How to use Sqlpackage with Managed Identity

To export Azure SQL database using Sqlpackage and Managed Identity:

Step1

Enable system assigned managed identity on an Azure VM

Step2

- Enable AAD auth on Azure SQL server

- Conn to Azure SQL database via AAD admin

- Create contained user for the managed identity (using Azure VM name as contained username)

create user <vmname> from external provider;

alter role db_owner add member <vmname>;

Step3

On the Azure VM where we enabled System assigned Managed Identity, execute below to test getting access token:

# Using PowerShell’s Invoke-WebRequest, make a request to the local managed identity's endpoint to get an access token for Azure SQL:

$response = Invoke-WebRequest -Uri 'http://169.254.169.254/metadata/identity/oauth2/token?api-version=2018-02-01&resource=https%3A%2F%2Fdatabase.windows.net%2F' -Method GET -Headers @{Metadata="true"}

# Convert the response from a JSON object to a PowerShell object:

$content = $response.Content | ConvertFrom-Json

# Extract the access token from the response:

$AccessToken = $content.access_token

Step4

Run sqlpackage + managed identity to export database

./sqlpackage.exe /at:$AccessToken /Action:Export /TargetFile:"C:\AdventureWorksLT.bacpac" \ /SourceConnectionString:"Server=tcp:{yourserver}.database.windows.net,1433;Initial Catalog=AdventureWorksLT;MultipleActiveResultSets=False;Encrypt=True;TrustServerCertificate=False;Connection Timeout=30;"

# OR

./sqlpackage.exe /at:$($AccessToken_Object.Token) /Action:Export /TargetFile:"C:\AdventureWorksLT.bacpac" \ /SourceConnectionString:"Server=tcp:{yourserver}.database.windows.net,1433;Initial Catalog=AdventureWorksLT;MultipleActiveResultSets=False;Encrypt=True;TrustServerCertificate=False;Connection Timeout=30;"

Reference:

Tutorial: Use a managed identity to access Azure SQL Database - Windows - Azure AD - Microsoft Entra | Microsoft Learn

How managed identities for Azure resources work with Azure virtual machines - Microsoft Entra | Microsoft Learn

SqlPackage Export - SQL Server | Microsoft Learn

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