Upgrading from MySQL 5.7 to MySQL 8

• Open a terminal window with the user root and enter the following command:

mysql --version

You will get an answer similar to the following:

mysql  Ver 14.14 Distrib 5.7.33, for Linux (x86_64) using EditLine wrapper

• Perform a database (hereinafter < pandora_itsm_db_name >) data backup procedure.

• Stop the Apache web server:

systemctl stop httpd.service

Or:

/etc/init.d/httpd stop

• Make a special database backup that is compatible with MySQL 8:

mysqldump -u root -p < pandora_itsm_db_name > \
  --skip-add-drop-table \
  --complete-insert \
  --no-create-info> backup_pandora_itsm.sql

• Make a backup as it is done in MySQL 5.7 (additional insurance if you have to go back to this version):

mysqldump -u root -p < pandora_itsm_db_name > > backup_pandora_itsm_5.7.sql

• Backup MySQL configuration file (my.cnf):

cp /etc/my.cnf /tmp/my.cnf.BACK

• Delete Percona 5 repositories:

rpm -qa | grep Percona-Server | xargs rpm -e --nodeps

• Install Percona 8 repositories:

dnf install https://repo.percona.com/yum/percona-release-latest.noarch.rpm -y

• Enable the repositories from the previous step:

percona-release setup ps80

• Instalar Percona 8

dnf install percona-server-server

• Restore the file my.cnf:

mv /tmp/my.cnf.BACK /etc/my.cnf

• Modify the my.cnf file to eliminate query_cache_*:

sed -i -e "s/^query_cache_type.*/#query_cache_type/g" /etc/my.cnf
sed -i -e "s/^query_cache_size.*/#query_cache_size/g" /etc/my.cnf
sed -i -e "s/^query_cache_min_res_unit.*/#query_cache_min_res_unit/g" /etc/my.cnf
sed -i -e "s/^query_cache_limit.*/#query_cache_limit/g" /etc/my.cnf

• Start the MySQL service:

systemctl start mysql

Or:

service mysqld start

• Verify the version installed with:

mysql --version

You will get an answer similar to the following:

mysql  Ver 8.0.28-19 for Linux on x86_64 (Percona Server (GPL), Release 19, Revision 31e88966cd3)

Use MySQL's own command line:

• Delete the < pandora_itsm_db_name > database.
• Create a new database < pandora_itsm_db_name >.
• Open the < pandora_itsm_db_name > database and import the schema found in the PFMS Web Console.
• Import the data found in the special MySQL 8 compatible backup.

mysql -u root -p < pandora_itsm_db_name >

DROP DATABASE < pandora_itsm_db_name >;
CREATE DATABASE < pandora_itsm_db_name >;
USE < pandora_itsm_db_name >;
SOURCE /var/www/html/pandoraitsm/integria_db.sql;
SOURCE backup_pandora_itsm.sql;

• The necessary permissions (grants) must be added again; if you are not logged in to mysql as user root (replace < password > with the corresponding password) run:

mysql -uroot -p < password >

• Once logged in as root, execute the following commands:
• Disable the plugin validation of password (optional).

UNINSTALL COMPONENT 'file://component_validate_password';

• If it does not exist, create the login user:

CREATE USER "<DBUSER>"@'%' IDENTIFIED BY "<DBPASS>";

• Assign the native password for mysql:

ALTER USER "<DBUSER>"@'%' IDENTIFIED WITH mysql_native_password BY "<DBPASS>";

• Granting grants on the Pandora ITSM database (< pandora_itsm_db_name >):

GRANT ALL PRIVILEGES ON < pandora_itsm_db_name >.* TO "<DBUSER>"@'%';

• Save changes and exit:

FLUSH privileges;
exit

Once you have finished working with the database, perform the following steps:

• Start the Apache web server:

systemctl start httpd.service

Or:

/etc/init.d/httpd start

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