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Quickstart: Set up an Azure Kubernetes Service host on Azure Stack HCI and Windows Server and deploy a workload cluster using PowerShell

  • Article
  • 8 minutes to read

Applies to: Azure Stack HCI or Windows Server Datacenter

In this quickstart, you'll learn the setup for an Azure Kubernetes Service (AKS) host. You will create AKS on Azure Stack HCI and Windows Server clusters using PowerShell. To use Windows Admin Center instead, see Set up with Windows Admin Center.

Note

Before you begin

  • Make sure you have satisfied all the prerequisites on the system requirements page.
  • Use an Azure account to register your AKS host for billing. For more information, visit Azure requirements.

Install the AksHci PowerShell module

Follow these steps on all nodes in your Azure Stack HCI cluster or Windows Server cluster:

Note

If you are using remote PowerShell, you must use CredSSP.

  1. Close all open PowerShell windows, open a new PowerShell session as administrator, and run the following command on all nodes in your Azure Stack HCI or Windows Server cluster:

    Install-PackageProvider -Name NuGet -Force 
Install-Module -Name PowershellGet -Force -Confirm:$false -SkipPublisherCheck

    You must close all existing PowerShell windows again to ensure that loaded modules are refreshed. Do not continue to the next step until you have closed all open PowerShell windows.

  2. Install the AKS-HCI PowerShell module by running the following command on all nodes in your Azure Stack HCI or Windows Server cluster:

    Install-Module -Name AksHci -Repository PSGallery -Force -AcceptLicense

    You must close all existing PowerShell windows again to ensure that loaded modules are refreshed. Do not continue to the next step until you have closed all open PowerShell windows.

You can use a helper script to delete old AKS-HCI PowerShell modules, to avoid any PowerShell version-related issues in your AKS deployment.

Validate your installation

Get-Command -Module AksHci

To view the complete list of AksHci PowerShell commands, see AksHci PowerShell.

Register the resource provider to your subscription

Before the registration process, you need to enable the appropriate resource provider in Azure for AKS on Azure Stack HCI and Windows Server registration. To do that, run the following PowerShell commands.

To log in to Azure, run the Connect-AzAccount PowerShell command:

Connect-AzAccount

If you want to switch to a different subscription, run the Set-AzContext PowerShell command:

Set-AzContext -Subscription "xxxx-xxxx-xxxx-xxxx"

Run the following command to register your Azure subscription to Azure Arc enabled Kubernetes resource providers. This registration process can take up to 10 minutes, but it only needs to be performed once on a specific subscription.

Register-AzResourceProvider -ProviderNamespace Microsoft.Kubernetes
Register-AzResourceProvider -ProviderNamespace Microsoft.KubernetesConfiguration

To validate the registration process, run the following PowerShell command:

Get-AzResourceProvider -ProviderNamespace Microsoft.Kubernetes
Get-AzResourceProvider -ProviderNamespace Microsoft.KubernetesConfiguration

Step 1: Prepare your machine(s) for deployment

Run checks on every physical node to see if all the requirements are satisfied to install AKS on Azure Stack HCI and Windows Server. Open PowerShell as an administrator and run the following Initialize-AksHciNode command. Run the following command on all nodes in your Azure Stack HCI and Windows Server cluster.

Initialize-AksHciNode

Step 2: Create a virtual network

Run the following commands in step 2 on any one node in your Azure Stack HCI and Windows Server cluster.

To get the names of your available switches, run the following command. Make sure the SwitchType of your VM switch is "External".

Get-VMSwitch

Sample Output:

Name        SwitchType     NetAdapterInterfaceDescription
----        ----------     ------------------------------
extSwitch   External       Mellanox ConnectX-3 Pro Ethernet Adapter

To create a virtual network for the nodes in your deployment to use, create an environment variable with the New-AksHciNetworkSetting PowerShell command. This will be used later to configure a deployment that uses static IP. If you want to configure your AKS deployment with DHCP, visit New-AksHciNetworkSetting for examples. You can also review some networking node concepts.

#static IP
$vnet = New-AksHciNetworkSetting -name myvnet -vSwitchName "extSwitch" -k8sNodeIpPoolStart "172.16.10.1" -k8sNodeIpPoolEnd "172.16.10.255" -vipPoolStart "172.16.255.0" -vipPoolEnd "172.16.255.254" -ipAddressPrefix "172.16.0.0/16" -gateway "172.16.0.1" -dnsServers "172.16.0.1" -vlanId 9

Note

The values given in this example command will need to be customized for your environment.

Step 3: Configure your deployment

Run the following commands in step 3 on any one node in your Azure Stack HCI and Windows Server cluster.

To create the configuration settings for the AKS host, use the Set-AksHciConfig command. You must specify the imageDir, workingDir, and cloudConfigLocation parameters. If you want to reset your configuration details, run the command again with new parameters.

Configure your deployment with the following command.

Set-AksHciConfig -imageDir c:\clusterstorage\volume1\Images -workingDir c:\ClusterStorage\Volume1\ImageStore -cloudConfigLocation c:\clusterstorage\volume1\Config -vnet $vnet -cloudservicecidr "172.16.10.10/16"

Note

The values given in this example command will need to be customized for your environment.

Step 4: Log in to Azure and configure registration settings

Option 1: Using your Azure AD account if you have "Owner" permissions

Run the following Set-AksHciRegistration PowerShell command with your subscription and resource group name to log into Azure. You must have an Azure subscription, and an existing Azure resource group in the Australia East, East US, Southeast Asia, or West Europe Azure regions to proceed.

Set-AksHciRegistration -subscriptionId "<subscriptionId>" -resourceGroupName "<resourceGroupName>"

Option 2: Using an Azure service principal

If you do not have access to a subscription on which you're an "Owner", you can register your AKS host to Azure for billing using a service principal. For more information about how to use a service principal, see register AKS on Azure Stack HCI and Windows Server using a service principal.

Step 5: Start a new deployment

Run the following command in step 5 on any one node in your Azure Stack HCI or Windows Server cluster.

After you've configured your deployment, you must start it in order to install the AKS on Azure Stack HCI and Windows Server agents/services and the AKS host. To begin deployment, run the following command.

Tip

To see additional status detail during installation, set $VerbosePreference = "Continue" before proceeding.

Install-AksHci

Warning

During installation of your Azure Kuberenetes Service host, a Kubernetes - Azure Arc resource type is created in the resource group that's set during registration. Do not delete this resource as it represents your Azure Kuberenetes Service host. You can identify the resource by checking its distribution field for a value of aks_management. Deleting this resource will result in an out-of-policy deployment.

Step 6: Create a Kubernetes cluster

After installing your AKS host, you can deploy a Kubernetes cluster. Open PowerShell as an administrator and run the following New-AksHciCluster command. This example command will create a new Kubernetes cluster with one Linux node pool named linuxnodepool with a node count of 1.

To read more information about node pools, visit Use node pools in AKS on Azure Stack HCI and Windows Server.

New-AksHciCluster -name mycluster -nodePoolName linuxnodepool -nodeCount 1 -osType Linux

Check your deployed clusters

To get a list of your deployed Kubernetes clusters, run the following Get-AksHciCluster PowerShell command.

Get-AksHciCluster

Output

ProvisioningState     : provisioned
KubernetesVersion     : v1.20.7
NodePools             : linuxnodepool
WindowsNodeCount      : 0
LinuxNodeCount        : 0
ControlPlaneNodeCount : 1
Name                  : mycluster

To get a list of the node pools in the cluster, run the following Get-AksHciNodePool PowerShell command.

Get-AksHciNodePool -clusterName mycluster

ClusterName  : mycluster
NodePoolName : linuxnodepool
Version      : v1.20.7
OsType       : Linux
NodeCount    : 1
VmSize       : Standard_K8S3_v1
Phase        : Deployed

Step 7: Connect your cluster to Arc enabled Kubernetes

Connect your cluster to Arc enabled Kubernetes by running the Enable-AksHciArcConnection command. The below example connects your AKS on Azure Stack HCI and Windows Server cluster to Arc using the subscription and resource group details you passed in the Set-AksHciRegistration command.

Connect-AzAccount
Enable-AksHciArcConnection -name mycluster

Note

If you encounter issues or error messages during the installation process, see installation known issues and errors for more information.

Scale a Kubernetes cluster

If you need to scale your cluster up or down, you can change the number of control plane nodes by using the Set-AksHciCluster command. To change the number of Linux or Windows worker nodes in your node pool, use the Set-AksHciNodePool command.

To scale control plane nodes, run the following command:

Set-AksHciCluster -name mycluster -controlPlaneNodeCount 3

To scale the worker nodes in your node pool, run the following command:

Set-AksHciNodePool -clusterName mycluster -name linuxnodepool -count 3

Note

In previous versions of AKS on Azure Stack HCI and Windows Server, the Set-AksHciCluster command was also used to scale worker nodes. Now that AKS on Azure Stack HCI and Windows Server is introducing node pools in workload clusters, you can only use this command to scale worker nodes -- if your cluster was created with the old parameter set in New-AksHciCluster.

To scale worker nodes in a node pool, use the Set-AksHciNodePool command.

Access your clusters using kubectl

To access your Kubernetes clusters using kubectl, run the Get-AksHciCredential PowerShell command. This will use the specified cluster's kubeconfig file as the default kubeconfig file for kubectl. You can also use kubectl to deploy applications using Helm.

Get-AksHciCredential -name mycluster

Delete a Kubernetes cluster

If you need to delete a Kubernetes cluster, run the following command.

Remove-AksHciCluster -name mycluster

Note

Make sure that your cluster is deleted by looking at the existing VMs in the Hyper-V Manager. If they are not deleted, then you can manually delete the VMs. Then, run the command Restart-Service wssdagent. This should be done on each node in the failover cluster.

Get logs

To get logs from your all your pods, run the Get-AksHciLogs command. This command will create an output zipped folder called akshcilogs.zip in your working directory. The full path to the akshcilogs.zip folder will be the output after running the command below.

Get-AksHciLogs

In this quickstart, you learned how to set up an AKS host and create AKS on Azure Stack HCI and Windows Server clusters using PowerShell. You also learned how to use PowerShell to scale a Kubernetes cluster and to access clusters with kubectl.

Next steps