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articles/aks/vertical-pod-autoscaler.md

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@@ -3,7 +3,7 @@ title: Vertical Pod Autoscaling (preview) in Azure Kubernetes Service (AKS)
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description: Learn how to vertically autoscale your pod on an Azure Kubernetes Service (AKS) cluster.
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services: container-service
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ms.topic: article
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ms.date: 09/29/2022
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ms.date: 09/30/2022
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---
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# Vertical Pod Autoscaling (preview) in Azure Kubernetes Service (AKS)
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* It analyzes and adjusts processor and memory resources to *right size* your applications. VPA is not only responsible for scaling up, but also for scaling down based on their resource use over time.
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* A Pod is evicted if it needs to change its resource requests based on if its scaling mode is set to *auto*
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* A Pod is evicted if it needs to change its resource requests based on if its scaling mode is set to *auto* or *recreate*.
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* Set CPU and memory constraints for individual containers by specifying a resource policy
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## Limitations
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* Vertical Pod autoscaling supports a maximum of 500 `VerticalPodAutoscaler` objects per cluster.
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* With this preview release, you cannot change the `controllerValue` and `updateMode` properties. While you can see them from the `managedCluster` object, they are reserved for future use.
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* With this preview release, you cannot change the `controlledValue` and `updateMode` VPA objects. While you can see them from the `managedCluster` object, they are reserved for future use.
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## Before you begin
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* Your AKS cluster is running Kubernetes version 1.22 and higher.
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* AKS cluster is running Kubernetes version 1.24 and higher.
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* The Azure CLI version 2.0.64 or later installed and configured. Run `az --version` to find the version. If you need to install or upgrade, see [Install Azure CLI][install-azure-cli].
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## Set Pod Autoscaler requests automatically
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Vertical Pod autoscaling uses the `VerticalPodAutoscaler` object to automatically set resource requests on Pods when the updateMode is set to **Auto**.
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Vertical Pod autoscaling uses the `VerticalPodAutoscaler` object to automatically set resource requests on Pods when the updateMode is set to **Auto** or **Recreate**.
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1. Enable VPA for your cluster by running the following command. Replace cluster name `myAKSCluster` with the name of your AKS cluster and replace `myResourceGroup` with the name of the resource group the cluster is hosted in.
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