As you saw in the previous chapter about [Deployment Concepts](concepts.md){.internal-link target=_blank}, there are multiple strategies you can use.

Here I'll show you how to use <a href="https://gunicorn.org/" class="external-link" target="_blank">**Gunicorn**</a> with **Uvicorn worker processes**.

!!! info

  terminationGracePeriodSeconds: 30

  # A list of `Volumes` added into the Gateway Pods. See
  # https://kubernetes.io/docs/concepts/storage/volumes/.
  volumes: []

  # A list of `VolumeMounts` added into the Gateway Pods. See
  # https://kubernetes.io/docs/concepts/storage/volumes/.
  volumeMounts: []

  # Configure this to a higher priority class in order to make sure your Istio gateway pods

cloud** qui fait une partie du travail pour vous, ou encore d'autres options possibles.

Je vais vous montrer certains des principaux concepts que vous devriez probablement avoir à l'esprit lors du déploiement
d'une application **FastAPI** (bien que la plupart de ces concepts s'appliquent à tout autre type d'application web).

## Concepts de déploiement

Ces exemples lancent le programme serveur (e.g. Uvicorn), démarrant **un seul processus**, sur toutes les IPs (`0.0.
0.0`) sur un port prédéfini (par example, `80`).

C'est l'idée de base. Mais vous vous préoccuperez probablement de certains concepts supplémentaires, tels que ... :

* la sécurité - HTTPS
* l'exécution au démarrage

## Introduction

[Istio](https://istio.io/latest/docs/concepts/what-is-istio/) is an open platform for providing a uniform way to [integrate
microservices](https://istio.io/latest/docs/examples/microservices-istio/), manage [traffic flow](https://istio.io/latest/docs/concepts/traffic-management/) across microservices, enforce policies

* `datetime.timedelta`:
    * 🐍 `datetime.timedelta`.
    * 📨 & 📨 🔜 🎨 `float` 🌐 🥈.
    * Pydantic ✔ 🎦 ⚫️ "💾 8️⃣6️⃣0️⃣1️⃣ 🕰 ➕ 🔢", <a href="https://docs.pydantic.dev/latest/concepts/serialization/#json_encoders" class="external-link" target="_blank">👀 🩺 🌅 ℹ</a>.
* `frozenset`:
    * 📨 &amp; 📨, 😥 🎏 `set`:
        * 📨, 📇 🔜 ✍, ❎ ❎ &amp; 🏭 ⚫️ `set`.
        * 📨, `set` 🔜 🗜 `list`.

    * Em requisições e respostas será representado como um `float` de segundos totais.
    * O Pydantic também permite representá-lo como uma "codificação ISO 8601 diferença de tempo", <a href="https://docs.pydantic.dev/latest/concepts/serialization/" class="external-link" target="_blank">cheque a documentação para mais informações</a>.
* `frozenset`:
    * Em requisições e respostas, será tratado da mesma forma que um `set`:

// user or cluster provisioner, and referenced in the PodSpec. The Kubelet is
// responsible for resolving the RuntimeClassName reference before running the
// pod.  For more details, see
// https://kubernetes.io/docs/concepts/containers/runtime-class/
message RuntimeClass {
  // More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#metadata
  // +optional

    * В запросах и ответах будет представлен в виде общего количества секунд типа `float`.
    * Pydantic также позволяет представить его как "Кодировку разницы во времени ISO 8601", <a href="https://docs.pydantic.dev/latest/concepts/serialization/#json_encoders" class="external-link" target="_blank">см. документацию для получения дополнительной информации</a>.
* `frozenset`:
    * В запросах и ответах обрабатывается так же, как и `set`:

## Read the Tutorial first

The next sections assume you already read the main [Tutorial - User Guide: Security](../../tutorial/security/index.md){.internal-link target=_blank}.