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159 lines
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159 lines
4.5 KiB
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[#]: subject: (Getting Started with Podman on Fedora)
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[#]: via: (https://fedoramagazine.org/getting-started-with-podman-in-fedora/)
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[#]: author: (Yazan Monshed https://fedoramagazine.org/author/yazanalmonshed/)
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[#]: collector: (lujun9972)
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[#]: translator: (geekpi)
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[#]: reviewer: (wxy)
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[#]: publisher: (wxy)
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[#]: url: (https://linux.cn/article-13615-1.html)
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如何在 Fedora 上使用 Podman
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======
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![][1]
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[Podman][2] 是一个无守护程序的容器引擎,用于在你的 Linux 系统上开发、管理和运行 OCI 容器。在这篇文章中,我们将介绍 Podman 以及如何用 nodejs 构建一个小型应用来使用它。该应用将是非常简单和干净的。
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### 安装 Podman
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Podman 的命令就与 [docker][3] 相同,如果你已经安装了 Docker,只需在终端输入 `alias docker=podman`。
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在 Fedora 中,Podman 是默认安装的。但是如果你因为任何原因没有安装,你可以用下面的命令安装它:
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```
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sudo dnf install podman
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```
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对于 Fedora [silverblue][4] 用户,Podman 已经安装在你的操作系统中了。
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安装后,运行 “hello world” 镜像,以确保一切正常:
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```
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podman pull hello-world
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podman run hello-world
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```
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如果一切运行良好,你将在终端看到以下输出:
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```
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Hello from Docker!
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This message shows that your installation appears to be working correctly.
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To generate this message, Docker took the following steps:
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1.The Docker client contacted the Docker daemon.
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2.The Docker daemon pulled the "hello-world" image from the Docker Hub. (amd64)
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3.The Docker daemon created a new container from that image which runs the executable that produces the output you are currently reading.
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4.The Docker daemon streamed that output to the Docker client, which sent it to your terminal.
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To try something more ambitious, you can run an Ubuntu container with:
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$ docker run -it ubuntu bash
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Share images, automate workflows, and more with a free Docker ID:
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https://hub.docker.com/
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For more examples and ideas, visit:
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https://docs.docker.com/get-started/
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```
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### 简单的 Nodejs 应用
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首先,我们将创建一个文件夹 `webapp`,在终端输入以下命令:
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```
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mkdir webapp && cd webapp
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```
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现在创建文件 `package.json`,该文件包括项目运行所需的所有依赖项。在文件 `package.json` 中复制以下代码:
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```
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{
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"dependencies": {
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"express": "*"
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},
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"scripts": {
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"start": "node index.js"
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}
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}
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```
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创建文件 `index.js`,并在其中添加以下代码:
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```
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const express = require('express')
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const app = express();
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app.get('/', (req, res)=> {
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res.send("Hello World!")
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});
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app.listen(8081, () => {
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console.log("Listing on port 8080");
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});
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```
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你可以从 [这里][5] 下载源代码。
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### 创建 Dockerfile
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首先,创建一个名为 `Dockerfile` 的文件,并确保第一个字符是大写,而不是小写,然后在那里添加以下代码:
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```
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FROM node:alpine
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WORKDIR usr/app
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COPY ./ ./
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RUN npm install
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CMD ["npm", "start"]
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```
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确保你在 `webapp` 文件夹内,然后显示镜像,然后输入以下命令:
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```
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podman build .
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```
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确保加了 `.`。镜像将在你的机器上创建,你可以用以下命令显示它:
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```
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podman images
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```
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最后一步是输入以下命令在容器中运行该镜像:
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```
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podman run -p 8080:8080 <image-name>
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```
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现在在你的浏览器中打开 `localhost:8080`,你会看到你的应用已经工作。
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### 停止和删除容器
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使用 `CTRL-C` 退出容器,你可以使用容器 ID 来删除容器。获取 ID 并使用这些命令停止容器:
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```
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podman ps -a
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podman stop <container_id>
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```
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你可以使用以下命令从你的机器上删除镜像:
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```
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podman rmi <image_id>
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```
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在 [官方网站][2] 上阅读更多关于 Podman 和它如何工作的信息。
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--------------------------------------------------------------------------------
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via: https://fedoramagazine.org/getting-started-with-podman-in-fedora/
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作者:[Yazan Monshed][a]
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选题:[lujun9972][b]
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译者:[geekpi](https://github.com/geekpi)
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校对:[wxy](https://github.com/wxy)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译,[Linux中国](https://linux.cn/) 荣誉推出
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[a]: https://fedoramagazine.org/author/yazanalmonshed/
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[b]: https://github.com/lujun9972
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[1]: https://fedoramagazine.org/wp-content/uploads/2020/06/Get_Started_w_Podman_on_Fedora-816x345.jpg
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[2]: https://podman.io/
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[3]: https://www.docker.com/
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[4]: https://silverblue.fedoraproject.org/
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[5]: https://github.com/YazanALMonshed/webapp
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