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Install Docker on Ubuntu 20.04 LTS

Here’s the script how to install Docker on Ubuntu 20.04 LTS.

#!/bin/bash
sudo apt-get update
# install dependencies
sudo apt-get -y install apt-transport-https ca-certificates curl software-properties-common
# add the gpg key for docker
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
# add the repository in the Linux mint 20
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(. /etc/os-release; echo "$UBUNTU_CODENAME") stable"
sudo apt-get update
# install docker e docker-compose
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(. /etc/os-release; echo "$UBUNTU_CODENAME") stable"
sudo apt-get -y install docker-ce docker-compose
# add the user system to sudo group, no sudo command
sudo usermod -aG docker $USER
# prints docker version =)
docker --version

Run Docker Compose

Here’s how to run docker-compose. I have an Icecast docker-compose.yml file. Icecast is an audio streaming server.

version: "2"
 
services:
  icecast:
    image: moul/icecast
    environment:
      - ICECAST_SOURCE_PASSWORD=secret
      - ICECAST_ADMIN_PASSWORD=secret
      - ICECAST_PASSWORD=secret
      - ICECAST_RELAY_PASSWORD=secret
    ports:
      - "8000:8000"
    restart: always

To run Icecast in a container , I run docker-compose in the background.

docker-compose up -d

Check to see if Icecast is running on your browser.

http://localhost:8000

To stop the Icecast container, I simply stop the docker-compose.

docker-compose stop

Here are the other docker commands you can run.

docker images
docker ps
docker-compose ps

Docker to GCR

Here’s a couple of steps to move a Docker image to the Google Container Registry.

Create a container image.

docker build -t gcr.io/${PROJECT_ID}/my-app:v1 .

Push image to GCR.

docker push gcr.io/[PROJECT-ID]/[IMAGE]