Upgrading MySQL to MariaDB in CentOS 7.2
In my last post Upgrading CentOS 6.5 to CentOS 7.2 I upgraded the CentOS server, my next job was to upgrade MySQL to MariaDB. In CentOS 7 the default database is now MariaDB so in this post I will show the steps I took to do this.
If you've now already done so and you should have before upgrading the server backup your database see my post A Quick MySQL Backup And Restore on doing this, the remove MySQL with
yum remove mysql mysql-client compat-mysql51.x86_64 mysql-libs.x86_64
Once done then install the default MariaDB with
yum install mariadb-server mariadb
Then start MariaDB and enable it to start at boot time
systemctl start mariadb systemctl enable mariadb
and follow the instruction you can use the default settings.
Because we didn't remove are databases when we removed MySQL they have now been adopted by MariaDB this is because MariaDB is a drop in replacement for MYSQL but also I found the user table was corrupted so to fix this issue run mysqlcheck and enter your db password when prompted
mysqlcheck -uroot -p --all-databases --check-upgrade --auto-repair
Once done use the upgrade tool to fix any problems with the tables and again enter your db password when prompted
mysql_upgrade -uroot -p --force
And that should be it you have now successfully upgraded MySQL to MariaDB
Thanks and enjoy