How can I pass pipeline variable to parameters file for blueprint assignment

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I'm trying to create an Azure DevOps pipeline for deploying Azure Blueprint. There are some fields in the parameters file(JSON) which I want to be configurable. How can I pass these values as pipeline variables and use them in the parameters file?

I tried defining a pipeline variable and reference it in the parameter file like this "$(var-name)", but it didn't work. Is there a way to solve this?

Below is my pipeline definition, I'm using AzureBlueprint extension for creating and assigning blueprint:

steps:
- task: CreateBlueprint@1
  inputs:
    azureSubscription: $(serviceConnection)
    BlueprintName: $(blueprintName)
    BlueprintPath: '$(blueprintPath)'
    AlternateLocation: false
    PublishBlueprint: true

- task: AssignBlueprint@1
  inputs:
    azureSubscription: $(serviceConnection)
    AssignmentName: '$(blueprintName)-assignment'
    BlueprintName: $(blueprintName)
    ParametersFile: '$(blueprintPath)/assign.json'
    SubscriptionID: $(subscriptionId)
    Wait: true
    Timeout: 500

and my parameters file:

"parameters":{
         "organization" : {
            "value": "xxxx"
         },
         "active-directory-domain-services_ad-domain-admin-password" : {
            "reference": {
               "keyVault": {
                     "id": "/subscriptions/xxxx/resourceGroups/xxxx/providers/Microsoft.KeyVault/vaults/xxxx"
               },
               "secretName": "xxxx"
            }
         },
         "jumpbox_jumpbox-local-admin-password" : {
            "reference": {
               "keyVault": {
                     "id": "/subscriptions/xxxx/resourceGroups/xxxx/providers/Microsoft.KeyVault/vaults/xxxx"
               },
               "secretName": "xxxx"
            }
         },         
         "keyvault_ad-domain-admin-user-password" : {
            "value" : "xxxx"
         },
         "keyvault_deployment-user-object-id" : {
            "value" : "xxxx"
         },
         "keyvault_jumpbox-local-admin-user-password" : {
            "value" : "xxxx"
         }
      }
azure-blueprints azure-devops azure
2 Answers

Since the Tasks (CreateBlueprint and AssignBlueprint) you are using doesn't support overriding parameters, you have two options:

  • Use the Azure CLI az blueprint command to directly create and assign blueprints.
  • Change the parameters file bei either using JSON variable substitution or by using a small PowerShell script (see blow):

Sample:

$paramFile = Get-Content ./azuredeploy.parameters.json | ConvertFrom-Json
$paramFile.parameters.organization.value = "your-org-name" 
$paramFile | ConvertTo-Json | Set-Content ./azuredeploy.parameters.json

Be aware that the Task you are using hasn't received an update within the last 17 months (here is the GitHub repository).

user_11634230

AssignBlueprint@1 doesn't support natively this. However you can modify assign.json using Json substitution

It comes down to having Azure Pipeline variables with a name like a path to a leaf in the json file which you want to teplace.

Here is an example:

variables:
  Data.DebugMode: disabled
  Data.DefaultConnection.ConnectionString: 'Data Source=(prodDB)\MSDB;AttachDbFilename=prod.mdf;'
  Data.DBAccess.Users.0: Admin-3
  Data.FeatureFlags.Preview.1.NewWelcomeMessage: AllAccounts

# Update appsettings.json via FileTransform task.
- task: FileTransform@1
  displayName: 'File transformation: appsettings.json'
  inputs:
    folderPath: '$(Build.ArtifactStagingDirectory)/$(Build.BuildId).zip'
    targetFiles: '**/appsettings.json'
    fileType: json
user_23479990
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