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161 lines
4.7 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: ( )
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[#]: publisher: ( )
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[#]: url: ( )
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Getting Started with Podman on Fedora
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======
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![][1]
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Podman logo from the Podman project <https://github.com/containers/podman/tree/main/logo>
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[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.
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### Install Podman
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Podman command is the same as [docker][3] just type in your terminal **alias docker=podman** if you have docker already installed
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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:
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```
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sudo dnf install podman
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```
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For fedora [silverblue][4] users, podman is already installed in your OS.
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After installation, run the hello world image to ensure everything is working:
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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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If everything is working well you will see the following output in your terminal:
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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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### Simple Nodejs App
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First, we will create a folder **webapp** , type the following command in your terminal
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```
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mkdir webapp && cd webapp
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```
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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 ._
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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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Create the file _index.js_ and add the following code there:
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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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You can download source code from [here][5].
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### Create Dockerfile
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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:
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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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Be sure you are inside the folder _webapp_ then show the image and then type the following command:
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```
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podman build .
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```
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Make sure to add the **dot**. The image is created on your machine and you can show it using the following command:
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```
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podman images
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```
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The last step is to run the image inside a container by typing the following command:
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```
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podman run -p 8080:8080 <image-name>
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```
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Now open your browser in _localhost:8080_ and you will see that your app works.
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### Stopping and Remove Container
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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:
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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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You can delete the images from your machine by using the following command:
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```
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podman rmi <image_id>
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```
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Read more about podman and how it works on the [official website][2]
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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：[译者ID](https://github.com/译者ID)
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校对：[校对者ID](https://github.com/校对者ID)
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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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