Technically speaking, Single commands can get long, really long in Docker. Some of them have dependencies(Rice, Salad, etc). That is "sorta" like docker-compose, where several of those "containers" come together and make a complete application. Or need a few items from the same recipe book. To make "A meal" you need several of those "items", you prepared using a few recipe books. Until now we only made "one item" i.e chicken sauce for the full meal, the meal consists of some naans as well. So, as a solution to this problem, Docker Compose permits us to use a YAML file to define multi-container apps. While our Docker application includes more than one container, at that time building, running, as well as connecting the containers from separate Dockerfiles is definitely time-consuming. Containers are supposed to be "stateless" just like your vessel. Once you are done cooking/making that item, you can take that vessel (container) and take it anywhere. That's truly what a "docker container" is. Once you add everything up, to make "that one item", you have it inside "a container". Following the recipe book, you can make "one item(the sauce)" of the total meal in a vessel. It has an ingredient list and portion size. You invite me over for a dinner and plan to make a meal, preferably Butter Chicken and Naan. Let's take a step back and start from Dockerfile. The container is like a box that holds your application and all its dependencies together in an isolated environment. (Any Linux Distro, WSL2, Google Cloud Shell)ĭocker makes developing applications much easier to manage and the way it does that is through what's known as containers. We'll go through a quick overview of Docker and how it works.Ī Linux Machine. You'll need a very tiny bit of Docker knowledge but if you don't, that's ok. If you’d like to follow along step-by-step, in this tutorial, ensure you have the following: In this step-by-step Docker Compose tutorial, you’re going to learn how to create simple containers, map ports with Docker Compose and deploy them.Īre you ready? Let’s dig in! Prerequisites A Docker tool that allows us to containerize an entire application with just one file saving us from the tedious task of running every Docker container by hand.
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