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This guide will give an overview on how KubeDB Autoscaler operator autoscales the database storage using
The following diagram shows how KubeDB Autoscaler operator autoscales the resources of
MongoDB database components. Open the image in a new tab to see the enlarged version.
The Auto Scaling process consists of the following steps:
At first, a user creates a
MongoDB Custom Resource (CR).
KubeDB Community operator watches the
When the operator finds a
MongoDB CR, it creates required number of
StatefulSets 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 various components (ie. ReplicaSet, Shard, ConfigServer etc.) of the
MongoDB database the user creates a
MongoDBAutoscaler CRO with desired configuration.
KubeDB Autoscaler operator watches the
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 a
MongoDBOpsRequest to expand the storage of the database.
KubeDB Enterprise operator watches the
KubeDB Enterprise operator will expand the storage of the database component as specified on the
In the next docs, we are going to show a step by step guide on Autoscaling storage of various MongoDB database components using