How to install MySQL 8 database server on CentOS 8

How to install MySQL 8 database server on CentOS 8

MySQL is a free open source code and one of the most popular database systems in the world. It is a relational database management platform supported by Oracle Cloud. It uses a structured query language to add, access, and manage content in the database. It is known for its reliability, fast processing, ease of use, and flexibility. Several new features were added in MySQL 8, including JSON support, transaction data dictionary, persistent runtime configuration, document storage, optimizer hints, SQL roles, CTE and Window functions, invisible indexes, and more.

note: Before installing MySQL 8, see Official documents Due to some new features and changes in MySQL 8, some applications are not compatible with this version.

In this tutorial, we will show you how to install a MySQL 8 database on a CentOS 8 server.

prerequisites

  • Server 8 running CentOS.
  • A root password is set on your server.

Install MySQL 8.0 from the MySQL repository

By default, MySQL 8.0 is not available in the CentOS 8 default repository. Therefore, you need to install the MySQL 8.0 community repository into your system. You can use the following command to install:

rpm -ivh https://dev.mysql.com/get/mysql80-community-release-el8-1.noarch.rpm

You should see the following output:

Retrieving https://dev.mysql.com/get/mysql80-community-release-el8-1.noarch.rpm
warning: /var/tmp/rpm-tmp.hF0m5V: Header V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEY
Verifying...                          ################################# [100%]
Preparing...                          ################################# [100%]
Updating / installing...
   1:mysql80-community-release-el8-1  ################################# [100%]

Next, verify that the MySQL 8.0 repository is enabled using the following command:

dnf repolist all | grep mysql | grep enabled

You should see the following output:

CentOS-8 - AppStream                            3.1 MB/s | 6.5 MB     00:02    
CentOS-8 - Base                                 3.0 MB/s | 5.0 MB     00:01    
CentOS-8 - Extras                               5.3 kB/s | 2.1 kB     00:00    
MySQL 8.0 Community Server                       24 MB/s | 543 kB     00:00    
MySQL Connectors Community                      1.9 MB/s |  19 kB     00:00    
MySQL Tools Community                           677 kB/s |  62 kB     00:00    
mysql-connectors-community         MySQL Connectors Community     enabled:    42
mysql-tools-community              MySQL Tools Community          enabled:    19
mysql80-community                  MySQL 8.0 Community Server     enabled:    31

Next, temporarily disable the AppStream repository and install the latest version of MySQL 8.0 from the MySQL community repository using the following command:

dnf --disablerepo=AppStream install mysql-community-server -y

After the installation is successfully completed, you can verify the installed version of MySQL using the following command:

mysql -Version

You should see the following output:

mysql  Ver 8.0.19 for Linux on x86_64 (MySQL Community Server - GPL)

Next, start the MySQL service and use the following command to start it after the system restarts:

systemctl start mysqld systemctl enable mysqld

You can also check the status of MySQL using:

systemctl status mysqld

You should see the following output:

? mysqld.service - MySQL Server
   Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled)
   Active: active (running) since Thu 2020-03-05 09:37:46 EST; 12s ago
     Docs: man:mysqld(8)
           http://dev.mysql.com/doc/refman/en/using-systemd.html
  Process: 3244 ExecStartPre=/usr/bin/mysqld_pre_systemd (code=exited, status=0/SUCCESS)
 Main PID: 3329 (mysqld)
   Status: "Server is operational"
    Tasks: 39 (limit: 12537)
   Memory: 587.7M
   CGroup: /system.slice/mysqld.service
           ??3329 /usr/sbin/mysqld

Mar 05 09:37:01 centos8 systemd[1]: Starting MySQL Server...
Mar 05 09:37:46 centos8 systemd[1]: Started MySQL Server.

Next, it is always a good idea to run the mysql_secure_installation script to enable some additional security features, including setting a new MySQL root password, removing anonymous users, and disabling remote logins.

First, find the default MySQL root password using:

cat /var/log/mysqld.log | grep -i 'temporary password'

Output:

2020-03-05T14:37:40.273796Z 5 [Note] [MY-010454] [Server] A temporary password is generated for [email protected]: GN2uNx-vPqwS

Note the password above and change it using the mysql_secure_installation script.

mysql_secure_installation

Answer all questions as follows:

Securing the MySQL server deployment.

Enter password for user root:   Provide your temporary MySQL root password

The existing password for the user account root has expired. Please set a new password.

New password:   Provide new root password

Re-enter new password:   Re-enter new root password
The 'validate_password' component is installed on the server.
The subsequent steps will run with the existing configuration
of the component.
Using existing password for root.

Estimated strength of the password: 100 
Change the password for root ? ((Press y|Y for Yes, any other key for No) : N  Type N and Enter to continue

 ... skipping.
By default, a MySQL installation has an anonymous user,
allowing anyone to log into MySQL without having to have
a user account created for them. This is intended only for
testing, and to make the installation go a bit smoother.
You should remove them before moving into a production
environment.

Remove anonymous users? (Press y|Y for Yes, any other key for No) : Y
Success.


Normally, root should only be allowed to connect from
'localhost'. This ensures that someone cannot guess at
the root password from the network.

Disallow root login remotely? (Press y|Y for Yes, any other key for No) : Y
Success.

By default, MySQL comes with a database named 'test' that
anyone can access. This is also intended only for testing,
and should be removed before moving into a production
environment.


Remove test database and access to it? (Press y|Y for Yes, any other key for No) : Y
 - Dropping test database...
Success.

 - Removing privileges on test database...
Success.

Reloading the privilege tables will ensure that all changes
made so far will take effect immediately.

Reload privilege tables now? (Press y|Y for Yes, any other key for No) : Y
Success.

All done!

Install MySQL 8.0 from the AppStream repository

You can also install MySQL 8.0 from the default AppStream repository on CentOS 8. You can use the following command to install:

dnf install @mysql -y

After the installation is complete, use the following command to check the version of MySQL:

mysql -Version

You should see the following output:

mysql  Ver 8.0.17 for Linux on x86_64 (Source distribution)

Next, start the MySQL service and use the following command to start it after the system restarts:

systemctl start mysqld systemctl enable mysqld

By default, the MySQL root password is not set in CentoS 8. Therefore, you will need to set it up using the mysql_secure_installation script.

mysql_secure_installation

Answer all questions as follows:

Securing the MySQL server deployment.

Connecting to MySQL using a blank password.

VALIDATE PASSWORD COMPONENT can be used to test passwords
and improve security. It checks the strength of password
and allows the users to set only those passwords which are
secure enough. Would you like to setup VALIDATE PASSWORD component?

Press y|Y for Yes, any other key for No: Y

There are three levels of password validation policy:

LOW    Length >= 8
MEDIUM Length >= 8, numeric, mixed case, and special characters
STRONG Length >= 8, numeric, mixed case, special characters and dictionary                  file

Please enter 0 = LOW, 1 = MEDIUM and 2 = STRONG: 0
Please set the password for root here.

New password: 

Re-enter new password: 

Estimated strength of the password: 100 
Do you wish to continue with the password provided?(Press y|Y for Yes, any other key for No) : Y
By default, a MySQL installation has an anonymous user,
allowing anyone to log into MySQL without having to have
a user account created for them. This is intended only for
testing, and to make the installation go a bit smoother.
You should remove them before moving into a production
environment.

Remove anonymous users? (Press y|Y for Yes, any other key for No) : Y
Success.


Normally, root should only be allowed to connect from
'localhost'. This ensures that someone cannot guess at
the root password from the network.

Disallow root login remotely? (Press y|Y for Yes, any other key for No) : Y
Success.

By default, MySQL comes with a database named 'test' that
anyone can access. This is also intended only for testing,
and should be removed before moving into a production
environment.


Remove test database and access to it? (Press y|Y for Yes, any other key for No) : Y
 - Dropping test database...
Success.

 - Removing privileges on test database...
Success.

Reloading the privilege tables will ensure that all changes
made so far will take effect immediately.

Reload privilege tables now? (Press y|Y for Yes, any other key for No) : Y
Success.

All done! 

in conclusion

In the above guide, you learned how to install MySQL8 from the MySQL community repository and the AppStream repository on CentOS 8. You can now start creating new databases and database users.

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