Docker Container Creation and Management
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Questions and Answers

What is the difference between containerization and virtualization?

Containerization allows multiple applications to run on the same operating system kernel, while virtualization allows multiple operating systems to run on a single physical machine.

You can build and run Docker containers using the ______.

command line

What is the purpose of a Dockerfile?

To configure a Docker image.

Which tool is used to manage a multi-container application?

<p>Docker Compose</p> Signup and view all the answers

What command is used to build a Docker image from a Dockerfile?

<p>docker build</p> Signup and view all the answers

What command lists the containers currently available?

<p>sudo docker container ls --all</p> Signup and view all the answers

The command docker run is used to create a new Docker container.

<p>False</p> Signup and view all the answers

What is the command to remove a container?

<p>sudo docker container rm [container_name]</p> Signup and view all the answers

To check for the environment variable, you type echo $______.

<p>EXAMPLEVAR</p> Signup and view all the answers

Which command is used to view the contents of a file in the terminal?

<p>cat</p> Signup and view all the answers

What command allows you to see detailed information about a Docker image?

<p>sudo docker image inspect [image_name]</p> Signup and view all the answers

Study Notes

Lab Overview

  • Lab focuses on creating and running Docker containers and multi-container applications
  • Includes three parts: creating a container, configuring a multi-container application, and using Docker Compose for multi-container management

Learning Objectives

  • Distinguish between containerization and virtualization
  • Build and run Docker containers using command line
  • Configure Docker images using a Dockerfile
  • Manage Docker networks through command line
  • Manage multi-container applications with Docker Compose

Hands-on Demonstration

  • Part 1: Creating and running a Docker container
    • Create a Docker container named "testc" from image "test"
    • Start the container and access it through the shell
    • Check for an environment variable and list files within the container
    • Stop and remove the container
    • Run the container again and output the file contents
  • Part 2: Configuring an application with multiple containers
    • Check for available images in the registry
    • Build and run container images for both an application and database
    • Interact with the running containers
    • Access application from other containers
  • Part 3: Managing a Multi-Container Application with Docker Compose
    • Define application services and configurations in a Docker Compose file
    • Build and run the multi-container application using Docker Compose
    • Test the application by checking container status and accessing services
    • Stop and restart services using the docker-compose command

Tools and Software

  • Docker
  • Docker Compose
  • Ubuntu Desktop with Terminal
  • curl for registry access

Deliverables

  • Lab report containing screenshots of the following:
    • Successful "test" image build
    • Working directory, files, and environment variable in the "testc" container
    • The contents of file_1.txt in the "testc" container
    • Docker Compose commands and status output

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Related Documents

Configuring_Docker_Containers.docx

Description

This lab focuses on creating and managing Docker containers and multi-container applications. Participants will learn to distinguish between containerization and virtualization, and gain hands-on experience with Docker commands and Docker Compose for managing applications.

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