Docker on a Raspberry Pi

README.md

• Get a Raspberry
• Install Archlinux on it, see http://archlinuxarm.org/platforms/armv6/raspberry-pi
• Get latest package info: pacman -Sy
• install sudo pacman -S sudo
• create a user in group wheel useradd -m -G wheel -s /bin/bash pixelistik
• in /etc/sudoers allow everything to wheel group visudo, uncomment the %wheel line
• mkdir .ssh
• chmod 755 .ssh/
• nano .ssh/authorized_keys and paste public key
• chmod 644 .ssh/authorized_keys
• pacman -S docker
• add user to docker group to get permissions to run docker commands usermod -aG docker pixelistik
• start docker daemon sysctl start docker (sysctl enable docker probably makes it persistent)
• get a base image that matches the host docker pull sdhibit/rpi-arch (could probably be any other ARM-based Linux, e.g. Raspbian)
• write a Dockerfile
• build the docker image, saving it under a tag docker build -t estimation-poker .
• run the image, publishing port 5000: docker run -p 5000:5000 estimation-poker

Dockerfile

# Base on ARM image
FROM sdhibit/rpi-arch
# Install required packages
RUN pacman -Sy && pacman --noconfirm -S nodejs git
# Get app code
RUN git clone https://github.com/pixelistik/estimation-poker.git
WORKDIR estimation-poker
# Install dependencies
RUN npm install
# Define default command to run
ENTRYPOINT ["node", "server.js"]