选题[tech]: 20210714 Getting Started with Podman on Fedora

sources/tech/20210714 Getting Started with Podman on Fedora.md
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+[#]: subject: (Getting Started with Podman on Fedora)
+[#]: via: (https://fedoramagazine.org/getting-started-with-podman-in-fedora/)
+[#]: author: (Yazan Monshed https://fedoramagazine.org/author/yazanalmonshed/)
+[#]: collector: (lujun9972)
+[#]: translator: ( )
+[#]: reviewer: ( )
+[#]: publisher: ( )
+[#]: url: ( )
+
+Getting Started with Podman on Fedora
+======
+
+![][1]
+
+Podman logo from the Podman project <https://github.com/containers/podman/tree/main/logo>
+
+[Podman][2] is a daemonless container engine for developing, managing, and running OCI Containers on your Linux System. In this article, we will introduce podman and how to use it with a small application build using nodejs. The app will be very simple and clean.
+
+### Install Podman
+
+Podman command is the same as [docker][3] just type in your terminal **alias docker=podman** if you have docker already installed
+
+Podman is installed by default in Fedora. But if you don’t have it for any reason, you can install it using the following command:
+
+```
+sudo dnf install podman
+```
+
+For fedora [silverblue][4] users, podman is already installed in your OS.
+
+After installation, run the hello world image to ensure everything is working:
+
+```
+podman pull hello-world
+podman run hello-world
+```
+
+If everything is working well you will see the following output in your terminal:
+
+```
+Hello from Docker!
+This message shows that your installation appears to be working correctly.
+ To generate this message, Docker took the following steps:
+  1.The Docker client contacted the Docker daemon.
+  2.The Docker daemon pulled the "hello-world" image from the Docker Hub. (amd64)
+  3.The Docker daemon created a new container from that image which runs the executable that produces the output you are currently reading.
+  4.The Docker daemon streamed that output to the Docker client, which sent it to your terminal.
+ To try something more ambitious, you can run an Ubuntu container with:
+  $ docker run -it ubuntu bash
+ Share images, automate workflows, and more with a free Docker ID:
+  https://hub.docker.com/
+ For more examples and ideas, visit:
+  https://docs.docker.com/get-started/
+```
+
+### Simple Nodejs App
+
+First, we will create a folder **webapp** , type the following command in your terminal
+
+```
+mkdir webapp && cd webapp
+```
+
+Now create the file ****_package.json_ This file includes all the dependencies that the project needs to work well. Copy the following code inside the file _package.json ._
+
+```
+{
+       "dependencies": {
+               "express": "*"
+       },
+       "scripts": {
+               "start": "node index.js"
+       }
+}
+```
+
+Create the file _index.js_ and add the following code there:
+
+```
+const express = require('express')
+
+const app = express();
+
+app.get('/', (req, res)=> {
+       res.send("Hello World!")
+});
+app.listen(8081, () => {
+       console.log("Listing on port 8080");
+});
+```
+
+You can download source code from [here][5].
+
+### Create Dockerfile
+
+First of all, create a file called _Dockerfile_ and make sure the first character is a capital, NOT lower case, then add the following code there:
+
+```
+FROM node:alpine
+WORKDIR usr/app
+COPY ./ ./
+RUN npm install
+CMD ["npm", "start"]
+```
+
+Be sure you are inside the folder _webapp_ then show the image and then type the following command:
+
+```
+podman build .
+```
+
+Make sure to add the **dot**. The image is created on your machine and you can show it using the following command:
+
+```
+podman images
+```
+
+The last step is to run the image inside a container by typing the following command:
+
+```
+podman run -p 8080:8080 <image-name>
+```
+
+Now open your browser in _localhost:8080_ and you will see that your app works.
+
+### Stopping and Remove Container
+
+To exit from the container use _CTRL-C._ You can remove the container by using the container id. Get the id and stop the container using these commands:
+
+```
+podman ps -a
+podman stop <container_id>
+```
+
+You can delete the images from your machine by using the following command:
+
+```
+podman rmi <image_id>
+```
+
+Read more about podman and how it works on the [official website][2]
+
+--------------------------------------------------------------------------------
+
+via: https://fedoramagazine.org/getting-started-with-podman-in-fedora/
+
+作者：[Yazan Monshed][a]
+选题：[lujun9972][b]
+译者：[译者ID](https://github.com/译者ID)
+校对：[校对者ID](https://github.com/校对者ID)
+
+本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
+
+[a]: https://fedoramagazine.org/author/yazanalmonshed/
+[b]: https://github.com/lujun9972
+[1]: https://fedoramagazine.org/wp-content/uploads/2020/06/Get_Started_w_Podman_on_Fedora-816x345.jpg
+[2]: https://podman.io/
+[3]: https://www.docker.com/
+[4]: https://silverblue.fedoraproject.org/
+[5]: https://github.com/YazanALMonshed/webapp