Início Rápido: Usar a identidade gerenciada com o construtor de API de Dados

Neste início rápido, você usará o exemplo de Identidade Gerenciada Quickstart 2 para executar o DAB (Construtor de API de Dados) com acesso sem senha ao SQL do Azure. O exemplo usa o acesso anônimo do usuário ao aplicativo Web, o acesso anônimo do aplicativo Web ao DAB e uma identidade gerenciada atribuída pelo sistema do DAB para SQL do Azure.

O exemplo expõe dados SQL por meio de REST, GraphQL e MCP. Ele também inclui a orquestração local do .NET Aspire e scripts de implantação do Azure.

Importante

O caminho local pode usar a autenticação SQL como alternativa para desenvolvimento. O caminho Azure usa identidade gerenciada e não tem senha SQL na configuração do DAB.

Pré-requisitos

• .NET 8 ou posterior
• Área de Trabalho do Docker
• PowerShell
• ferramentas .NET Aspire para orquestração local
• CLI do Azure para implantação de Azure
• sqlpackage se você fizer a implantação do projeto de banco de dados
• Uma assinatura Azure com permissão para criar SQL do Azure, Aplicativos de Contêiner do Azure, Registro de Contêiner do Azure, Log Analytics e um grupo de recursos
• Um usuário ou grupo Microsoft Entra que pode se tornar o administrador do SQL do Azure Microsoft Entra

O que o exemplo mostra

• Um aplicativo Web estático que chama o DAB sem a entrada do usuário.
• DAB configurado como a única camada de API, GraphQL e MCP sobre SQL.
• Autenticação SQL do DAB para o contêiner local de desenvolvimento do SQL Server.
• Acesso do DAB sem senha ao SQL do Azure usando uma identidade gerenciada atribuída pelo sistema.
• SQL do Azure configurado com um administrador do Microsoft Entra.
• Um usuário de banco de dados independente criado para a identidade gerenciada do DAB.
• db_datareader e db_datawriter atribuições de função para a identidade do DAB.
• Orquestração do .NET Aspire para o SQL Server local, DAB, o aplicativo web, SQL Commander e MCP Inspector.
• Implantação e limpeza do Azure usando scripts do PowerShell em azure-infra.

Fluxo de autenticação

Hop	Autenticação local	Autenticação do Azure
Do usuário para o aplicativo web	Anônimo	Anônimo
Aplicativo Web para API	Anônimo	Anônimo
API para SQL	Autenticação do SQL	Identidade gerenciada atribuída pelo sistema

Comparar com a série

Step	O que muda
Anterior	Usar autenticação SQL armazena uma credencial SQL para o acesso do DAB ao SQL.
Este início rápido	Remove a senha SQL do Azure usando uma identidade gerenciada atribuída pelo sistema.
Próximo	Adicionar um provedor do Microsoft Entra configura a validação de token, mantendo o acesso anônimo à API.

Utilize o exemplo

Clone o repositório de exemplo.

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

Execute o exemplo localmente.

dotnet tool restore
dotnet run --project aspire-apphost

O painel do Aspire é aberto em http://localhost:15888. O aplicativo Web é aberto em http://localhost:5173. Use o painel para inspecionar o endpoint do DAB, o contêiner do SQL Server, o MCP Inspector e os recursos do SQL Commander.

Implante o exemplo para Azure.

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

O script de implantação provisiona recursos SQL do Azure e Aplicativos de Contêiner do Azure para DAB, o aplicativo Web, o Inspetor MCP e o Comandante do SQL. Também define o aplicativo de contêiner do DAB para usar uma identidade gerenciada atribuída pelo sistema e configura uma cadeia de conexão sem senha do SQL do Azure no formato deste exemplo.

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

O script pós-provisionamento define o administrador SQL do Azure Microsoft Entra, cria um usuário de banco de dados independente para a identidade gerenciada do DAB e concede db_datareader e db_datawriter.

Limpe os recursos do Azure quando terminar.

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

Arquivos de chave

Caminho	Purpose
azure-infra/resources.bicep	Define os recursos do Azure, habilita SystemAssigned a identidade no Aplicativo de Contêineres do DAB e define a cadeia de conexão sem senha do SQL do Azure.
azure-infra/main.bicep	Orquestra a implantação e retorna a ID do principal do Aplicativo de Contêiner DAB.
azure-infra/post-provision.ps1	Configura o administrador do Microsoft Entra para o SQL do Azure, cria o usuário de banco de dados contido para a identidade do DAB e concede funções no banco de dados.
data-api/dab-config.json	Configuração de runtime do DAB para SQL, REST, GraphQL, MCP e acesso de entidade anônima.
database	Projeto de banco de dados SQL, arquivos de esquema e scripts de dados iniciais.
web-app	Aplicativo Web estático que chama o DAB anonimamente.
aspire-apphost	.NET Aspire AppHost que orquestra contêineres locais e recursos de projeto.

Use GitHub Copilot para recriar este exemplo

Abra o workspace no qual você deseja criar o exemplo em Visual Studio Code, alterne GitHub Copilot para o modo de agente e cole esse prompt.

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.

Conteúdo relacionado

• Inícios rápidos do Construtor de API de Dados
• Quickstart: adicionar um provedor de Microsoft Entra ao construtor de API de Dados
• Início Rápido: Usar a autenticação SQL com o Construtor de API de Dados
• Início Rápido: Usar o construtor de API de Dados com SQL
• Suporte ao servidor MCP no construtor de API de Dados
• Deploy Data API builder to Aplicativos de Contêiner do Azure
• Arquivo de configuração do DAB