Installing and testing Docker on Raspberry Pi.

Use the following code to install Docker on Raspberry Pi. I have tested that it works on Raspberry Pi 3 B+. This code is taken almost verbatim from withblue.ink/2019/07/13/yes-you-can-run-docker-on-raspbian.html.

# Install some required packages first
sudo apt update
sudo apt update
sudo apt install -y \
     apt-transport-https \
     ca-certificates \
     curl \
     gnupg2 \
     software-properties-common

# Get the Docker signing key for packages
curl -fsSL https://download.docker.com/linux/$(. /etc/os-release; echo "$ID")/gpg | sudo apt-key add -

# Add the Docker official repos
echo "deb [arch=armhf] https://download.docker.com/linux/$(. /etc/os-release; echo "$ID") \
     $(lsb_release -cs) stable" | \
    sudo tee /etc/apt/sources.list.d/docker.list

# Install Docker
sudo apt update
sudo apt install -y \
    docker-ce \
    cgroupfs-mount

To start Docker:

sudo systemctl enable docker
sudo systemctl start docker

To pull a lightweight OS for Docker running on Raspberry Pi 3 B+ try Alpine Linux:

sudo docker pull arm32v7/alpine

After executing the command get the image ID to continue:

sudo docker images

[email protected]:~ $ sudo docker images
REPOSITORY       TAG       IMAGE ID       CREATED       SIZE
arm32v7/alpine   latest    3e8172af00ce   5 weeks ago   3.82MB

Get inside by issuing the following command. Notice that you are at another prompt now. To confirm that you are inside your container try “ls” to get a directory listing and you should notice you are indeed in Alpine now. Use “exit” to get back to your Raspberry Pi prompt.

sudo docker run -it  3e8172af00ce sh

[email protected]:~ $ sudo docker run -it  3e8172af00ce sh
/ # ls
bin    dev    etc    home   lib    media  mnt    opt    proc   root   run    sbin   srv    sys    tmp    usr    var
/ # exit
[email protected]:~ $