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PerconaXtraDB Volume Expansion
This guide will give an overview on how KubeDB Ops Manager expand the volume of PerconaXtraDB
.
Before You Begin
- You should be familiar with the following
KubeDB
concepts:
How Volume Expansion Process Works
The following diagram shows how KubeDB Ops Manager expand the volumes of PerconaXtraDB
database components. Open the image in a new tab to see the enlarged version.
![Volume Expansion process of PerconaXtraDB](/docs/v2024.4.27/guides/percona-xtradb/volume-expansion/overview/images/volume-expansion.jpeg)
The Volume Expansion 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 requiredStatefulSet
and related necessary stuff like secrets, services, etc.The statefulSet creates Persistent Volumes 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 expand the volume of the
PerconaXtraDB
database the user creates aPerconaXtraDBOpsRequest
CR with desired information.KubeDB
Enterprise operator watches thePerconaXtraDBOpsRequest
CR.When it finds a
PerconaXtraDBOpsRequest
CR, it pauses thePerconaXtraDB
object which is referred from thePerconaXtraDBOpsRequest
. So, theKubeDB
Community operator doesn’t perform any operations on thePerconaXtraDB
object during the volume expansion process.Then the
KubeDB
Enterprise operator will expand the persistent volume to reach the expected size defined in thePerconaXtraDBOpsRequest
CR.After the successfully expansion of the volume of the related StatefulSet Pods, the
KubeDB
Enterprise operator updates the new volume size in thePerconaXtraDB
object to reflect the updated state.After the successful Volume Expansion of the
PerconaXtraDB
, theKubeDB
Enterprise operator resumes thePerconaXtraDB
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 Volume Expansion of various PerconaXtraDB database using PerconaXtraDBOpsRequest
CRD.