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.
MariaDB Horizontal Scaling
This guide will give an overview on how KubeDB Enterprise operator scales up or down MariaDB Cluster
.
Before You Begin
- You should be familiar with the following
KubeDB
concepts:
How Horizontal Scaling Process Works
The following diagram shows how KubeDB Enterprise operator scales up or down MariaDB
database components. Open the image in a new tab to see the enlarged version.
![Horizontal scaling process of MariaDB](/docs/v2023.08.18/guides/mariadb/scaling/horizontal-scaling/overview/images/horizontal-scaling.jpg)
The Horizontal scaling process consists of the following steps:
At first, a user creates a
MariaDB
Custom Resource (CR).KubeDB
Community operator watches theMariaDB
CR.When the operator finds a
MariaDB
CR, it creates required number ofStatefulSets
and related necessary stuff like secrets, services, etc.Then, in order to scale the
MariaDB
database the user creates aMariaDBOpsRequest
CR with desired information.KubeDB
Enterprise operator watches theMariaDBOpsRequest
CR.When it finds a
MariaDBOpsRequest
CR, it pauses theMariaDB
object which is referred from theMariaDBOpsRequest
. So, theKubeDB
Community operator doesn’t perform any operations on theMariaDB
object during the horizontal scaling process.Then the
KubeDB
Enterprise operator will scale the related StatefulSet Pods to reach the expected number of replicas defined in theMariaDBOpsRequest
CR.After the successfully scaling the replicas of the StatefulSet Pods, the
KubeDB
Enterprise operator updates the number of replicas in theMariaDB
object to reflect the updated state.After the successful scaling of the
MariaDB
replicas, theKubeDB
Enterprise operator resumes theMariaDB
object so that theKubeDB
Community operator resumes its usual operations.
In the next docs, we are going to show a step by step guide on horizontal scaling of MariaDB database using MariaDBOpsRequest
CRD.