Enable Azure VM extensions using Azure PowerShell

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This article shows you how to deploy, update, and uninstall Azure VM extensions, supported by Azure Arc-enabled servers, to a Linux or Windows hybrid machine using Azure PowerShell.

Note

Azure Arc-enabled servers does not support deploying and managing VM extensions to Azure virtual machines. For Azure VMs, see the following VM extension overview article.

Prerequisites

Before using Azure PowerShell to manage VM extensions on your hybrid server managed by Azure Arc-enabled servers, you need to install the Az.ConnectedMachine module. These management operations can be performed from your workstation, you don't need to run them on the Azure Arc-enabled server.

Run the following command on your Azure Arc-enabled server:

Install-Module -Name Az.ConnectedMachine.

When the installation completes, the following message is returned:

The installed extension 'Az.ConnectedMachine' is experimental and not covered by customer support. Please use with discretion.

Enable extension

To enable a VM extension on your Azure Arc-enabled server, use New-AzConnectedMachineExtension with the -Name, -ResourceGroupName, -MachineName, -Location, -Publisher, -ExtensionType, and -Settings parameters.

The following example enables the Log Analytics VM extension on a Azure Arc-enabled Linux server:

$Setting = @{ "workspaceId" = "workspaceId" }
$protectedSetting = @{ "workspaceKey" = "workspaceKey" }
New-AzConnectedMachineExtension -Name OMSLinuxAgent -ResourceGroupName "myResourceGroup" -MachineName "myMachineName" -Location "regionName" -Publisher "Microsoft.EnterpriseCloud.Monitoring" -Settings $Setting -ProtectedSetting $protectedSetting -ExtensionType "OmsAgentForLinux"

To enable the Log Analytics VM extension on an Azure Arc-enabled Windows server, change the value for the -ExtensionType parameter to "MicrosoftMonitoringAgent" in the previous example.

The following example enables the Custom Script Extension on an Azure Arc-enabled server:

$Setting = @{ "commandToExecute" = "powershell.exe -c Get-Process" }
New-AzConnectedMachineExtension -Name "custom" -ResourceGroupName "myResourceGroup" -MachineName "myMachineName" -Location "regionName" -Publisher "Microsoft.Compute"  -Settings $Setting -ExtensionType CustomScriptExtension

The following example enables the Microsoft Antimalware extension on an Azure Arc-enabled Windows server:

$Setting = @{ "AntimalwareEnabled" = $true }
New-AzConnectedMachineExtension -Name "IaaSAntimalware" -ResourceGroupName "myResourceGroup" -MachineName "myMachineName" -Location "regionName" -Publisher "Microsoft.Azure.Security" -Settings $Setting -ExtensionType "IaaSAntimalware"

Key Vault VM extension

Warning

Adding \ to " in the settings.json will cause akvvm_service to fail with the following error: [CertificateManagementConfiguration] Failed to parse the configuration settings with:not an object.

While Powershell users commonly use the \" sequence to escape quotation marks in other code blocks, you'll want to avoid that formatting in the settings.json file.

The following example enables the Key Vault VM extension on an Azure Arc-enabled server:

# Build settings
    $settings = @{
      secretsManagementSettings = @{
       observedCertificates = @(
        "observedCert1"
       )
      certificateStoreLocation = "myMachineName" # For Linux use "/var/lib/waagent/Microsoft.Azure.KeyVault.Store/"
      certificateStore = "myCertificateStoreName"
      pollingIntervalInS = "pollingInterval"
      }
    authenticationSettings = @{
     msiEndpoint = "http://localhost:40342/metadata/identity"
     }
    }

    $resourceGroup = "resourceGroupName"
    $machineName = "myMachineName"
    $location = "regionName"

    # Start the deployment
    New-AzConnectedMachineExtension -ResourceGroupName $resourceGroup -Location $location -MachineName $machineName -Name "KeyVaultForWindows or KeyVaultforLinux" -Publisher "Microsoft.Azure.KeyVault" -ExtensionType "KeyVaultforWindows or KeyVaultforLinux" -Setting $settings

Datadog VM extension

The following example enables the Datadog VM extension on an Azure Arc-enabled server:

$resourceGroup = "resourceGroupName"
$machineName = "machineName"
$location = "machineRegion"
$osType = "Windows" # change to Linux if appropriate
$settings = @{
    # change to your preferred Datadog site
    site = "us3.datadoghq.com"
}
$protectedSettings = @{
    # change to your Datadog API key
    api_key = "APIKEY"
}

New-AzConnectedMachineExtension -ResourceGroupName $resourceGroup -Location $location -MachineName $machineName -Name "Datadog$($osType)Agent" -Publisher "Datadog.Agent" -ExtensionType "Datadog$($osType)Agent" -Setting $settings -ProtectedSetting $protectedSettings

List extensions installed

To get a list of the VM extensions on your Azure Arc-enabled server, use Get-AzConnectedMachineExtension with the -MachineName and -ResourceGroupName parameters.

Example:

Get-AzConnectedMachineExtension -ResourceGroupName myResourceGroup -MachineName myMachineName

Name    Location  PropertiesType        ProvisioningState
----    --------  --------------        -----------------
custom  westus2   CustomScriptExtension Succeeded

Update extension configuration

To reconfigure an installed extension, you can use the Update-AzConnectedMachineExtension cmdlet with the -Name, -MachineName, -ResourceGroupName, and -Settings parameters.

Refer to the reference article for the cmdlet to understand the different methods to provide the changes you want to the extension.

Upgrade extension

When a new version of a supported VM extension is released, you can upgrade it to that latest release. To upgrade a VM extension, use Update-AzConnectedExtension with the -MachineName, -ResourceGroupName, and -ExtensionTarget parameters.

For the -ExtensionTarget parameter, you need to specify the extension and the latest version available. To determine the latest version available for an extension, visit the Extensions page for the selected Arc-enabled server in the Azure portal or run Get-AzVMExtensionImage. You may specify multiple extensions in a single upgrade request by providing a comma-separated list of extensions, defined by their publisher and type (separated by a period) and the target version for each extension.

To upgrade the Log Analytics agent extension for Windows that has a newer version available, run the following command:

Update-AzConnectedExtension -MachineName "myMachineName" -ResourceGroupName "myResourceGroup" -ExtensionTarget '{\"Microsoft.EnterpriseCloud.Monitoring.MicrosoftMonitoringAgent\":{\"targetVersion\":\"1.0.18053.0\"}}'

You can review the version of installed VM extensions at any time by running the command Get-AzConnectedMachineExtension. The TypeHandlerVersion property value represents the version of the extension.

Remove extensions

To remove an installed VM extension on your Azure Arc-enabled server, use Remove-AzConnectedMachineExtension with the -Name, -MachineName and -ResourceGroupName parameters.

For example, to remove the Log Analytics VM extension for Linux, run the following command:

Remove-AzConnectedMachineExtension -MachineName myMachineName -ResourceGroupName myResourceGroup -Name OmsAgentforLinux

Next steps