Inicio rápido: Uso de la identidad administrada con Data API Builder

En este inicio rápido, usará el ejemplo Quickstart 2 Managed Identity para ejecutar Data API Builder (DAB) con acceso sin contraseña a Azure SQL. En el ejemplo se usa el acceso anónimo del usuario a la aplicación web, el acceso anónimo desde la aplicación web a DAB y una identidad administrada asignada por el sistema de DAB a Azure SQL.

En el ejemplo se exponen datos SQL a través de REST, GraphQL y MCP. También incluye la orquestación local de .NET Aspire y scripts de despliegue en Azure.

Prerequisites

• .NET 8 o una versión posterior
• Docker Desktop
• PowerShell
• Herramientas de .NET Aspire para la orquestación local
• CLI de Azure para la implementación de Azure
• sqlpackage si implementa el proyecto de base de datos
• Una suscripción de Azure con permiso para crear Azure SQL, Azure Container Apps, Azure Container Registry, Log Analytics y un grupo de recursos
• Un usuario o grupo de Microsoft Entra que puede convertirse en el administrador de Azure SQL Microsoft Entra

¿Qué muestra el ejemplo?

• Una aplicación web estática que llama a DAB sin inicio de sesión de usuario.
• DAB configurado como la única capa para API, GraphQL y MCP sobre SQL.
• Autenticación de SQL de DAB al contenedor de desarrollo de SQL Server local.
• Acceso DAB sin contraseña a Azure SQL a través de una identidad administrada asignada por el sistema.
• Azure SQL configurado con un administrador de Microsoft Entra.
• Un usuario de base de datos contenida creado para la identidad administrada de DAB.
• las asignaciones de rol de db_datareader y db_datawriter para la identidad DAB.
• Orquestación de .NET Aspire para SQL Server local, DAB, la aplicación web, SQL Commander y MCP Inspector.
• Implementación y limpieza de Azure a través de scripts de PowerShell en azure-infra.

Flujo de autenticación

Comparación con la serie

Uso del ejemplo

Clona el repositorio de ejemplo.

git clone https://github.com/Azure-Samples/dab-2.0-quickstart-web_anon-api_anon-db_entra.git
cd dab-2.0-quickstart-web_anon-api_anon-db_entra

Ejecute el ejemplo localmente.

dotnet tool restore
dotnet run --project aspire-apphost

El panel de control de Aspire se abre en http://localhost:15888. La aplicación web se abre en http://localhost:5173. Use el panel para inspeccionar el punto de conexión de DAB, el contenedor SQL Server, el inspector de MCP y los recursos de SQL Commander.

Implemente el ejemplo en Azure.

pwsh ./azure-infra/azure-up.ps1

El script de implementación aprovisiona recursos Azure SQL y Azure Container Apps para DAB, la aplicación web, el Inspector de MCP y SQL Commander. También establece la aplicación contenedora DAB para usar una identidad administrada asignada por el sistema y configura un Azure SQL cadena de conexión sin contraseña con forma similar a este ejemplo.

Server=tcp:<sql-server>.database.windows.net,1433;Database=<database>;Authentication=Active Directory Default;Encrypt=True;TrustServerCertificate=False;

El script posterior al aprovisionamiento establece el administrador de Azure SQL Microsoft Entra, crea un usuario de base de datos independiente para la identidad administrada de DAB y concede db_datareader y db_datawriter.

Limpie Azure recursos cuando haya terminado.

pwsh ./azure-infra/azure-down.ps1

Archivos clave

Uso de GitHub Copilot para volver a crear este ejemplo

Abra el área de trabajo en la que desea crear el ejemplo en Visual Studio Code, cambie GitHub Copilot al modo de agente y pegue este mensaje.

You are GitHub Copilot running in agent mode. Recreate the Data API builder Quickstart 2 Managed Identity sample as a complete, runnable project in the current VS Code workspace under `quickstart-02-managed-identity`. Build a static web app, DAB, local SQL Server with SQL authentication for development, Azure SQL with system-assigned managed identity for Azure, REST, GraphQL, MCP, .NET Aspire, SQL Commander, MCP Inspector, and Azure Container Apps deployment scripts. DAB is the only API, GraphQL, and MCP layer over SQL.

Source repository: https://github.com/Azure-Samples/dab-2.0-quickstart-web_anon-api_anon-db_entra. If internet access is available, inspect or clone this repository before you create files. Reuse and adapt its files as closely as possible, especially `web-app/`, `data-api/`, `database/`, `aspire-apphost/`, `mcp-inspector/`, `azure-infra/`, scripts, and README patterns. The goal is to implement the published quickstart, not to invent a different sample. If the repository differs from this prompt or the current Data API builder docs, prefer the current docs for product behavior.

Minimize user interaction. Use the defaults in this prompt and make reasonable best guesses for noncritical choices. Do not ask for a root folder or project folder name; use the current VS Code workspace and the default subfolder. Ask only when you need approval for resource changes, secrets, permissions, materially higher cost, external account choices, or an ambiguous requirement that affects the architecture.

Start with a short plan and proceed with safe defaults before you create files or run commands. Use the default demo schema unless the user requests a custom schema. Ask only these questions if the values aren't already available from the environment or prior context:

- Which Azure subscription, primary region, fallback region, and resource group should Azure deployment use? Default fallback region: `westus2` if the primary region can't provision Azure SQL or Container Apps.
- Which Microsoft Entra user or group should become the Azure SQL Microsoft Entra admin?
- Do you approve creating billable Azure resources if the deployment phase starts?

After the answers, show a checklist and ask for approval before implementation. Include phases for local scaffold, local validation, Azure infrastructure, managed identity database grants, Azure validation, and cleanup. Do not run any Azure command that creates or changes resources until the user explicitly approves the exact command set.

After approval, continue working without asking status-check questions. If a command, build, container, endpoint, or validation step fails, inspect the error, adjust the project, rerun the step, and continue. Keep iterating until the sample runs end-to-end or you hit a blocker that requires user action.

Use cost-first Azure defaults. Choose the cheapest option that satisfies the quickstart requirements: use a free Azure SQL database offer when the subscription and region support it; otherwise choose the lowest-cost SQL option that supports managed identity. Use Azure Container Apps consumption, minimal CPU and memory, Basic Azure Container Registry, minimal Log Analytics retention, and no always-on or dedicated plans unless required. Prioritize finishing the project. Treat regional provisioning limits as expected adjustment points, not failures: if the primary region can't provision a required service or free SQL option, use the approved fallback region such as `westus2`, and continue the deployment. Ask the user only when both the primary and fallback regions can't satisfy the requirements, when a change would materially increase cost, when a new permission is required, or when you need approval for Azure commands that create or change resources beyond the already-approved plan. Keep every resource minimal, but make the web interface neat and approachable: small code footprint, responsive layout, clear status messages, accessible labels, and simple styling that is polished rather than austere.

Verify prerequisites and report only missing items: .NET SDK, Docker Desktop running, PowerShell, Azure CLI signed in, `sqlpackage`, .NET Aspire tooling, and the DAB CLI. Use these docs while building:

- DAB CLI reference: https://learn.microsoft.com/azure/data-api-builder/command-line/
- `dab init`: https://learn.microsoft.com/azure/data-api-builder/command-line/dab-init
- `dab add`: https://learn.microsoft.com/azure/data-api-builder/command-line/dab-add
- `dab validate`: https://learn.microsoft.com/azure/data-api-builder/command-line/dab-validate
- DAB MCP overview: https://learn.microsoft.com/azure/data-api-builder/mcp/overview

Create this structure under the sample folder:

- `azure-infra/` for Bicep, `azure-up.ps1`, `azure-down.ps1`, and `post-provision.ps1`.
- `data-api/` for `dab-config.json` and a DAB Dockerfile that bakes the config into the image for Azure.
- `database/` for a SQL Database Project or idempotent SQL scripts with seed data.
- `web-app/` for static HTML, CSS, and JavaScript that calls DAB anonymously.
- `aspire-apphost/` for the .NET Aspire AppHost.
- `mcp-inspector/` for MCP Inspector notes or container assets.

Handle secrets first. Add `.env`, `**/bin`, and `**/obj` to `.gitignore` before writing secrets. Use `MSSQL_CONNECTION_STRING` locally. Never print secret values. Use `@env('MSSQL_CONNECTION_STRING')` in local `dab-config.json`.

Configure DAB CORS before you start or deploy the web app. Do not leave `runtime.host.cors.origins` as `[]`. Set it to include the exact web app origins, including scheme and port: the local Aspire web origin, such as `http://localhost:5173`, and the deployed Azure Container Apps web FQDN if Azure deployment is approved. Keep `allow-credentials` set to `false` unless the sample explicitly uses browser credentials or cookies. Direct REST, GraphQL, or Swagger requests can succeed even when the browser blocks JavaScript fetch calls, so browser-origin CORS must be configured and validated separately.

Use this DAB CLI workflow for local config and validation:

```dotnetcli
dab init --database-type mssql --connection-string "@env('MSSQL_CONNECTION_STRING')" --host-mode Development --rest.enabled true --graphql.enabled true --mcp.enabled true
dab add Todos --source dbo.Todos --source.type table --permissions "anonymous:read" --mcp.dml-tools true
dab validate --config data-api/dab-config.json
```

Use this Azure SQL connection string shape for the Azure Container App. The Azure DAB configuration must not contain `User ID=` or `Password=`.

```text
Server=tcp:<sql-server>.database.windows.net,1433;Database=<database>;Authentication=Active Directory Default;Encrypt=True;TrustServerCertificate=False;
```

Enable system-assigned identity on the DAB Container App and output its principal ID for post-provisioning.

```bicep
identity: {
  type: 'SystemAssigned'
}
```

In post-provisioning, set the Azure SQL Microsoft Entra admin, deploy the schema, create a contained database user for the DAB managed identity, and grant least required database roles.

```sql
CREATE USER [<dab-container-app-name>] FROM EXTERNAL PROVIDER;
ALTER ROLE db_datareader ADD MEMBER [<dab-container-app-name>];
ALTER ROLE db_datawriter ADD MEMBER [<dab-container-app-name>];
```

Use these Aspire patterns from the quickstart skills. Use `.WaitForCompletion(sqlDatabaseProject)` for DAB and SQL Commander when a SQL project deploys schema.

```csharp
var sqlDatabaseProject = builder.AddSqlProject<Projects.database>("sql-project")
	.WithReference(sqlDatabase);

var dabServer = builder.AddContainer("data-api", "azure-databases/data-api-builder", "latest")
	.WithImageRegistry("mcr.microsoft.com")
	.WithBindMount(new FileInfo("data-api/dab-config.json").FullName, "/App/dab-config.json", isReadOnly: true)
	.WithEnvironment("MSSQL_CONNECTION_STRING", sqlDatabase)
	.WithHttpEndpoint(targetPort: 5000, name: "http")
	.WithHttpHealthCheck("/health")
	.WaitForCompletion(sqlDatabaseProject);
```

Add SQL Commander with image `jerrynixon/sql-commander:latest`, env var `ConnectionStrings__db`, and a connection string that includes `TrustServerCertificate=true`.

```csharp
var sqlCommander = builder.AddContainer("sql-cmdr", "jerrynixon/sql-commander", "latest")
	.WithImageRegistry("docker.io")
	.WithHttpEndpoint(targetPort: 8080, name: "http")
	.WithEnvironment("ConnectionStrings__db", sqlDatabase)
	.WithHttpHealthCheck("/health")
	.WaitForCompletion(sqlDatabaseProject);
```

Add MCP Inspector with Streamable HTTP transport and omit auth only for local development.

```csharp
var mcpInspector = builder.AddMcpInspector("mcp-inspector")
	.WithMcpServer(dabServer, transportType: McpTransportType.StreamableHttp)
	.WithEnvironment("DANGEROUSLY_OMIT_AUTH", "true")
	.WaitFor(dabServer);
```

For Azure, bake `dab-config.json` into the DAB image. Do not rely on volume mounts in Azure Container Apps.

```dockerfile
FROM mcr.microsoft.com/azure-databases/data-api-builder:latest
COPY dab-config.json /App/dab-config.json
```

Validate before reporting success:

- `dab validate --config data-api/dab-config.json` exits with code 0.
- `dotnet run --project aspire-apphost` starts the complete local environment.
- Aspire shows SQL Server, DAB, SQL Commander, and MCP Inspector healthy.
- A direct database query confirms the seeded table exists and contains rows.
- DAB `/health` returns a 2xx response.
- A browser-origin request from each web app origin receives an `Access-Control-Allow-Origin` response header that matches that origin.
- REST, GraphQL, and MCP return seeded data anonymously.
- MCP Inspector can list DAB tools and call `describe_entities` or an equivalent DAB MCP tool.
- SQL Commander opens and shows seeded tables.
- The web site returns a successful HTTP response.
- In Azure, the DAB Container App has a system-assigned managed identity.
- In Azure, the connection string contains `Authentication=Active Directory Default` and contains no `User ID=` or `Password=`.
- The DAB managed identity exists as a contained database user with `db_datareader` and `db_datawriter`.

Do not report final URLs, asset locations, or a success summary until you directly verify database connectivity and query results, a 2xx DAB health response, and a successful web site response. This validation ensures the sample works without requiring the developer to check.

Contenido relacionado

• Guías de inicio rápido de Data API Builder
• Quickstart: agregar un proveedor de Microsoft Entra al generador de Data API
• Inicio rápido: Uso de la autenticación de SQL con Data API Builder
• Inicio rápido: Uso del generador de API de datos con SQL
• Compatibilidad con el servidor MCP en Data API Builder
• Implementar Data API builder en Azure Container Apps
• Archivo de configuración DAB