README.md

docker_engine

This role installs Docker Engine following the installation guide and sets up execution from non-root users following the manual.

Inputs

None.

Manual Installation

Install Docker Engine:

# Taken from: https://docs.docker.com/engine/install/ubuntu/
# And: https://docs.docker.com/engine/install/linux-postinstall/

# Uninstall old versions
sudo apt-get remove docker docker-engine docker.io containerd runc

# Install using the repository
sudo apt-get update

sudo apt-get install \
    ca-certificates \
    curl \
    gnupg \
    lsb-release

# Add Docker’s official GPG key:
sudo mkdir -p /etc/apt/keyrings
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg

# Use the following command to set up the repository:
echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \
  $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

# Install Docker Engine
sudo apt-get update
sudo apt-get install docker-ce docker-ce-cli containerd.io docker-compose-plugin

# Verify that Docker Engine is installed correctly by running the hello-world image.
sudo docker run hello-world
# Note: This command downloads a test image and runs it in a container. When the container runs, it prints a message and exits.

Perform the post-installation steps:

# Post-installation steps for Linux

# Create the docker group.
sudo groupadd docker

# Add your user to the docker group.
sudo usermod -aG docker $USER

# Log out and log back in so that your group membership is re-evaluated.

# Verify that you can run docker commands without sudo
docker run hello-world
# Note: This command downloads a test image and runs it in a container. When the container runs, it prints a message and exits.