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Reconfiguring MySQL

This guide will give an overview on how KubeDB Enterprise operator reconfigures MySQL.

Before You Begin

How Reconfiguring MySQL Process Works

The following diagram shows how KubeDB Enterprise operator reconfigures MySQL database components. Open the image in a new tab to see the enlarged version.

  Reconfiguring process of MySQL
Fig: Reconfiguring process of MySQL

The Reconfiguring MySQL process consists of the following steps:

  1. At first, a user creates a MySQL Custom Resource (CR).

  2. KubeDB Community operator watches the MySQL CR.

  3. When the operator finds a MySQL CR, it creates required number of StatefulSets and related necessary stuff like secrets, services, etc.

  4. Then, in order to reconfigure the MySQL standalone or cluster the user creates a MySQLOpsRequest CR with desired information.

  5. KubeDB Enterprise operator watches the MySQLOpsRequest CR.

  6. When it finds a MySQLOpsRequest CR, it halts the MySQL object which is referred from the MySQLOpsRequest. So, the KubeDB Community operator doesn’t perform any operations on the MySQL object during the reconfiguring process.

  7. Then the KubeDB Enterprise operator will replace the existing configuration with the new configuration provided or merge the new configuration with the existing configuration according to the MySQLOpsRequest CR.

  8. Then the KubeDB Enterprise operator will restart the related StatefulSet Pods so that they restart with the new configuration defined in the MySQLOpsRequest CR.

  9. After the successful reconfiguring of the MySQL, the KubeDB Enterprise operator resumes the MySQL object so that the KubeDB Community operator resumes its usual operations.

In the next docs, we are going to show a step by step guide on reconfiguring MySQL database components using MySQLOpsRequest CRD.