Understand machine configuration assignment resources |
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Understand machine configuration assignment resources
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04/19/2023
Note Azure Policy Guest Configuration is now called Azure Automanage Machine Configuration. Learn more about the recent renaming of Microsoft configuration management services. When an Azure Policy is assigned, if it's in the category Guest Configuration there's metadata included to describe a guest assignment. A video walk-through of this document is available. You can think of a guest assignment as a link between a machine and an Azure Policy scenario. For example, the following snippet associates the Azure Windows Baseline configuration with minimum version 1.0.0 to any machines in scope of the policy. "metadata": { "category": "Guest Configuration", "guestConfiguration": { "name": "AzureWindowsBaseline", "version": "1.*" } //additional metadata properties exist } How Azure Policy uses machine configuration assignmentsThe machine configuration service uses the metadata information to automatically create an audit resource for definitions with either AuditIfNotExists or DeployIfNotExists policy effects. The resource type is Microsoft.GuestConfiguration/guestConfigurationAssignments. Azure Policy uses the complianceStatus property of the guest assignment resource to report compliance status. For more information, see getting compliance data. Deletion of guest assignments from Azure PolicyWhen an Azure Policy assignment is deleted, if the policy created a machine configuration assignment, the machine configuration assignment is also deleted. When an Azure Policy assignment is deleted, you need to manually delete any machine configuration assignments the policy created. You can do so by navigating to the guest assignments page on Azure portal and deleting the assignment there. Manually creating machine configuration assignmentsYou can create guest assignment resources in Azure Resource Manager by using Azure Policy or any client SDK. An example deployment template: { "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#", "contentVersion": "1.0.0.0", "resources": [ { "apiVersion": "2021-01-25", "type": "Microsoft.Compute/virtualMachines/providers/guestConfigurationAssignments", "name": "myMachine/Microsoft.GuestConfiguration/myConfig", "location": "westus2", "properties": { "guestConfiguration": { "name": "myConfig", "contentUri": "https://mystorageaccount.blob.core.windows.net/mystoragecontainer/myConfig.zip?sv=SASTOKEN", "contentHash": "SHA256HASH", "version": "1.0.0", "assignmentType": "ApplyAndMonitor", "configurationParameter": {} } } } ] }The following table describes each property of guest assignment resources. Property Description name Name of the configuration inside the content package MOF file. contentUri HTTPS URI path to the content package (.zip). contentHash A SHA256 hash value of the content package, used to verify it hasn't changed. version Version of the content package. Only used for built-in packages and not used for custom content packages. assignmentType Behavior of the assignment. Allowed values: Audit, ApplyandMonitor, and ApplyandAutoCorrect. configurationParameter List of DSC resource type, name, and value in the content package MOF file to be overridden after it's downloaded in the machine. Deletion of manually created machine configuration assignmentsYou must manually delete machine configuration assignments created through any manual approach (such as an Azure Resource Manager template deployment). Deleting the parent resource (virtual machine or Arc-enabled machine) also deletes the machine configuration assignment. To manually delete a machine configuration assignment, use the following example. Make sure to replace all example strings, indicated by brackets. # First get details about the machine configuration assignment $resourceDetails = @{ ResourceGroupName = '' ResourceType = 'Microsoft.Compute/virtualMachines/providers/guestConfigurationAssignments/' ResourceName = '/Microsoft.GuestConfiguration' ApiVersion = '2020-06-25' } $guestAssignment = Get-AzResource @resourceDetails # Review details of the machine configuration assignment $guestAssignment # After reviewing properties of $guestAssignment to confirm $guestAssignment | Remove-AzResource Next steps Read the machine configuration overview. Set up a custom machine configuration package development environment. Create a package artifact for machine configuration. Test the package artifact from your development environment. Use the GuestConfiguration module to create an Azure Policy definition for at-scale management of your environment. Assign your custom policy definition using Azure portal. Learn how to view compliance details for machine configuration policy assignments. |
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