https://dev.to/dbanty/why-i-m-leaving-flask-3ki6 title: Why I'm Leaving Flask - author: Mike Moritz author_link: https://medium.com/@mike.p.moritz link: https://medium.com/@mike.p.moritz/using-docker-compose-to-deploy-a-lightweight-python-rest-api-with-a-job-queue-37e6072a209b title: Using Docker Compose to deploy a lightweight Python REST API with a job queue - author: '@euri10' author_link: https://gitlab.com/euri10 link: https://gitlab.com/euri10/fastapi_cheatsheet title: A FastAPI and Swagger UI...

### Beispieltools zur Ausführung beim Hochfahren

Einige Beispiele für Tools, die diese Aufgabe übernehmen können, sind:

* Docker
* Kubernetes
* Docker Compose
* Docker im Schwarm-Modus
* Systemd
* Supervisor
* Es wird intern von einem Cloud-Anbieter im Rahmen seiner Dienste verwaltet
* Andere ...

In den nächsten Kapiteln werde ich Ihnen konkretere Beispiele geben.

Existe uma variável de ambiente **especial** chamada **`PATH`** que é usada pelos sistemas operacionais (Linux, macOS, Windows) para encontrar programas para executar.

O valor da variável `PATH` é uma longa string composta por diretórios separados por dois pontos `:` no Linux e macOS, e por ponto e vírgula `;` no Windows.

Por exemplo, a variável de ambiente `PATH` poderia ter esta aparência:

//// tab | Linux, macOS

```plaintext

        // has already been moved.
        parent = elementData(removeIndex);
      } else {
        parent = elementData(getParentIndex(removeIndex));
      }
      // bubble it up the opposite heap
      if (otherHeap.bubbleUpAlternatingLevels(crossOver, toTrickle) < removeIndex) {
        return new MoveDesc<>(toTrickle, parent);
      } else {
        return null;
      }
    }

### Примеры инструментов, управляющих запуском программ

Вот несколько примеров, которые могут справиться с такой задачей:

* Docker
* Kubernetes
* Docker Compose
* Docker в режиме Swarm
* Systemd
* Supervisor
* Использование услуг облачного провайдера
* Прочие...

Я покажу Вам некоторые примеры их использования в следующих главах.

## Перезапуск

### Example Tools to Run at Startup

Some examples of the tools that can do this job are:

* Docker
* Kubernetes
* Docker Compose
* Docker in Swarm Mode
* Systemd
* Supervisor
* Handled internally by a cloud provider as part of their services
* Others...

I'll give you more concrete examples in the next chapters.

## Restarts

/// note

Dans ce cas-là, **FastAPI** ne vérifiera pas le contenu de la liste.

Par exemple, `List[int]` vérifiera (et documentera) que la liste est bien entièrement composée d'entiers. Alors qu'un simple `list` ne ferait pas cette vérification.

///

## Déclarer des métadonnées supplémentaires

On peut aussi ajouter plus d'informations sur le paramètre.

  }

  public void testDeadlock_twoLocks() {
    // Establish an acquisition order of lockA -> lockB.
    lockA.lock();
    lockB.lock();
    lockA.unlock();
    lockB.unlock();

    // The opposite order should fail (Policies.THROW).
    PotentialDeadlockException firstException = null;
    lockB.lock();
    PotentialDeadlockException expected =

  }

  public void testDeadlock_twoLocks() {
    // Establish an acquisition order of lockA -> lockB.
    lockA.lock();
    lockB.lock();
    lockA.unlock();
    lockB.unlock();

    // The opposite order should fail (Policies.THROW).
    PotentialDeadlockException firstException = null;
    lockB.lock();
    PotentialDeadlockException expected =

### 单独的程序

为了实现这一点，您通常会有一个**单独的程序**来确保您的应用程序在启动时运行。 在许多情况下，它还可以确保其他组件或应用程序也运行，例如数据库。

### 启动时运行的示例工具

可以完成这项工作的工具的一些示例是：

* Docker
* Kubernetes
* Docker Compose
* Docker in Swarm Mode
* Systemd
* Supervisor
* 作为其服务的一部分由云提供商内部处理
* 其他的...

我将在接下来的章节中为您提供更具体的示例。


## 重新启动

与确保应用程序在启动时运行类似，您可能还想确保它在挂掉后**重新启动**。

### 我们会犯错误