使用 Azure VM 映像生成器访问现有的 Azure 虚拟网络

Artículo
08/13/2024

适用于：✔️ Windows VM

本文介绍如何使用 Azure VM 映像生成器创建有权访问虚拟网络中现有资源的基本自定义 Windows 映像。创建的生成虚拟网络 (VM) 将部署到在订阅中指定的新的或现有虚拟网络。使用现有的 Azure 虚拟网络时，Azure VM 映像生成器不需要公共网络连接。

设置变量和访问权限

对于此任务，重复使用一些信息。请创建一些变量来存储这些信息。

# Step 1: Import module
Import-Module Az.Accounts

# Step 2: get existing context
$currentAzContext = Get-AzContext

# destination image resource group
$imageResourceGroup="aibImageRG"

# location (see possible locations in main docs)
$location="chinanorth3"

## if you need to change your subscription: Get-AzSubscription / Select-AzSubscription -SubscriptionName 

# get subscription, this will get your current subscription
$subscriptionID=$currentAzContext.Subscription.Id

# name of the image to be created
$imageName="win2019image01"

# image distribution metadata reference name
$runOutputName="win2019ManImg02ro"

# image template name
$imageTemplateName="window2019VnetTemplate03"

# distribution properties object name (runOutput), i.e. this gives you the properties of the managed image on completion
$runOutputName="winSvrSigR01"

# VNET properties (update to match your existing virtual network, or leave as-is for demo)
# VNET name
$vnetName="myexistingvnet01"
# subnet name
$subnetName="subnet01"
# VNET resource group name
$vnetRgName="existingVnetRG"
# Existing Subnet NSG Name or the demo will create it
$nsgName="aibdemoNsg"
# NOTE! The virtual network must always be in the same region as the VM Image Builder service region.

创建资源组。

New-AzResourceGroup -Name $imageResourceGroup -Location $location

配置网络

如果没有现有的虚拟网络、子网或网络安全组 (NSG)，请使用以下脚本创建一个。

New-AzResourceGroup -Name $vnetRgName -Location $location

## Create base NSG to simulate an existing NSG
New-AzNetworkSecurityGroup -Name $nsgName -ResourceGroupName $vnetRgName -location $location

$nsg = Get-AzNetworkSecurityGroup -Name $nsgName -ResourceGroupName $vnetRgName 

$subnet = New-AzVirtualNetworkSubnetConfig -Name $subnetName -AddressPrefix "10.0.1.0/24" -PrivateLinkServiceNetworkPoliciesFlag "Disabled" -NetworkSecurityGroup $nsg

New-AzVirtualNetwork -Name $vnetName -ResourceGroupName $vnetRgName -Location $location -AddressPrefix "10.0.0.0/16" -Subnet $subnet

## NOTE! The virtual network must always be in the same region as the VM Image Builder service region.

添加 NSG 规则

此规则允许建立从 Azure VM 映像生成器负载均衡器到代理 VM 的连接。端口 60001 适用于 Linux，端口 60000 适用于 Windows。代理 VM 使用端口 22（适用于 Linux）或端口 5986（适用于 Windows）连接生成 VM。

Get-AzNetworkSecurityGroup -Name $nsgName -ResourceGroupName $vnetRgName  | Add-AzNetworkSecurityRuleConfig -Name AzureImageBuilderAccess -Description "Allow Image Builder Private Link Access to Proxy VM" -Access Allow -Protocol Tcp -Direction Inbound -Priority 400 -SourceAddressPrefix AzureLoadBalancer -SourcePortRange * -DestinationAddressPrefix VirtualNetwork -DestinationPortRange 60000-60001 | Set-AzNetworkSecurityGroup

在子网上禁用专用服务策略

下面介绍如何操作：

$virtualNetwork= Get-AzVirtualNetwork -Name $vnetName -ResourceGroupName $vnetRgName 
   
($virtualNetwork | Select -ExpandProperty subnets | Where-Object  {$_.Name -eq $subnetName} ).privateLinkServiceNetworkPolicies = "Disabled"  
 
$virtualNetwork | Set-AzVirtualNetwork

有关详细信息，请参阅 Azure VM 映像生成器网络选项。

修改示例模板并创建角色

配置网络后，可以修改示例模板并创建角色。下面介绍如何操作：

$templateUrl="https://raw.githubusercontent.com/azure/azvmimagebuilder/master/quickquickstarts/1a_Creating_a_Custom_Win_Image_on_Existing_VNET/existingVNETWindows.json"
$templateFilePath = "existingVNETWindows.json"

$aibRoleNetworkingUrl="https://raw.githubusercontent.com/azure/azvmimagebuilder/master/solutions/12_Creating_AIB_Security_Roles/aibRoleNetworking.json"
$aibRoleNetworkingPath = "aibRoleNetworking.json"

$aibRoleImageCreationUrl="https://raw.githubusercontent.com/azure/azvmimagebuilder/master/solutions/12_Creating_AIB_Security_Roles/aibRoleImageCreation.json"
$aibRoleImageCreationPath = "aibRoleImageCreation.json"

# download configs
Invoke-WebRequest -Uri $templateUrl -OutFile $templateFilePath -UseBasicParsing

Invoke-WebRequest -Uri $aibRoleNetworkingUrl -OutFile $aibRoleNetworkingPath -UseBasicParsing

Invoke-WebRequest -Uri $aibRoleImageCreationUrl -OutFile $aibRoleImageCreationPath -UseBasicParsing

# update AIB image config template
((Get-Content -path $templateFilePath -Raw) -replace '<subscriptionID>',$subscriptionID) | Set-Content -Path $templateFilePath
((Get-Content -path $templateFilePath -Raw) -replace '<rgName>',$imageResourceGroup) | Set-Content -Path $templateFilePath
((Get-Content -path $templateFilePath -Raw) -replace '<region>',$location) | Set-Content -Path $templateFilePath
((Get-Content -path $templateFilePath -Raw) -replace '<runOutputName>',$runOutputName) | Set-Content -Path $templateFilePath
((Get-Content -path $templateFilePath -Raw) -replace '<imageName>',$imageName) | Set-Content -Path $templateFilePath

((Get-Content -path $templateFilePath -Raw) -replace '<vnetName>',$vnetName) | Set-Content -Path $templateFilePath
((Get-Content -path $templateFilePath -Raw) -replace '<subnetName>',$subnetName) | Set-Content -Path $templateFilePath
((Get-Content -path $templateFilePath -Raw) -replace '<vnetRgName>',$vnetRgName) | Set-Content -Path $templateFilePath

创建用户分配的标识并设置权限

接下来，创建用户分配的标识并设置权限。下面介绍如何操作：

# setup role def names, these need to be unique
$timeInt=$(get-date -UFormat "%s")
$imageRoleDefName="Azure Image Builder Image Def"+$timeInt
$networkRoleDefName="Azure Image Builder Network Def"+$timeInt
$idenityName="aibIdentity"+$timeInt

# create user identity
## Add AZ PS module to support AzUserAssignedIdentity
Install-Module -Name Az.ManagedServiceIdentity

# create identity
New-AzUserAssignedIdentity -ResourceGroupName $imageResourceGroup -Name $idenityName

$idenityNameResourceId=$(Get-AzUserAssignedIdentity -ResourceGroupName $imageResourceGroup -Name $idenityName).Id
$idenityNamePrincipalId=$(Get-AzUserAssignedIdentity -ResourceGroupName $imageResourceGroup -Name $idenityName).PrincipalId

# update template with identity
((Get-Content -path $templateFilePath -Raw) -replace '<imgBuilderId>',$idenityNameResourceId) | Set-Content -Path $templateFilePath

# update the role defintion names
((Get-Content -path $aibRoleImageCreationPath -Raw) -replace 'Azure Image Builder Service Image Creation Role',$imageRoleDefName) | Set-Content -Path $aibRoleImageCreationPath
((Get-Content -path $aibRoleNetworkingPath -Raw) -replace 'Azure Image Builder Service Networking Role',$networkRoleDefName) | Set-Content -Path $aibRoleNetworkingPath

# update role definitions
((Get-Content -path $aibRoleNetworkingPath -Raw) -replace '<subscriptionID>',$subscriptionID) | Set-Content -Path $aibRoleNetworkingPath
((Get-Content -path $aibRoleNetworkingPath -Raw) -replace '<vnetRgName>',$vnetRgName) | Set-Content -Path $aibRoleNetworkingPath

((Get-Content -path $aibRoleImageCreationPath -Raw) -replace '<subscriptionID>',$subscriptionID) | Set-Content -Path $aibRoleImageCreationPath
((Get-Content -path $aibRoleImageCreationPath -Raw) -replace '<rgName>', $imageResourceGroup) | Set-Content -Path $aibRoleImageCreationPath

# create role definitions from role configurations examples, this avoids granting contributor to the SPN
New-AzRoleDefinition -InputFile  ./aibRoleImageCreation.json
New-AzRoleDefinition -InputFile  ./aibRoleNetworking.json

# grant role definition to image builder user identity
New-AzRoleAssignment -ObjectId $idenityNamePrincipalId -RoleDefinitionName $imageRoleDefName -Scope "/subscriptions/$subscriptionID/resourceGroups/$imageResourceGroup"
New-AzRoleAssignment -ObjectId $idenityNamePrincipalId -RoleDefinitionName $networkRoleDefName -Scope "/subscriptions/$subscriptionID/resourceGroups/$vnetRgName"

有关详细信息，请参阅使用 Azure CLI 配置 Azure VM 映像生成器服务权限或使用 PowerShell 配置 Azure VM 映像生成器服务权限。

创建映像

将映像配置提交到 Azure VM 映像生成器。

New-AzResourceGroupDeployment -ResourceGroupName $imageResourceGroup -TemplateFile $templateFilePath -api-version "2020-02-14" -imageTemplateName $imageTemplateName -svclocation $location

注意

这需要一分钟时间，因为验证是针对安全性、依赖项等方面运行的。

启动映像生成。

Invoke-AzResourceAction -ResourceName $imageTemplateName -ResourceGroupName $imageResourceGroup -ResourceType Microsoft.VirtualMachineImages/imageTemplates -ApiVersion "2020-02-14" -Action Run -Force

获取生成状态和属性

首先，查询映像模板的当前运行状态或上次运行状态和映像模板设置。

$managementEp = $currentAzureContext.Environment.ResourceManagerUrl

$urlBuildStatus = [System.String]::Format("{0}subscriptions/{1}/resourceGroups/$imageResourceGroup/providers/Microsoft.VirtualMachineImages/imageTemplates/{2}?api-version=2020-02-14", $managementEp, $currentAzureContext.Subscription.Id,$imageTemplateName)

$buildStatusResult = Invoke-WebRequest -Method GET  -Uri $urlBuildStatus -UseBasicParsing -Headers  @{"Authorization"= ("Bearer " + $accessToken)} -ContentType application/json 
$buildJsonStatus =$buildStatusResult.Content
$buildJsonStatus

此示例的映像生成大约需要 50 分钟，（包括多次重启和 Windows 更新）。查询状态时，查找 lastRunStatus。以下代码显示生成仍在运行。如果已成功完成，将显示 succeeded。

  "lastRunStatus": {
   "startTime": "2019-08-21T00:39:40.61322415Z",
   "endTime": "0001-01-01T00:00:00Z",
   "runState": "Running",
   "runSubState": "Building",
   "message": ""
  },

查询分发属性

如果要分发到 VHD 位置，需要托管映像位置属性或 Azure Compute Gallery 复制状态，则需要查询 runOutput。每次有分发目标时，都会有一个唯一的 runOutput，用于描述分发类型的属性。

$managementEp = $currentAzureContext.Environment.ResourceManagerUrl
$urlRunOutputStatus = [System.String]::Format("{0}subscriptions/{1}/resourceGroups/$imageResourceGroup/providers/Microsoft.VirtualMachineImages/imageTemplates/$imageTemplateName/runOutputs/{2}?api-version=2020-02-14", $managementEp, $currentAzureContext.Subscription.Id, $runOutputName)

$runOutStatusResult = Invoke-WebRequest -Method GET  -Uri $urlRunOutputStatus -UseBasicParsing -Headers  @{"Authorization"= ("Bearer " + $accessToken)} -ContentType application/json 
$runOutJsonStatus =$runOutStatusResult.Content
$runOutJsonStatus

创建 VM

现在生成已完成，可以从映像生成 VM 了。使用 PowerShell New-AzVM 文档中的示例。

清理任务

现在，如果需要，可以删除映像模板项目、角色分配和资源组。

下面介绍如何删除映像模板项目：

# Get ResourceID of the Image Template
$resTemplateId = Get-AzResource -ResourceName $imageTemplateName -ResourceGroupName $imageResourceGroup -ResourceType Microsoft.VirtualMachineImages/imageTemplates -ApiVersion "2020-02-14"

### Delete Image Template Artifact
Remove-AzResource -ResourceId $resTemplateId.ResourceId -Force

下面介绍如何删除角色分配：

## remove role assignments
Remove-AzRoleAssignment -ObjectId $idenityNamePrincipalId  -RoleDefinitionName $imageRoleDefName -Scope "/subscriptions/$subscriptionID/resourceGroups/$imageResourceGroup"
Remove-AzRoleAssignment -ObjectId $idenityNamePrincipalId -RoleDefinitionName $networkRoleDefName -Scope "/subscriptions/$subscriptionID/resourceGroups/$vnetRgName"

## remove definitions
Remove-AzRoleDefinition -Id $imageRoleDefObjId -Force
Remove-AzRoleDefinition -Id $networkRoleObjId -Force

## delete identity
Remove-AzUserAssignedIdentity -ResourceGroupName $imageResourceGroup -Name $idenityName -Force

下面介绍如何删除资源组：

Remove-AzResourceGroup $imageResourceGroup -Force


# delete VNET created
# BEWARE! In this example, you have either used an existing virtual network or created one for this example. Do not delete your existing virtual network. If you want to delete the virtual network resource group used in this example '$vnetRgName', modify the preceding code.

后续步骤

Azure 计算库

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