# Security { #security }

There are many ways to handle security, authentication and authorization.

And it normally is a complex and "difficult" topic.

In many frameworks and systems just handling security and authentication takes a big amount of effort and code (in many cases it can be 50% or more of all the code written).

And that function takes parameters in the same way that *path operation functions* do.

/// tip

You'll see what other "things", apart from functions, can be used as dependencies in the next chapter.

///

Whenever a new request arrives, **FastAPI** will take care of:

* Calling your dependency ("dependable") function with the correct parameters.

- Kubeadm: fix the bug that configurable KubernetesVersion not respected during kubeadm join ([#111022](https://github.com/kubernetes/kubernetes/pull/111022), [@SataQiu](https://github.com/SataQiu)) [SIG Cluster Lifecycle]
- Reduced time taken to sync proxy rules on Windows kube-proxy with kernelspace mode ([#110702](https://github.com/kubernetes/kubernetes/pull/110702), [@daschott](https://github.com/daschott)) [SIG Network and Windows]

labels.handler_parameter=Parameter
labels.handlerScript=Script
labels.data_crawling_button_create=Maken
labels.data_crawling_button_create_job=Nieuwe taak maken
labels.wizard_title_configuration=Configuratiewizard
labels.wizard_start_title=Snelle installatie
labels.wizard_start_desc=U kunt eenvoudig een crawlconfiguratie maken met behulp van de configuratiewizard.
labels.wizard_start_button=Start configuratie

For example, to declare a header of `X-Token` that can appear more than once, you can write:

{* ../../docs_src/header_params/tutorial003_an_py310.py hl[9] *}

If you communicate with that *path operation* sending two HTTP headers like:

```
X-Token: foo
X-Token: bar
```

The response would be like:

```JSON
{
    "X-Token values": [
        "bar",
        "foo"
    ]
}
```

  --initial-cluster s1=http://0.0.0.0:2380 \
  --initial-cluster-token tkn \
  --initial-cluster-state new
```

You may also setup etcd with TLS following this documentation [here](https://coreos.com/etcd/docs/latest/op-guide/security.html)

### 3. Setup MinIO with etcd

MinIO server expects environment variable for etcd as `MINIO_ETCD_ENDPOINTS`, this environment variable takes many comma separated entries.

```

on 16 drive MinIO deployment. If you use eight data and eight parity drives, the file space usage will be approximately twice, i.e. 100 MiB
file will take 200 MiB space. But, if you use ten data and six parity drives, same 100 MiB file takes around 160 MiB. If you use 14 data and
two parity drives, 100 MiB file takes only approximately 114 MiB.

| aud        | _string array_ | The token audience list. The client identifier of the OAuth clients that the JWT is intended for, is sent herewith.                                                                     |
| azp        | _string_       | The authorized party for which the token is issued to. The client identifier of the OAuth client that the token is issued for, is sent herewith.                                        |

- Ensures `ExecProbeTimeout=false` kubelet feature gate with dockershim is taken into account, when the exec probe takes longer than `timeoutSeconds` configuration. ([#100200](https://github.com/kubernetes/kubernetes/pull/100200), [@jackfrancis](https://github.com/jackfrancis))

      // we allow one second worth of work to go in a burst (i.e. take less than a second)
      assertThat(burst).isAtMost(1000);
      long afterBurst = measureTotalTimeMillis(limiter, oneSecWorthOfWork, new Random());
      // but work beyond that must take at least one second
      assertThat(afterBurst).isAtLeast(1000);
    }
  }

  /**