리눅스 컨테이너를 사용하는 데에는 **보안**, **반복 가능성**, **단순함** 등의 장점이 있습니다.

/// tip | "팁"

시간에 쫓기고 있고 이미 이런것들을 알고 있다면 [`Dockerfile`👇](#build-a-docker-image-for-fastapi)로 점프할 수 있습니다.

///

<details>
<summary>도커파일 미리보기 👀</summary>

```Dockerfile
FROM python:3.9

WORKDIR /code

COPY ./requirements.txt /code/requirements.txt

	public final fun body (Lokio/Buffer;)Lmockwebserver3/MockResponse$Builder;
	public final fun bodyDelay (JLjava/util/concurrent/TimeUnit;)Lmockwebserver3/MockResponse$Builder;
	public final fun build ()Lmockwebserver3/MockResponse;
	public final fun chunkedBody (Ljava/lang/String;I)Lmockwebserver3/MockResponse$Builder;
	public final fun chunkedBody (Lokio/Buffer;I)Lmockwebserver3/MockResponse$Builder;

//go:build ignore
// +build ignore

// Copyright (c) 2015-2021 MinIO, Inc.
//
// This file is part of MinIO Object Storage stack
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//

	// populate full pod snapshot from cgroups
	return s.scanProcForPodsAndCache(ambientPodUIDs)
}

func (s *NetServer) scanProcForPodsAndCache(pods map[types.UID]*corev1.Pod) error {
	// TODO: maybe remove existing uids in s.currentPodSnapshot from the filter set.
	res, err := s.podNs.FindNetnsForPods(pods)
	if err != nil {
		return err
	}

	for uid, wl := range res {
		s.currentPodSnapshot.UpsertPodCacheWithNetns(uid, wl)

        .socket(socket, route.address.url.host, source, sink)
        .listener(this)
        .pingIntervalMillis(pingIntervalMillis)
        .flowControlListener(flowControlListener)
        .build()
    this.http2Connection = http2Connection
    this.allocationLimit = Http2Connection.DEFAULT_SETTINGS.getMaxConcurrentStreams()
    http2Connection.start()
  }

  /**

```Dockerfile
COPY ./app /code/app
```

### 构建 Docker 镜像

现在所有文件都已就位，让我们构建容器镜像。

* 转到项目目录（在`Dockerfile`所在的位置，包含`app`目录）。
* 构建你的 FastAPI 镜像：


<div class="termy">

```console
$ docker build -t myimage .

---> 100%
```

</div>


/// tip

注意最后的 `.`，它相当于`./`，它告诉 Docker 用于构建容器镜像的目录。

在本例中，它是相同的当前目录（`.`）。

///

### 启动 Docker 容器

* 根据你的镜像运行容器：

      for (Class<?> param : method.getParameterTypes()) {
        signature.append(sep).append(typeName(param));
        sep = ", ";
      }
      methods.add(signature.append(")").toString());
    }
    return methods.build();
  }

  private static String typeName(Class<?> type) {
    return type.isArray() ? typeName(type.getComponentType()) + "[]" : type.getName();
  }

  public void testConstructor() throws Exception {

      ImmutableClassToInstanceMap.builder()
          .put(int.class, 1)
          .put(long.class, 1L)
          .put(double.class, 1.0)
          .put(TimeUnit.class, SECONDS)
          .build();

    FileSystem fs =
        Jimfs.newFileSystem(
            Configuration.unix().toBuilder()
                .setSupportedFeatures(ObjectArrays.concat(SYMBOLIC_LINKS, supportedFeatures))
                .build());
    Files.createDirectories(fs.getPath("dir/b/i/j/l"));
    Files.createFile(fs.getPath("dir/a"));
    Files.createFile(fs.getPath("dir/c"));
    Files.createSymbolicLink(fs.getPath("dir/d"), fs.getPath("b/i"));

      ImmutableClassToInstanceMap.builder()
          .put(int.class, 1)
          .put(long.class, 1L)
          .put(double.class, 1.0)
          .put(TimeUnit.class, SECONDS)
          .build();