Installation of dependencies#

 sudo apt-get update && sudo apt-get install \
    apt-transport-https \
    ca-certificates \
    curl \
    gnupg \
    lsb-release

Add the official GPG key#

curl -fsSL https://download.docker.com/linux/debian/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg

Add the stable repo#

echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/debian \
  $(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

O To validate the intervention requests during installation.

Verify our docker installation

sudo docker run hello-world

Hello from Docker!
This message shows that your installation appears to be working correctly.

To generate this message, Docker took the following steps:
 1. The Docker client contacted the Docker daemon.
 2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
    (amd64)
 3. The Docker daemon created a new container from that image which runs the
    executable that produces the output you are currently reading.
 4. The Docker daemon streamed that output to the Docker client, which sent it
    to your terminal.

To try something more ambitious, you can run an Ubuntu container with:
 $ docker run -it ubuntu bash

Share images, automate workflows, and more with a free Docker ID:
 https://hub.docker.com/

For more examples and ideas, visit:
 https://docs.docker.com/get-started/

TIP

Your installation is successful!

Create an Apache Container#

As an example, we will create an Apache container

docker run -d --name docker-apache -v /var/www/:/usr/local/apache2/htdocs/ -p 3000:80 httpd

Let’s break down the command above:

docker run allows you to launch a container or install it if it doesn’t exist
-d detaches from the container
--name CONTAINER_NAME
-v for “Volume”, path on machine path
-p To specify local_port (http://MACHINE_IP:3000)
httpd the name of the Apache image, could be nginx in case of a nginx installation.

The run command will apply all options to the service installation.

Display Docker Containers#

docker ps

docker ps displays the active containers.

docker -a

docker ps -a displays all containers.

The Docker Hub#

The Docker Hub is like the Android play store.
It allows us to find container installation images, official or not, as well as their documentation.