- Kubeadm: fixes a preflight check that can fail hostname construction in IPV6 setups ([#134592](https://github.com/kubernetes/kubernetes/pull/134592), [@liggitt](https://github.com/liggitt)) [SIG API Machinery, Auth, Cloud Provider, Cluster Lifecycle and Testing]

### Other (Cleanup or Flake)

# Security - First Steps { #security-first-steps }

Let's imagine that you have your **backend** API in some domain.

And you have a **frontend** in another domain or in a different path of the same domain (or in a mobile application).

And you want to have a way for the frontend to authenticate with the backend, using a **username** and **password**.

We can use **OAuth2** to build that with **FastAPI**.

# See the License for the specific language governing permissions and
# limitations under the License.
# ==============================================================================
#
# Sets up custom apt sources for our TF images.

# Prevent apt install tzinfo from asking our location (assumes UTC)
export DEBIAN_FRONTEND=noninteractive

# Set up shared custom sources
apt-get update

    return CartesianSet.create(sets);
  }

  /**
   * Returns every possible list that can be formed by choosing one element from each of the given
   * sets in order; the "n-ary <a href="http://en.wikipedia.org/wiki/Cartesian_product">Cartesian
   * product</a>" of the sets. For example:
   *
   * {@snippet :
   * Sets.cartesianProduct(

# See the License for the specific language governing permissions and
# limitations under the License.
# ==============================================================================
#
# Sets up custom apt sources for our TF images.

# Prevent apt install tzinfo from asking our location (assumes UTC)
export DEBIAN_FRONTEND=noninteractive

# Fetch the NVIDIA key.

# Segurança - Primeiros Passos { #security-first-steps }

Vamos imaginar que você tem a sua API de **backend** em algum domínio.

E você tem um **frontend** em outro domínio ou em um path diferente no mesmo domínio (ou em uma aplicação mobile).

E você quer uma maneira de o frontend autenticar com o backend, usando um **username** e **password**.

Podemos usar **OAuth2** para construir isso com o **FastAPI**.

# Seguridad - Primeros pasos { #security-first-steps }

Imaginemos que tienes tu API de **backend** en algún dominio.

Y tienes un **frontend** en otro dominio o en un path diferente del mismo dominio (o en una aplicación móvil).

Y quieres tener una forma para que el frontend se autentique con el backend, usando un **username** y **password**.

Podemos usar **OAuth2** para construir eso con **FastAPI**.

# Первые шаги { #first-steps }

Самый простой файл FastAPI может выглядеть так:

{* ../../docs_src/first_steps/tutorial001_py39.py *}

Скопируйте это в файл `main.py`.

Запустите сервер в режиме реального времени:

<div class="termy">

```console
$ <font color="#4E9A06">fastapi</font> dev <u style="text-decoration-style:solid">main.py</u>

    private UrlQueueServiceImpl service;

    @Mock
    private MemoryDataHelper dataHelper;

    @Override
    protected void setUp() throws Exception {
        super.setUp();
        MockitoAnnotations.openMocks(this);
    }

    public void test_add() {
        // Setup
        String sessionId = "session123";
        String url = "https://example.com/page";

# Primeiros Passos { #first-steps }

O arquivo FastAPI mais simples pode se parecer com:

{* ../../docs_src/first_steps/tutorial001_py39.py *}

Copie o conteúdo para um arquivo `main.py`.

Execute o servidor:

<div class="termy">

```console
$ <font color="#4E9A06">fastapi</font> dev <u style="text-decoration-style:solid">main.py</u>