This is generally done by using a special configuration file called Dockerfile. For this reason, containers are much more lightweight than traditional virtual machines, while still providing the benefits of isolation and portability.īut how can we create a new Docker image? With Docker containers, you don't have the overhead of having to include an entire operating system as part of your image, but only the basic dependencies needed to run some programs.įrom the image above you can see that the Container Engine runs on top of the operative system and that you don't have to include a guest operative system into your container images. Docker containers are another way to package (or "containerise") software and run it across different environments.īut there's a fundamental difference with virtual machines. In many ways, Docker containers, are very similar to virtual machines. It's a consistent medium to develop and deploy software. You can even run it in your own desktop machine or share it with your own colleagues. You can create an image and run it in different environments. Virtual machines are great because they allow you to run some useful software in an isolated way and they are easy to distribute. To explain what a Docker container is, let's just start by imagining a virtual machine or a virtual server provisioned to run a specific program. What is a Docker container in simple terms? While doing that we will also learn what Docker is and why you should consider it, especially if you are developing multiple projects or if you are working in a team. We will discuss the main benefits of this approach and explore some interesting examples. In this article, we are going to learn how to use Docker and Docker Compose for Node.js development. Published by Giuseppe Morelli on Wed, 18:00:00 GMT
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