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You are looking at the documentation of a prior release. To read the documentation of the latest release, please visit here.

New to KubeDB? Please start here.

updating MySQL version Overview

This guide will give you an overview of how KubeDB Ops Manager updates the version of MySQL database.

Before You Begin

How update Process Works

The following diagram shows how KubeDB Ops Manager used to update the version of MySQL. Open the image in a new tab to see the enlarged version.

Stash Backup Flow
Fig: updating Process of MySQL

The updating process consists of the following steps:

  1. At first, a user creates a MySQL cr.

  2. KubeDB community operator watches for the MySQL cr.

  3. When it finds one, it creates a StatefulSet and related necessary stuff like secret, service, etc.

  4. Then, in order to update the version of the MySQL database the user creates a MySQLOpsRequest cr with the desired version.

  5. KubeDB Ops Manager watches for MySQLOpsRequest.

  6. When it finds one, it halts the MySQL object so that the KubeDB community operator doesn’t perform any operation on the MySQL during the updating process.

  7. By looking at the target version from MySQLOpsRequest cr, KubeDB Ops Manager takes one of the following steps:

    • either update the images of the StatefulSet for updating between patch/minor versions.
    • or creates a new StatefulSet using targeted image for updating between major versions.

  8. After successful upgradation of the StatefulSet and its Pod images, the KubeDB Ops Manager updates the image of the MySQL object to reflect the updated cluster state.

  9. After successful upgradation of MySQL object, the KubeDB Ops Manager resumes the MySQL object so that the KubeDB community operator can resume its usual operations.

In the next doc, we are going to show a step by step guide on updating of a MySQL database using update operation.

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