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PerconaXtraDB Vertical Autoscaling
This guide will give an overview on how KubeDB Autoscaler operator autoscales the database storage using perconaxtradbautoscaler
crd.
Before You Begin
- You should be familiar with the following
KubeDB
concepts:
How Storage Autoscaling Works
The following diagram shows how KubeDB Autoscaler operator autoscales the resources of PerconaXtraDB
database components. Open the image in a new tab to see the enlarged version.
![Storage Autoscaling process of PerconaXtraDB](/docs/v2024.4.27/guides/percona-xtradb/autoscaler/storage/overview/images/pxas-storage.jpeg)
The Auto Scaling process consists of the following steps:
At first, a user creates a
PerconaXtraDB
Custom Resource (CR).KubeDB
Community operator watches thePerconaXtraDB
CR.When the operator finds a
PerconaXtraDB
CR, it creates required number ofStatefulSets
and related necessary stuff like secrets, services, etc.Each StatefulSet creates a Persistent Volume according to the Volume Claim Template provided in the statefulset configuration. This Persistent Volume will be expanded by the
KubeDB
Enterprise operator.Then, in order to set up storage autoscaling of the
PerconaXtraDB
database the user creates aPerconaXtraDBAutoscaler
CRO with desired configuration.KubeDB
Autoscaler operator watches thePerconaXtraDBAutoscaler
CRO.KubeDB
Autoscaler operator continuously watches persistent volumes of the databases to check if it exceeds the specified usage threshold.If the usage exceeds the specified usage threshold, then
KubeDB
Autoscaler operator creates aPerconaXtraDBOpsRequest
to expand the storage of the database.KubeDB
Enterprise operator watches thePerconaXtraDBOpsRequest
CRO.Then the
KubeDB
Enterprise operator will expand the storage of the database component as specified on thePerconaXtraDBOpsRequest
CRO.
In the next docs, we are going to show a step-by-step guide on Autoscaling storage of various PerconaXtraDB database components using PerconaXtraDBAutoscaler
CRD.