* distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.common.cache;

import static com.google.common.cache.CacheBuilder.NULL_TICKER;
import static com.google.common.cache.LocalCache.DISCARDING_QUEUE;

如此，你可以學會關於容器與 Docker 的知識，並將這些知識重複運用到許多不同工具與元件上。

因此，你會執行多個容器，內容各不相同，例如一個資料庫、一個 Python 應用、一個帶有 React 前端應用的網頁伺服器，並透過它們的內部網路把它們連接在一起。

所有容器管理系統（例如 Docker 或 Kubernetes）都內建了這些網路功能。

## 容器與行程 { #containers-and-processes }

容器映像通常在其 metadata 中包含當容器啟動時應執行的預設程式或指令，以及要傳給該程式的參數。這與在命令列要執行的內容非常類似。

當容器啟動時，它會執行該指令/程式（雖然你可以覆寫它，讓它執行不同的指令/程式）。

只要主要行程（指令或程式）在執行，容器就會運作。

容器通常只有單一行程，但也可以由主要行程啟動子行程，如此你會在同一個容器內有多個行程。

			}
		})
	}
}

// Tests both object and bucket healing.
func TestHealing(t *testing.T) {
	ctx, cancel := context.WithCancel(t.Context())
	defer cancel()

	obj, fsDirs, err := prepareErasure16(ctx)
	if err != nil {
		t.Fatal(err)
	}
	defer obj.Shutdown(t.Context())

	// initialize the server and obtain the credentials and root.
	// credentials are necessary to sign the HTTP request.

	<groupId>org.codelibs</groupId>
	<artifactId>corelib</artifactId>
	<packaging>jar</packaging>
	<name>CodeLibs Core Library</name>
	<version>0.7.2-SNAPSHOT</version>
	<description>Core library providing essential utilities and functionalities.</description>
	<url>https://github.com/codelibs/corelib</url>
	<inceptionYear>2012</inceptionYear>
	<licenses>
		<license>
			<name>The Apache Software License, Version 2.0</name>

// 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.
//
// This program is distributed in the hope that it will be useful

// 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.
//
// This program is distributed in the hope that it will be useful

/*
 * Copyright 2012-2025 CodeLibs Project and the Others.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,

# 设置和环境变量 { #settings-and-environment-variables }

在许多情况下，你的应用可能需要一些外部设置或配置，例如密钥、数据库凭据、电子邮件服务的凭据等。

这些设置中的大多数是可变的（可能会改变），例如数据库 URL。并且很多可能是敏感的，比如密钥。

因此，通常会将它们提供为由应用程序读取的环境变量。

/// tip | 提示

要理解环境变量，你可以阅读[环境变量](../environment-variables.md)。

///

## 类型和验证 { #types-and-validation }

这些环境变量只能处理文本字符串，因为它们在 Python 之外，并且必须与其他程序及系统的其余部分兼容（甚至与不同的操作系统，如 Linux、Windows、macOS）。

/*
 * Copyright 2012-2025 CodeLibs Project and the Others.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,

/*
 * Copyright 2012-2025 CodeLibs Project and the Others.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,