MicroNugget: What is Docker and How Does it Work? | CBT Nuggets

CBT Nuggets trainer Garth Schulte walks through everything you need to know about Docker, an open-source container-based technology that separates applications from their underlying operating system. Find out what Docker is and how it is used in DevOps with this MicroNugget video.

The concept of containers themselves aren't completely novel: Linux containers have been around for a while.

With those, a developer can package up an application and all its parts. That includes the stack it runs on and the dependencies associated with it.

The package becomes an isolated environment, containing everything the app needs to run. What that means is that the underlying system – the host – is abstracted from the application itself.

This is important because it circumvents dependency nightmares. If you develop an application on one machine and deploy it to a QA machine, if there are any differences in their dependencies, your application might not function in that environment, despite being a perfectly workable app.

Watch to understand exactly why so many huge companies and enterprises depend on containerized applications every day and Docker specifically. See how Docker provides continuous integration, continuous delivery, portability, scalability, density, and more.

0:25: What is containerization?
0:55: Dependency nightmares
1:25: Why containers are recently so popular: Docker
1:55: Docker defined
2:40: Docker's benefits
3:55: Why to use Docker
5:15: Core components of Docker
6:00: Docker workflow components
8:05: A visual example of a Docker instance
10:25: Overview

Start learning with CBT Nuggets:

[evilstudios]

Thank you!
I wasted the last 30mins to watch "What is Docker" explanations on YouTube and all I needed was 1:55-2:05 of this video.

[michealmorrow]

For the first time, I get the difference. It is a big one, more than is being explained by most people. It is the lack of a second level OS (environment) that keeps it lightweight. It "virtualizes the OS". Makes so much sense. Thanks!!! I have been wondering, for a while, what the big difference was. Now I know!

[MrDaoJones]

I've been watching CBT Nuggets for years now. Without fail in everything I've had to learn they have always provided the simplest explanation in the most concise way possible. The container explanation is no different. Thanks CBT.

[kcmagk]

This is the I love CBT nugget videos! Simple and smart! way to go!

[felixmintah]

searched on the web for almost a month to understand docker clearly and this is by far the best of the best tutorials on docker. Man, I "docker" you!!

[Sethorion]

A very informative video that is quick at covering the principles without drowning it in unnecessary information.

[iYousif_]

I needed to understand this for a long time!
Thanks a lot!

[suhas]

I was searching for the best explanation of docker and here it is!!...
Thanks a lot!

[shareforeverything]

Your Demo is excellent. Crystal clear explanation. This is what exactly I was looking for. Thank you so much

[itpugil]

best explanation of docker on youtube! :D

[SamAndrew]

Wow, this is some next-level stuff! No wonder it's gaining ground so quickly.

[jackjillhill]

Thanks for a good intro, short, precise and very informative.

[Richard_GIS]

Thx for the easy understanding of what is docker  -searched long for this to get the idea :-)

[EmadSaeed]

saw many videos about docker. but really this one is so special
thank you dude for the great video

[ToTCaMbIu]

The best explanations out there. Even mentions the kubernetes at the end of it.

[mohanamarnath]

The information is very crisp and you can just get started off! Thanks.

[AishwaryaPradhan]

Wow, This was great. Love you CBT Nuggets.

[ektapatel]

one of the easiest and best explanation of docker thank you :)

[MyChannel]

Excellent video.  Explained the concepts much better than many others on these topics.  Thanks much !!

[MrAbeRoad]

Great video, it explains all I wanted to know as an introduction. Far clearer now :-) Thanks