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Week 3: Getting hands dirty

Goals of the week
​

 - Understand the basics of Containerization  
 - Learn Docker and Containerization
 - Deep diving Docker

Docker​

Docker is a popular open-source containerization platform that is often used in DevOps to package and deploy applications and services. Containers provide a lightweight and portable way to run applications, making it easy to deploy and manage them in different environments. Remember that containerization is an essential aspect of modern software development and deployment, so it's important to continue learning and experimenting with it as you gain.

Course Name: Docker Certified Associate.
Course expectation: Build Docker Concepts.
Estimated time to complete this course: 4 days.

  • Install Docker: The first step is to install Docker on your system. You can download the appropriate version for your operating system from the Docker website.
  • Learn: the basics of Docker: Once you have Docker installed, you can start learning the basics of Docker. You can learn how to use the docker command to run and manage containers. You should also learn how to use the docker images and docker container commands to manage images and containers.
  • Learn: How to use Dockerfiles: Dockerfiles are used to build and configure Docker images. Learn how to use Dockerfiles to define the environment and dependencies of your application.
  • Learn: How to use Docker Compose: Docker Compose is a tool that is used to define and run multi-container applications. Learn how to use Docker Compose to define the services that make up your application, and how to start and stop them.
  • Learn: How to use Docker in a production environment: Learn how to use Docker in a production environment, including how to manage and scale containers, and how to troubleshoot and debug issues.
  • Learn: How to use Docker in a continuous integration/continuous delivery pipeline: Learn how to use Docker in a continuous integration/continuous delivery pipeline, including how to build and deploy Docker images.
  • Learn: How to create a new Docker Compose file and define the services that make up your application.
  • Learn: How to use Docker with other DevOps tools: Learn how to use Docker with other DevOps tools such as Ansible, Jenkins, and Kubernetes.
  • Task: Create a Docker Compose file to define and run multiple containers together. The compose file should include multiple services, such as a web server, a database, or a load balancer.
  • Task: Use Docker volumes to persist data outside of a container. This can be useful for storing data that needs to be retained even if the container is deleted or recreated.
  • Task: Create a custom network in Docker and connect multiple containers together using it. This can be useful for creating a more complex application architecture, such as a microservices-based application.
  • Task: Create a new Docker Compose file for a web app, Start and stop services: use the docker-compose up and docker-compose down commands to start and stop the services defined in your Docker Compose file, Use environment variables: use environment variables in your Docker Compose file to configure your services.