选题[tech]: 20231030 Install Docker on Arch Linux

sources/tech/20231030 Install Docker on Arch Linux.md

sources/tech/20231030 Install Docker on Arch Linux.md

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+[#]: subject: "Install Docker on Arch Linux"
+[#]: via: "https://itsfoss.com/install-docker-arch-linux/"
+[#]: author: "Abhishek Prakash https://itsfoss.com/author/abhishek/"
+[#]: collector: "lujun9972/lctt-scripts-1693450080"
+[#]: translator: " "
+[#]: reviewer: " "
+[#]: publisher: " "
+[#]: url: " "
+
+Install Docker on Arch Linux
+======
+
+Installing Docker on Arch Linux is easy. It is available in the Extra repository and you can simply [do the pacman magic][1]:
+
+```
+
+    sudo pacman -S docker
+
+```
+
+But there are more steps involved here to run Docker on Arch Linux properly.
+
+### Making Arch Docker ready
+
+It all comes down to these steps:
+
+  * Install Docker from Arch repository
+  * Start the Docker daemon and run it automatically at each boot
+  * Add user to docker group to run docker commands without sudo
+
+
+
+Let's see the steps in detail.
+
+#### Step 1: Installing Docker package
+
+Open the terminal and use the following command:
+
+```
+
+    sudo pacman -S docker
+
+```
+
+Enter the password and press Y when asked for it.
+
+![][2]
+
+It may take some time depending on the mirror you are using.
+
+💡
+
+If you see a package not found or 404 error, your sync database is perhaps old. Update the system (it will download a lot of packages and take time) with: sudo pacman -Syu
+
+#### Step 2: Start docker daemon
+
+Docker is installed but it is not running. You should start the dcoker daemon before **running the Docker command for the first time** :
+
+```
+
+    sudo systemctl start docker.service
+
+```
+
+I also suggest enabling the Docker service so that the docker daemon starts automatically when your system boots.
+
+```
+
+    sudo systemctl enable docker.service
+
+```
+
+This way, you can just start running docker commands. You won't need to manually start the docker service anymore.
+
+![][3]
+
+#### Step 3: Add user to docker group
+
+Docker is installed and the Docker service is running. You are almost ready to run docker commands.
+
+However, by default, you need to use sudo with docker commands. And that's annoying.
+
+To avoid using sudo with each docker command, you can add yourself (or any other user) to the docker group like this:
+
+```
+
+    sudo usermod -aG docker $USER
+
+```
+
+**You must log out (or close the terminal) and log back in for the above change to take effect. If you don't want to do that, use this command:**
+
+```
+
+    newgrp docker
+
+```
+
+Now the stage is set. Let's test it.
+
+#### Step 4: Verify docker installation
+
+There is a tiny docker image provided by docker itself to test the docker installation. Run it and see if everything works well:
+
+```
+
+    docker run hello-world
+
+```
+
+You should see output like this for successful docker run:
+
+![][4]
+
+Congratulations! You have successfully installed Docker on Arch Linux.
+
+### Optional: Install Docker Compose
+
+Docker Compose has become an integral part of Docker. It allows you to manage multiple container applications.
+
+The older classic compose is provided by the `docker-compose` Python package. Docker has also ported it to Go and provides it with `docker compose` but this package comes with [Docker Desktop][5].
+
+At this stage, I would suggest going with the classic docker-compose plugin and install it with this command:
+
+```
+
+    sudo pacman -S docker-compose
+
+```
+
+![][6]
+
+### Troubleshooting Tips
+
+Here are some common issues you may face and the possible solutions:
+
+#### Tab completion not working for docker sub commands
+
+If you want to use tab completion for the docker command options (like completing im to images etc), install the bash-completion package:
+
+```
+
+    sudo pacman -S bash-completion
+
+```
+
+Close the terminal and start a new one. You should be able to use tab completion with Docker commands now.
+
+#### Cannot connect to the Docker daemon error
+
+If you see the following error:
+
+```
+
+    docker: Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?.
+    See 'docker run --help'.
+
+```
+
+That's because the docker daemon is not running. Refer to step 2 and start the docker service, make sure it is running and enable it so that docker daemon runs automatically at each boot.
+
+```
+
+    sudo systemctl start docker.service
+
+    sudo systemctl enable docker.service
+
+```
+
+#### Permission denied while trying to connect to Docker daemon socket
+
+If you see this error:
+
+```
+
+    docker: permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Post "http://%2Fvar%2Frun%2Fdocker.sock/v1.24/containers/create": dial unix /var/run/docker.sock: connect: permission denied.
+    See 'docker run --help'.
+
+```
+
+That's because you need to either run the docker command with sudo or add the user to docker group to run docker commands without sudo.
+
+I hope this quick post helps you run Docker on Arch Linux.
+
+--------------------------------------------------------------------------------
+
+via: https://itsfoss.com/install-docker-arch-linux/
+
+作者：[Abhishek Prakash][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://itsfoss.com/author/abhishek/
+[b]: https://github.com/lujun9972
+[1]: https://itsfoss.com/pacman-command/
+[2]: https://itsfoss.com/content/images/2023/10/installing-docker-arch-linux.png
+[3]: https://itsfoss.com/content/images/2023/10/start-docker-daemon-arch-linux.png
+[4]: https://itsfoss.com/content/images/2023/10/docker-running-successfully-arch-linux.png
+[5]: https://www.docker.com/products/docker-desktop/
+[6]: https://itsfoss.com/content/images/2023/10/install-docker-compose.png