install-docker

#!/bin/bash

# remove previously installed Docker or lxc (if any)
echo -e "[cleaning previous docker or lxc installations...]\n"
sudo apt-get remove docker docker-engine docker.io* lxc-docker*
echo -e "[done]"

# refresh apt-get cache
echo -e "[refresh apt-get cache...]\n"
export DEBIAN_FRONTEND="noninteractive"
sudo apt-get update
echo -e "[done]\n"

# install dependencies for certs
echo -e "[installating depedencies...]\n"
sudo apt-get install -y apt-transport-https ca-certificates curl gnupg2 software-properties-common
echo -e "[done]\n"

# add Docker repo gpg key
echo -e "[adding docker key to apt-key...]\n"
curl -fsSL https://download.docker.com/linux/debian/gpg | sudo apt-key add -
echo -e "[done]\n"

# add docker repo to repo list
echo -e "[adding docker repo to apt...]\n"
echo "deb [arch=amd64] https://download.docker.com/linux/debian stretch stable" > /etc/apt/sources.list.d/docker.list 
sudo apt-get update
echo -e "[done]\n"

# install Docker
echo -e "[installing docker...]\n"
sudo apt-get install -y docker-ce
echo -e "[done]\n"

# manage Docker as a non-root user
echo -e "[creating docker user-group...]\n"
sudo groupadd docker
sudo usermod -aG docker $USER
echo -e "[done]\n"

# run Hellow World image to test installation
echo -e "[testing docker instalation...]\n"
sudo docker run hello-world
echo -e "[done]\n"

# configure Docker to start on boot
echo -e "[enabling docker autostart at boot...]\n"
sudo systemctl enable docker
echo -e "[done]\n"