After Maria

Now that MariaDB is installed and MySQL is no more, we should check that MariaDB installed correctly and is running.


MariaDB Post-Install Status
MariaDB Post-Install Status

As you can see, even though MariaDB is running, there are a few errors showing. This is common during a MySQL/MariaDB upgrade or migration. We need to run the post upgrade script to clear up these errors.

Don’t be thrown by the name of the command. As stated earlier, pretty much all of the commands, clients & tools written for MySQL work with MariaDB. When prompted, enter the old MySQL root password which is now your MariaDB root password then restart MariaDB.


MariaDB Post-Cleanup Status
MariaDB Post-Cleanup Status

The errors you saw before should all be gone now and we’re one last step away from MariaDB goodness

Sprucing up Ubuntu

There are a few packages that need to be updated now that we’ve added the MariaDB repository. We’ll take care of that now.

That’s it. For most, this will probably be the easiest migration you’ll ever do. You’ll definitely want to do a check of your databases and any applications or websites that rely on backend databases. I luckily didn’t run into any issues after migrating.

Hope this guide is helpful to those who are ready to make the leap to MariaDB or at least got you curious enough to check her out. I mean how could you say no to that face.


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