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Chapter 8. Stop the MariaDB Service and Prepare the Directories

The procedure requires stopping the MariaDB service and making a copy of the directories in case of data directory corruption. The copy of the directories is useful for root-cause-analysis investigation. Perform the following procedure on ALL nodes.

Procedure

  1. Stop the MariaDB service on ALL controller nodes. 

    [root@overcloud-controller-0] mysqladmin -u root shutdown
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  2. Move the existing mariadb data directories and prepare new data directories on ALL controller nodes. 

    [root@overcloud-controller-0] mv /var/lib/mysql /var/lib/mysql-save
[root@overcloud-controller-0] mkdir /var/lib/mysql
[root@overcloud-controller-0] chown mysql:mysql /var/lib/mysql
[root@overcloud-controller-0] chmod 0755 /var/lib/mysql
[root@overcloud-controller-0] mysql_install_db --datadir=/var/lib/mysql --user=mysql
[root@overcloud-controller-0] chown -R mysql:mysql /var/lib/mysql/
[root@overcloud-controller-0] restorecon -R /var/lib/mysql
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