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書名： Production Ready OpenStack：Recipes for Successful Environments
作者名： Arthur Berezin
本章字數： 263字
更新時間： 2021-07-09 21:45:14

Installing MariaDB database

Most OpenStack projects and their components keep their persistent data and objects' status in a database. MySQL and MariaDB are the most used and tested databases with OpenStack. In our case, and in the most commonly deployed layout, controller-Neutron-compute, the database is installed on the controller node.

Run the following commands on the controller node!

How to do it...

Proceed with the following steps:

Install MaridaDB packages as follows:

[root@controller ~]# yum install mariadb-galera-server

Yum might deploy additional packages after resolving MariaDB's dependencies. A successful installation should output as follows:

Installed:
  mariadb-galera-server.x86_64 1:5.5.37-7.el7ost

Dependency Installed:
  mariadb.x86_64 1:5.5.37-1.el7_0
  mariadb-galera-common.x86_64 1:5.5.37-7.el7ost
  mariadb-libs.x86_64 1:5.5.37-1.el7_0
  perl-DBD-MySQL.x86_64 0:4.023-5.el7
Complete!

Start MariaDB database service using systemctl command as a root:
```
[root@controller ~]# systemctl start mariadb.service
```
If no output is returned, this means the command is completed successfully.
Enable it, so it starts automatically after reboot:
```
[root@controller ~]# systemctl enable mariadb.service
```
MariaDB maintains its own user accounts and passwords; root is the default administrative user name account that MariaDB uses. We should change the default password for the root account as keeping the default password is a major security treat.
Change the database root password as follows, where new_password is the password we want to set:
```
[root@controller ~]# mysqladmin -u root password new_password
```
Keep this in the passwords' list; we will need to create databases for the services we will deploy in the following parts of the chapter.

There's more...

Almost all components require access to the database; hence, we should keep port 3306 open for new connections on the controller node:

[root@controller ~]# firewall-cmd --add-port=3306/tcp --permanent

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Production Ready OpenStack：Recipes for Successful Environments

Installing MariaDB database

How to do it...

There's more...