Most OpenStack services use a database to store information. The database typically runs on the Controller node.
In this blog post you’ll find some basic troubleshooting and introduction to MariaDB database server OpenStack usage. If you wonder what MariaDB server has to with MySQL server you can check out this link.
First we’ll log into the database server that is running on our Controller node
root@controller:~# mysql -u root -p
After we have entered our DB server password we can see what users have been configured to have access to our database server Continue reading