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HPA

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loganhz
2019-06-04 22:49:00 +08:00
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content/rancher/v2.x/en/k8s-in-rancher/horitzontal-pod-autoscaler/_index.md
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Using the Kubernetes [Horizontal Pod Autoscaler](https://kubernetes.io/docs/tasks/run-application/horizontal-pod-autoscale/) feature (HPA), you can configure your cluster to automatically scale the services it's running up or down.
>**Note:** Clusters created in Rancher v2.0.7 and higher have all the requirements needed (metrics-server and Kubernetes cluster configuration) to use Horizontal Pod Autoscaler.
>**Note:**
>
>- Clusters created in Rancher v2.0.7 and higher have all the requirements needed (metrics-server and Kubernetes cluster configuration) to use Horizontal Pod Autoscaler.
>- You can create, manage, and delete HPAs using Rancher UI in Rancher v2.3.0-alpha and higher version. It only supports HPA in `autoscaling/v2beta2` API.
### Why Use Horizontal Pod Autoscaler?
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For more information about the HPA API object, see the [HPA GitHub Readme](https://git.k8s.io/community/contributors/design-proposals/autoscaling/horizontal-pod-autoscaler.md#horizontalpodautoscaler-object).
### Rancher UI
You can create, manage, and delete HPAs using Rancher UI:
#### Creating a HPA
1. From the **Global** view, open the project that you want to deploy a HPA to.
1. Select **Workloads** in the navigation bar and then select the **HPA** tab.
1. Click **Add HPA**
1. Enter a **Name** for the HPA.
1. Select a **Namespace** for the HPA.
1. Select a **Deployment** as scale target for the HPA.
1. Specify the **Minimum Scale** and **Maximum Scale** for the HPA.
1. Configure the metrics for the HPA
1. Click **Create** to create the HPA
**Result:** The HPA is deployed to the chosen namespace. You can view the HPA's status from the project's **Workloads** -> **HPA** view.
#### Getting HPA info
1. From the **Global** view, open the project that you want to deploy a HPA to.
1. Select **Workloads** in the navigation bar and then select the **HPA** tab.
1. Find the HPA which you would like to view info
1. Click the name of the HPA
1. You can view the HPA info in the HPA detail page
#### Deleting HPA
1. From the **Global** view, open the project that you want to deploy a HPA to.
1. Select **Workloads** in the navigation bar and then select the **HPA** tab.
1. Find the HPA which you would like to delete
1. Click **Ellipsis (...) > Delete**.
1. Click **Delete** to confim.
**Result:** The HPA is deleted from current cluster.
### kubectl Commands
You can create, manage, and delete HPAs using kubectl: