> For the complete documentation index, see [llms.txt](https://moekiwisama-1.gitbook.io/minecraft-docker/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://moekiwisama-1.gitbook.io/minecraft-docker/ji-yu-alpine-zhi-zuo-image/bian-xie-dockerfile.md).

# 编写 Dockerfile

我们能不能把刚刚的那些操作制作成 Docker Image呢？当然可以，我们需要用到 Dockerfile

Dockerfile 是一个用来描述 Docker Image 制作过程的一个文件。\
根据上文的描述，启动 Minecraft 服务器需要那么几个步骤：

* 获取 azul/zulu-openjdk-alpine:16:0.0
* 创建服务器目录 /app
* 获取一份 paper-spigot
* 添加开服脚本，同意 Eula
* 启动开服脚本

实际上，编写 Dockerfile 也是那么几个步骤

### 准备步骤

首先我们创建一个目录来存放我们需要用到的东西

```bash
mkdir docker-playground
cd docker-playground
```

获取我们需要的东西

* 一份 paper
* 一份 eula
* 一份脚本

我们可以先获取 paper

```bash
mkdir temp
wget -O "temp/paper-1.17.jar"  https://papermc.io/api/v1/paper/1.17/latest/download
```

然后存放一份eula到scripts目录

```bash
mkdir scripts
echo "eula=false" > scripts/eula.txt
```

最后我们需要开服脚本

```bash
echo "sed -i 's/false/true/g' eula.txt" > scripts/start.sh
echo "java -Xmx2G -jar paper-1.17.jar" >> scripts/start.sh
```

当然，你也可以用你喜欢的编辑器来准备这些文件，不一定要用 echo\
我们还需要一个叫做 Dockerfile 的空文件，等会儿我们再编写它\
至此为止，我们已经有了我们所需要的的所有东西

```
├── Dockerfile
├── scripts
│   ├── eula.txt
│   └── start.sh
└── temp
    └── paper-1.17.jar
```

### 编写 Dockerfile

Dockerfile 的内容跟前文描述的几乎一致，主要用到的指令几乎完全可以按照字面意思理解

```bash
FROM azul/zulu-openjdk-alpine:16.0.0 # 基于azul/zulu-openjdk-alpine:16:0.0
RUN mkdir /app # 创建服务器目录 /app
ADD ./temp/paper-1.17.jar /app # 复制本地的paper到image
ADD ./scripts/start.sh /app # 添加开服脚本
ADD ./scripts/eula.txt /app # 添加 eula
WORKDIR /app # 设置工作目录
ENTRYPOINT ["sh", "/app/start.sh"] # 执行开服脚本
```

这样，Dockerfile 就制作完了，我们可以开始构建镜像了

```bash
docker build -t localhost/my-minecraft-server-image:0.0.1 .
```

这样就可以制作一个localhost/my-minecraft-server-image，版本号为0.0.1的镜像了

### 试一试刚刚制作的 Image

我们可以将服务运行在25567端口

```bash
docker run -it -p 25567:25565 localhost/my-minecraft-server-image:0.0.1
```

![](/files/-McyAOuroGPdkzYcTpA-)

当然，Minecraft 也是可以连接上去的


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