Mastering the Art of Docker Container Management

Introduction

In this lab, we will embark on a journey to the ancient kingdom of Dockeria where the mighty dragon, Dockeron, roams freely. Our goal is to master the art of starting and managing Docker containers to fulfill the ancient prophecy and earn the respect of Dockeron.

Skills Graph

%%%%{init: {'theme':'neutral'}}%%%% flowchart RL docker(("`Docker`")) -.-> docker/ContainerOperationsGroup(["`Container Operations`"]) docker/ContainerOperationsGroup -.-> docker/start("`Start Container`") subgraph Lab Skills docker/start -.-> lab-271499{{"`Docker Start Container`"}} end

Prepare the Docker Environment

In this step, we will prepare our Docker environment by ensuring that Docker is installed and running. Additionally, we will pull the hello-world Docker image and run a container based on this image.

Task 1: Install Docker

First, let's ensure that Docker is installed. If it's not installed, please install Docker for your specific operating system following the official documentation.

Task 2: Start Docker Service

Ensure that the Docker service is up and running by executing the following command in the terminal:

sudo systemctl start docker

Task 3: Pull and Run `hello-world` Image

Pull the hello-world Docker image by running the following command:

docker pull hello-world

Next, run a container based on the hello-world image using the following command:

docker run hello-world

Launch a Customized Container

In this step, we will create a Dockerfile to build a custom Docker image and run a container based on it.

Task 1: Create a Dockerfile

Create a file named Dockerfile under the /home/labex/project directory with the following contents:

FROM alpine
CMD echo "Welcome to Dockeria, the land of dragons!"

Task 2: Build and Run the Custom Image

Build the custom Docker image using the following command:

$ cd /home/labex/project
$ docker build -t dockeria-image .

Finally, run a container based on the newly built image:

$ cd /home/labex/project
$ docker run dockeria-image

Summary

In this lab, we ventured into the kingdom of Dockeria and harnessed the power of Docker containers. By completing the tasks, we have acquired the essential skills to start and manage Docker containers. This knowledge will be invaluable as we continue our adventures in the realm of containerization.

Docker Start Container