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‎articles/aks/start-stop-nodepools.md

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title: Start and stop a node pool on Azure Kubernetes Service (AKS)
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description: Learn how to start or stop a node pool on Azure Kubernetes Service (AKS).
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ms.topic: article
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ms.date: 10/25/2021
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ms.date: 04/25/2023
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author: qpetraroia
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ms.author: qpetraroia
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---
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# Start and stop an Azure Kubernetes Service (AKS) node pool
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Your AKS workloads may not need to run continuously, for example a development cluster that has node pools running specific workloads. To optimize your costs, you can completely turn off (stop) your node pools in your AKS cluster, allowing you to save on compute costs.
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You might not need to continuously run your AKS workloads. For example, you might have a development cluster that has node pools running specific workloads. To optimize your compute costs, you can completely stop your node pools in your AKS cluster.
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## Features and limitations
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* You can't stop system pools.
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* Spot node pools are supported.
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* Stopped node pools can be upgraded.
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* The cluster and node pool must be running.
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## Before you begin
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This article assumes that you have an existing AKS cluster. If you need an AKS cluster, see the AKS quickstart [using the Azure CLI][aks-quickstart-cli], [using Azure PowerShell][aks-quickstart-powershell], or [using the Azure portal][aks-quickstart-portal].
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This article assumes you have an existing AKS cluster. If you need an AKS cluster, create one using the [Azure CLI][aks-quickstart-cli], [Azure PowerShell][aks-quickstart-powershell], or the [Azure portal][aks-quickstart-portal].
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## Stop an AKS node pool
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> [!IMPORTANT]
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> When using node pool start/stop, the following is expected behavior:
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>
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> * You can't stop system pools.
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> * Spot node pools are supported.
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> * Stopped node pools can be upgraded.
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> * The cluster and node pool must be running.
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Use `az aks nodepool stop` to stop a running AKS node pool. The following example stops the *testnodepool* node pool:
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```azurecli-interactive
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az aks nodepool stop --nodepool-name testnodepool --resource-group myResourceGroup --cluster-name myAKSCluster
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```
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You can verify when your node pool is stopped by using the [az aks show][az-aks-show] command and confirming the `powerState` shows as `Stopped` as on the below output:
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```json
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{
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[...]
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"osType": "Linux",
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"podSubnetId": null,
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"powerState": {
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"code": "Stopped"
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},
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"provisioningState": "Succeeded",
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"proximityPlacementGroupId": null,
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[...]
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}
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```
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> [!NOTE]
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> If the `provisioningState` shows `Stopping`, your node pool hasn't fully stopped yet.
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1. Stop a running AKS node pool using the [`az aks nodepool stop`][az-aks-nodepool-stop] command.
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```azurecli-interactive
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az aks nodepool stop --resource-group myResourceGroup --cluster-name myAKSCluster --nodepool-name testnodepool
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```
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2. Verify your node pool stopped using the [`az aks nodepool show`][az-aks-nodepool-show] command.
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```azurecli-interactive
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az aks nodepool show --resource-group myResourceGroup --cluster-name myAKSCluster --nodepool-name testnodepool
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```
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The following condensed example output shows the `powerState` as `Stopped`:
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```output
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{
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[...]
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"osType": "Linux",
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"podSubnetId": null,
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"powerState": {
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"code": "Stopped"
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},
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"provisioningState": "Succeeded",
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"proximityPlacementGroupId": null,
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[...]
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}
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```
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> [!NOTE]
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> If the `provisioningState` shows `Stopping`, your node pool is still in the process of stopping.
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---
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## Start a stopped AKS node pool
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Use `az aks nodepool start` to start a stopped AKS node pool. The following example starts the stopped node pool named *testnodepool*:
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1. Restart a stopped node pool using the [`az aks nodepool start`][az-aks-nodepool-start] command.
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```azurecli-interactive
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az aks nodepool start --nodepool-name testnodepool --resource-group myResourceGroup --cluster-name myAKSCluster
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```
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```azurecli-interactive
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az aks nodepool start --resource-group myResourceGroup --cluster-name myAKSCluster --nodepool-name testnodepool
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```
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You can verify your node pool has started using [az aks show][az-aks-show] and confirming the `powerState` shows `Running`. For example:
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2. Verify your node pool started using the [`az aks nodepool show`][az-aks-nodepool-show] command.
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```json
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{
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[...]
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"osType": "Linux",
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"podSubnetId": null,
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"powerState": {
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"code": "Running"
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},
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"provisioningState": "Succeeded",
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"proximityPlacementGroupId": null,
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[...]
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}
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```
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```azurecli-interactive
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az aks nodepool show --resource-group myResourceGroup --cluster-name myAKSCluster --nodepool-name testnodepool
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```
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> [!NOTE]
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> If the `provisioningState` shows `Starting`, your node pool hasn't fully started yet.
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The following condensed example output shows the `powerState` as `Running`:
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```output
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{
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[...]
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"osType": "Linux",
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"podSubnetId": null,
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"powerState": {
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"code": "Running"
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},
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"provisioningState": "Succeeded",
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"proximityPlacementGroupId": null,
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[...]
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}
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```
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> [!NOTE]
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> If the `provisioningState` shows `Starting`, your node pool is still in the process of starting.
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---
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## Next steps
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- To learn how to scale `User` pools to 0, see [Scale `User` pools to 0](scale-cluster.md#scale-user-node-pools-to-0).
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- To learn how to stop your cluster, see [Cluster start/stop](start-stop-cluster.md).
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- To learn how to save costs using Spot instances, see [Add a spot node pool to AKS](spot-node-pool.md).
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- To learn more about the AKS support policies, see [AKS support policies](support-policies.md).
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<!-- LINKS - external -->
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* To learn how to scale `User` pools to 0, see [scale `User` pools to 0](scale-cluster.md#scale-user-node-pools-to-0).
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* To learn how to stop your cluster, see [cluster start/stop](start-stop-cluster.md).
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* To learn how to save costs using Spot instances, see [add a spot node pool to AKS](spot-node-pool.md).
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* To learn more about the AKS support policies, see [AKS support policies](support-policies.md).
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<!-- LINKS - internal -->
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[aks-quickstart-cli]: ./learn/quick-kubernetes-deploy-cli.md
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[aks-quickstart-portal]: ./learn/quick-kubernetes-deploy-portal.md
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[aks-quickstart-powershell]: ./learn/quick-kubernetes-deploy-powershell.md
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[install-azure-cli]: /cli/azure/install-azure-cli
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[az-extension-add]: /cli/azure/extension#az_extension_add
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[az-extension-update]: /cli/azure/extension#az_extension_update
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[az-feature-register]: /cli/azure/feature#az_feature_register
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[az-feature-list]: /cli/azure/feature#az_feature_list
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[az-provider-register]: /cli/azure/provider#az_provider_register
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[az-aks-show]: /cli/azure/aks#az_aks_show
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[kubernetes-walkthrough-powershell]: kubernetes-walkthrough-powershell.md
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[stop-azakscluster]: /powershell/module/az.aks/stop-azakscluster
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[get-azakscluster]: /powershell/module/az.aks/get-azakscluster
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[start-azakscluster]: /powershell/module/az.aks/start-azakscluster
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[az-aks-nodepool-stop]: /cli/azure/aks/nodepool#az_aks_nodepool_stop
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[az-aks-nodepool-start]:/cli/azure/aks/nodepool#az_aks_nodepool_start
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[az-aks-nodepool-show]: /cli/azure/aks/nodepool#az_aks_nodepool_show

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