Learn Docker

What is Docker

What is Docker?

Docker is an open-source centralized platform designed to create, deploy, and run applications. Docker uses container on the host's operating system to run applications. It allows applications to use the same Linux kernel as a system on the host computer, rather than creating a whole virtual operating system. Containers ensure that our application works in any environment like development, test, or production.

 

Docker includes components such as Docker client, Docker server, Docker machine, Docker hub, Docker composes, etc.

 

Let's understand the Docker containers and virtual machine.

Docker Containers

Docker containers are the lightweight alternatives of the virtual machine. It allows developers to package up the application with all its libraries and dependencies, and ship it as a single package. The advantage of using a docker container is that you don't need to allocate any RAM and disk space for the applications. It automatically generates storage and space according to the application requirement.

 

Virtual Machine

A virtual machine is a software that allows us to install and use other operating systems (Windows, Linux, and Debian) simultaneously on our machine. The operating system in which virtual machine runs are called virtualized operating systems. These virtualized operating systems can run programs and preforms tasks that we perform in a real operating system.

 

Containers Vs. Virtual Machine

Containers

Virtual Machine

Integration in a container is faster and cheap.

Integration in virtual is slow and costly.

No wastage of memory.

Wastage of memory.

It uses the same kernel, but different distribution.

It uses multiple independent operating systems.