The Pi Hole project already has a nice Docker project utilizing compose. The Pi Hole Docker install is well documented and quite nicely done. After installing Docker on the Raspberry Pi it was an easy git clone, a couple of modifications to select my timezone and preferred DNS servers ( CloudFlare 1.1.1.1 ), then docker-compose up, and we were. The Raspberry Pi is a popular single-board computer designed to promote the teaching of computer science in schools. The use of the Raspberry Pi computer ranges from robotics to home automation. Many variations of the Raspberry Pi exist, such as the Raspberry Pi Zero, which is smaller than the more powerful Raspberry Pi 4. Learn how to install Portainer to your Raspberry Pi. Portainer is a Docker management tool that makes managing your containers a breeze. Creating and maintaining your Docker containers becomes a simple task when using this web interface. Docker pulls the correct image for the current architecture, so Raspberry Pis run the 32-bit Arm version and EC2 A1 instances run 64-bit Arm. The SHA tags identify a fully qualified image variant. You can also run images targeted for a different architecture on Docker Desktop.

Make sure to update Raspberry Pi frequently to avoid security and performance issues. If you are looking for other useful Raspberry tutorials, be sure to visit the Java Installation On Raspberry Pi and Ubuntu Mate Installation on Raspberry Pi 2 or 3 guides.

Estimated reading time: 5 minutes

Install Docker And Portainer Raspberry Pi

Docker images can support multiple architectures, which means that a singleimage may contain variants for different architectures, and sometimes for differentoperating systems, such as Windows.

When running an image with multi-architecture support, docker willautomatically select an image variant which matches your OS and architecture.

Most of the official images on Docker Hub provide a variety of architectures.For example, the busybox image supports amd64, arm32v5, arm32v6,arm32v7, arm64v8, i386, ppc64le, and s390x. When running this imageon an x86_64 / amd64 machine, the x86_64 variant will be pulled and run.

Docker Desktop provides binfmt_misc multi-architecture support,which means you can run containers for different Linux architecturessuch as arm, mips, ppc64le, and even s390x.

This does not require any special configuration in the container itself as it usesqemu-static from the Docker forMac VM. Because of this, you can run an ARM container, like the arm32v7 or ppc64levariants of the busybox image.

Buildx (Experimental)

Docker is now making it easier than ever to develop containers on, and for Arm servers and devices. Using the standard Docker tooling and processes, you can start to build, push, pull, and run images seamlessly on different compute architectures. Note that you don’t have to make any changes to Dockerfiles or source code to start building for Arm.

Docker And Raspberry Pi Configuration

Docker

Docker introduces a new CLI command called buildx. You can use the buildx command on Docker Desktop for Mac and Windows to build multi-arch images, link them together with a manifest file, and push them all to a registry using a single command. With the included emulation, you can transparently build more than just native images. Buildx accomplishes this by adding new builder instances based on BuildKit, and leveraging Docker Desktop’s technology stack to run non-native binaries.

For more information about the Buildx CLI command, see Buildx.

Install

  1. Download the latest version of Docker Desktop.

  2. Follow the on-screen instructions to complete the installation process. After you have successfully installed Docker Desktop, you will see the Docker icon in your task tray.

  3. Click About Docker Desktop from the Docker menu and ensure you have installed Docker Desktop version 2.0.4.0 (33772) or higher.

Build and run multi-architecture images

Run the command docker buildx ls to list the existing builders. This displays the default builder, which is our old builder.

Create a new builder which gives access to the new multi-architecture features.

Alternatively, run docker buildx create --name mybuilder --use to create a new builder and switch to it using a single command.

Docker

Switch to the new builder and inspect it.

Test the workflow to ensure you can build, push, and run multi-architecture images. Create a simple example Dockerfile, build a couple of image variants, and push them to Docker Hub.

And

Where, username is a valid Docker username.

Notes:

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  • The --platform flag informs buildx to generate Linux images for AMD 64-bit, Arm 64-bit, and Armv7 architectures.
  • The --push flag generates a multi-arch manifest and pushes all the images to Docker Hub.

Inspect the image using imagetools.

The image is now available on Docker Hub with the tag username/demo:latest. You can use this image to run a container on Intel laptops, Amazon EC2 A1 instances, Raspberry Pis, and on other architectures. Docker pulls the correct image for the current architecture, so Raspberry Pis run the 32-bit Arm version and EC2 A1 instances run 64-bit Arm. The SHA tags identify a fully qualified image variant. You can also run images targeted for a different architecture on Docker Desktop.

You can run the images using the SHA tag, and verify the architecture. For example, when you run the following on a macOS:

In the above example, uname -m returns aarch64 and armv7l as expected, even when running the commands on a native macOS developer machine.

mac, Multi-CPU architecture support
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