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Container: Docker Compose on Ubuntu 16.04
容器：在 Ubuntu 16.04 中使用 Docker Compose
============================================================
[![docker compose logo](https://www.unixmen.com/wp-content/uploads/2017/06/docker-compose-logo-696x1226.png "docker-compose-logo")][3]
### What is Docker Compose
### 什么是 Docker Compose
[Docker Compose][4] 是一个运行多容器 Docker 应用的工具。Compose 通过一个配置文件来配置一个应用的服务，然后通过一个命令创建并启动所有在配置文件中指定的服务。
Docker Compose 适用于许多不同的项目，如：
[Docker Compose][4] is a tool for running multi-container Docker applications. To configure an application’s services with Compose we use a configuration file, and then, executing a single command, it is possible to create and start all the services specified in the configuration.
* **开发**：利用 Compose 命令行工具，我们可以创建一个隔离（可交互）的环境来承载正在开发中的应用程序。
通过使用 [Compose 文件][2]，开发者可以记录和配置所有应用程序的服务依赖关系。
* **自动测试**：此用例需求一个测试运行环境。Compose 提供了一种方便的方式来管理测试套件的隔离测试环境。完整的环境在 Compose 文件中定义。
Docker Compose is useful for many different projects like:
Docker Compose 是由[图][5]中的源码构建的，这个社区项目现在已经没有使用了。
* **Development**: with the Compose command line tools we create (and interact with) an isolated environment which will host the application being developed.
By using the [Compose file][2], developers document and configure all of the application’s service dependencies.
在本教程中，我们将看到如何在 Ubuntn 16.04 上安装 Docker Compose。
* **Automated testing**: this use case requires an environment for running tests in. Compose provides a convenient way to manage isolated testing environments for a test suite. The full environment is defined in the Compose file.
Docker Compose was made on the [Fig][5] source code, a community project now unused.
In this tutorial we will see how to install Docker Compose on an Ubuntu 16.04 machine.
### Install Docker
We need Docker in order to install Docker Compose. First, add the public key for the official Docker repository:
### 安装 Docker
我们需要安装 Docker 来安装 Docker Compose。首先为官方 Docker 仓库添加公钥。
```
$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add-
```
Next, add the Docker repository to `apt` sources list:
接下来，添加 Docker 仓库到 `apt` 源列表：
```
$ sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
```
Update the packages database and install Docker with `apt`:
更新包数据库，并使用 `apt` 安装 Docker
```
$ sudo apt-get update
$ sudo apt install docker-ce
```
At the end of the installation process, the Docker daemon should be started and enabled to load at boot time. We can check its status with the following command:
在安装进程结束后，Docker 守护程序应该已经启动并设为开机自启。我们可以通过下面的命令来查看它的状态：
```
$ sudo systemctl status docker
@ -51,69 +49,65 @@ $ sudo systemctl status docker
Active: active (running)
```
### Install Docker Compose
At this point it is possible to install Docker Compose. Download the current release by executing the following command:
### 安装 Docker Compose
现在可以安装 Docker Compose 了。通过执行以下命令下载当前版本。
```
# curl -L https://github.com/docker/compose/releases/download/1.14.0/docker-compose-`uname -s`-`uname -m` > /usr/local/bin/docker-compose
```
Make the downloaded binary executable:
为二进制文件添加执行权限：
```
# chmod +x /usr/local/bin/docker-compose
```
Check the Docker Compose version:
检查 Docker Compose 版本：
```
$ docker-compose -v
```
The output should be something like this:
输出应该如下：
```
docker-compose version 1.14.0, build c7bdf9e
```
### Testing Docker Compose
The Docker Hub includes a Hello World image for demonstration purposes, illustrating the configuration required to run a container with Docker Compose.
Create a new directory and move into it:
### 测试 Docker Compose
Docker Hub 包含了一个用于演示的 Hello World 镜像，可以用来说明使用 Docker Compose 来运行一个容器所需的配置。
创建并打开一个目录：
```
$ mkdir hello-world
$ cd hello-world
```
Create a new YAML file:
创建一个新的 YAML 文件：
```
$ $EDITOR docker-compose.yml
```
In this file paste the following content:
在文件中粘贴如下内容：
```
unixmen-compose-test:
image: hello-world
```
_**Note:** the first line is used as part of the container name._
_**注意:** 第一行是容器名称的一部分。_
Save and exit.
保存并退出。
#### Run the container
Next, execute the following command in the `hello-world` directory:
#### 运行容器
接下来，在 `hello-world` 目录执行以下命令：
```
$ sudo docker-compose up
```
If everything is correct, this should be the output shown by Compose:
如果一切正常，Compose 输出应该如下：
```
Pulling unixmen-compose-test (hello-world:latest)...
@ -148,18 +142,16 @@ unixmen-compose-test_1 |
helloworld_unixmen-compose-test_1 exited with code 0
```
Docker containers only run as long as the command is active, so the container will stop when the test finishes running.
### Conclusion
This concludes the tutorial about the installation of Docker Compose on an Ubuntu 16.04 machine. We have also seen how to create a simple project through the Compose file in YAML format.
Docker 容器只能在命令（译者注：此处应为容器中的命令）还处于活动状态时运行，因此当测试完成运行时，容器将停止运行。
### 结论
本文是关于在 Ubuntu 16.04 中安装 Docker Compose 的教程。我们还看到了如何通过一个 YAML 格式的 Compose 文件构建一个简单的项目。
--------------------------------------------------------------------------------
via: https://www.unixmen.com/container-docker-compose-ubuntu-16-04/
作者：[ Giuseppe Molica][a]
译者：[译者ID](https://github.com/译者ID)
译者：[Locez](https://github.com/locez)
校对：[校对者ID](https://github.com/校对者ID)
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