Docker Tutorial
  • Intermediate
  • 6 Lessons
  • 2 hrs of Learning
Watch Tutorials

Tutorial Highlights

Docker’s popularity has increased rapidly over the past years, and it has evolved traditional software development. Docker’s containers allow for the immense economy of scale and have made development scalable, while at the same time keeping the process user-friendly. Our Docker tutorial will help you understand Docker containers, and its benefits, and will also help learn the ways to build docker environment and docker commands. So start learning now to know everything about docker - from its advantages to how it is different from other virtual machines, know how to install it and master several docker technologies.

Skills Covered

  • Docker Container
  • Docker Swarm
  • Docker Compose

Topics Covered

The topics covered in this Docker Learning tutorial are:

  • What is Docker?
  • Docker Installation
  • Docker Container
  • Docker Compose
  • Docker Swarm
  • Docker Interview Questions

Why Learn Docker?

Docker is an advanced OS virtualization software platform that makes it easier to create, deploy, and run applications in a Docker container. The Docker container is a very lightweight package that allows the developer to package up an application and deploy it as one with the help of inbuilt libraries and other dependencies. Docker helps in the simplification and acceleration of workflow. It allows the developers to choose the project-specific deployment environment for each project with a different set of tools and application stacks.

It is simple to use, time-saving, and can easily be integrated into an existing environment. Thus, it provides flexibility and portability to run an application in various locations, whether on-premises or in a public cloud or a private cloud. Docker provides a smarter solution for application creation and deployment. Docker tutorial helps in getting a detailed understanding of the working of Docker and its components.

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Applications Of Docker

Docker is an excellent tool that is designed for developers and system administrators. It can be used in multiple stages of the DevOps cycle and for the rapid deployment of applications. It allows the developers to build an application and package an application with all its dependencies into a Docker run container that can run in any environment. 

Docker allows us to develop an application and its supporting components efficiently using the containers. These containers are lightweight and can run directly within the host machine's kernel. Thus, it allows running more containers on a single hardware. 

It provides a loosely isolated environment that is secure enough to run multiple containers simultaneously on a particular host. Docker tutorial helps in understanding different uses of Docker and making the most out of it. Below mentioned are some application and use cases of Docker:

1. Standardized Environments

Docker allows the developers to work in a standardized environment that helps in streamlining the development lifecycle and minimizes the inconsistency between different environments. It is an excellent tool for continuous integration and continuous delivery workflows that makes the development environment repeatable. Thus, it makes sure that every team member works in the same environment and is aware of the development and changes at every stage.

In this Docker tutorial, you will understand how it helps in sharing the work with other team members easily using the Docker containers. It allows you to push the application into a test environment to conduct automated or manual tests efficiently.

2. Disaster Recovery

Any unforeseen condition or situation can halt the software development lifecycle and affect the business organization significantly. But, with Docker, it can be mitigated. Docker allows the functionality to easily replicate the file or Docker image to new hardware and retrieve it later in case of any issues. In case of rollback of any particular feature or version, Docker can be useful to revert to the last version of the Docker image quickly.

It allows deploying the software without worrying about accidental events. It can be helpful in any hardware failure or configuration problem event wherein it becomes important to resume the workflow quickly. Docker tutorials provide an in-depth understanding of backup functionality and disaster recovery.

3. Faster And Consistent Delivery Of Applications

Docker allows developing, testing, and deploying applications faster. A software development life cycle is long, as it includes testing, making necessary changes, finding bugs, and deploying it to see the final results. Docker allows the developers to find bugs in the initial stages of development so that they can be fixed in the development environment and can be redeployed for testing and validation. Thus, it makes the deployment easier and quicker by merely pushing the updated software into the production environment. In this docker tutorial, you will learn all about its portability and how it allows dynamic management of the workload and create a portable workload that can run on a mixture of environments easily.

4. Code Management

Docker provides a highly portable environment that can easily run multiple Docker containers in a single environment. Docker maintains a balance between the testing environment and the production environment with the help of code management. It provides a consistent environment for code development and deployment. 

It further helps in simplifying DevOps by standardizing the configuration interface and making it accessible to all the team members. Docker containers have made the development more scalable and user-friendly. Thus, it ensures that the interface is standardized for all team members. Docker tutorial helps in creating an efficient code of pipeline management.

Who Should Learn Docker?

Docker is an advanced tool that makes the development, distribution, and deployment of applications faster and smoother. A beginner with a good grip on the Linux operating system can start with Docker. 

However, intermediate and advanced level requires an in-depth understanding of different Linux platforms. It must-have sound experience with cloud-based platforms like Amazon EC2, Microsoft Azure, Rackspace, and many more. 

Docker tutorial is ideal for professionals like Software Developers, Software engineers, Technical leads, System administrators, and candidates looking to make a future in DevOps. 

Prerequisites To Get The Best Out Of Docker

Docker has evolved the traditional software development and has made development more scalable. To take full advantage of Docker, one must have a solid knowledge of Linux, including hands-on experience. It is also required to have a sound knowledge of different core Docker technologies such as Docker Hub, Docker Compose, Docker Swarm, Dockerfile, Docker Containers, and Docker Engine. To excel in Docker, it is important to have a basic knowledge of containerization tools and DevOps tools such as Git, Jenkins, Cucumber, and Ansible. 

Docker tutorials have significantly improved the developer's productivity and operational efficiencies while enabling application agility. 

Enroll for the Docker Certified Associate Training Course to learn the core Docker technologies like the Docker Containers, Docker Compose, and more.

Docker Tutorial: Table Of Contents

1. What is Docker: Advantages And Components

Docker has changed how software development happens. It has made development faster and scalable while maintaining the economies of scale. It is an advanced platform that allows IT organizations to create, test, and deploy the applications easily in Docker containers with all the inbuilt dependencies. Docker can be used in multiple stages of the DevOps cycle, but it provides a significant advantage in the deployment stage. It is more advanced than Virtual Machines and provides added functionalities that make it ideal for developers. 

While the virtual environment has a hypervisor layer, Docker has a Docker engine layer that makes memory usage very low and increases operational efficiencies. A Docker works via Docker engine that consists of two key elements: a server and a client. The server communicates the information and instructions to the client. 

However, there are different components of Docker that make the Docker work seamless. It includes Docker client and server, Docker image, Docker registry, and Docker container. Docker tutorial will help you in understanding these components and make the most out of it. 

2. How To Install Docker On Ubuntu: A Step-by-Step Guide  

Docker is a modern platform that allows automating the deployment of applications in lightweight containers. It enables applications to work efficiently in different environments. 

Docker enables high productivity and makes it easier to configure and manage the applications. It can run on multiple Linux platforms like Ubuntu, Arch Linux, RHEL, and openSUSE. For installing the Docker on Ubuntu follow the below-mentioned steps: 

  1. Open the terminal on Ubuntu and remove any Docker files that are running in the system using the command ($ sudo apt-get remove docker docker-engine docker.io).
  2. After entering the command, you will be prompted to enter the root password. Enter the password and press enter.
  3. Check if the system is up-to-date using the command ($ sudo apt-get update).
  4. Install Docker using the command ($ sudo apt install docker.io).
  5. You will be prompted to choose between "y/n: choose "y."
  6. Install all the dependency packages using the command ($ sudo snap install docker).
  7. Before testing Docker, check the version installed using the command ($ docker --version).
  8. Pull an image from the Docker hub using the command ($ sudo Docker run hello-world).
  9. Check if the docker image has been pulled and is present in your system using the command ($ sudo docker images).
  10. To display all the containers pulled, use the command ($ sudo docker ps -a).
  11. To check for containers in a running state, use the command ($ sudo docker ps).
  12. If you have done all the mentioned steps, then you've successfully installed Docker on Ubuntu.

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3. What is Docker Container: Benefits Of Docker Container

In the third lesson of the Docker tutorial, you will get to know all about Docker Container. Docker container is the most popular form of container technology that allows us to package an application in containers and make it portable for any system running Linux OS or Windows OS. Docker container is a standard unit of software that contains all the codes and dependencies of an application to make it run fast and reliably from one computing environment to another. 

It contains all the essential things required to run an application like code, runtime, system tools, system libraries, and settings. In contrast to Virtual Machines, Docker containers take less space, handle more applications at once, and are flexible and tenable. 

4. What is Docker Compose: Benefits And Basic Commands

Docker is an advanced container tool that is widely used by the developers and operation teams to create and automate deploying applications in lightweight containers. Docker-compose is a core Docker technology that allows running multiple containers as a single service. Docker Compose files can be easily written in the YAML scripting language. It will enable the users to activate all the containers using a single command.

Due to YAML scripts, it provides easy and quick configuration options. It enables single-host deployment that allows running everything on a single piece of hardware. Docker tutorials provide in-depth knowledge of the working of Docker compose.

5. Top Docker Interview Questions And Answers For 2020

In this lesson of the Docker Tutorial, you will get to know the most frequently asked and some of the most critical Docker interview questions and answers

Start Learning the Docker Tutorial Now

Docker is an advanced software platform that allows building portable software containers that simplify application development and deployment. Docker simplifies modern software development with the help of containers that isolate the application's execution environment from one another and use fewer resources than conventional VMs. It significantly boosts performance and reduces the size of the application. 

Docker tutorials are designed for developers, system administrators, and DevOps teams. It allows testing the application and making necessary changes so that everything works fine in the production environment without affecting the existing systems. It often gets mixed up with VMs, but it is more advanced than VMs and provides added functionality. Docker components such as Docker client and server, Docker image, Docker registry, and Docker container makes it more sophisticated and intelligent.

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Simplilearn is one of the world’s leading providers of online training for Digital Marketing, Cloud Computing, Project Management, Data Science, IT, Software Development, and many other emerging technologies.

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