Containers? So What? Docker 101 Explained - Computer Stuff They Didn't Teach You #8

[@raghavpatne6578]

Scott you are the Bob Ross of Programming. :-)

[@TheDandonian]

I subscribed to this guy because of your comment.

[@alpomb4628]

I thought the same thing!

[@lalibi]

I opened up comments to write the exact same thing...

[@mariopendragon5373]

when he shrunk down the size of the Docker Deamon box.

[@HK-sw3vi]

Rob Boss

[@joross8]

Hey Scott, as a professional with over a decade of experience in system engineering, networks, development, etc, just wanted to let you know that I enjoy these videos. You do a great job of presenting the content and talking through it. I always enjoy refining the basics.

[@snk-js]

I loved all your videos, and I got a feedback for you: on 20:58 try shrink your record ( or move screen more to left) when you are making explanations in the bottom right corner of the screen. Keep your excellent open source content, the world thanks you

[@shanselman]

Good feedback! Thanks!

[@omairkhan279]

Thanks a lot Scott for explaining stuff in an easy to understand vocabulary and pace. A topic on Kubernetes would be great.

[@hackerculture7391]

Loving this series and the very friendly and insightful way these tools and ideas are presented. Love Hanselminutes as well! Amazing podcast.

[@user-jt7wb3zc1m]

Thanks for recommendations, i don`t hear this podcast before 👍

[@angmathew4377]

My heart out. In our cs studies , We were told not to spoon feed. And the results were we never able to digest lots of cs stuff. But you are the man, who is giving us lots of detail in a magical way. Thanks to you and if there is any teacher around he needs to learn from this of how to help students.The ones who need to know at first place.

[@lemurza5236]

This is hands down the greatest intro to docker on the internet. Thank you.

[@The8merp]

I love that this entire video had no fluff and got straight to the point and showed how things work both on the code level and overall architecture level. The best explanation of why docker and what is docker I have seen on KZbin.

[@michaelnurse9089]

Love your style of explaining 'stuff'. You know exactly when to use jargon and when to use generics like 'stuff'.

[@stephenrogers5458]

Hi Scott, Stephen Rogers here from the old STEP days. I'm into hands-on webdev these days, building a real-world data collection/analytics product, using Vuejs, Express, and Nodejs. A colleague and I are building on Docker, for the benefits you discuss in this video. Nice job BTW. As for what we'd love to see, a video showing how you might build a product-quality workflow from dev desktop to deployment (we're targeting Digital Ocean at this point), using Docker. All the Best

[@RohitYadav24]

This is the most easiest video I came across which explains Containers so well. Thank you for making this entire series! :)

[@j0zeft]

started watching at home, and was continuing at the office... I thought I was alone so played on speakers, a colleague (not an IT person) from couple of rooms away came by to say good morning when she heard a sound and got interested, now she's watching the video from its beginning in her office :D

[@Muhammad-sx7wr]

She also now knows what a tattletale you are. Lol.

[@conventionalfusion6416]

This also works kzbin.info/www/bejne/mGWadqpubrFkfJI

[@natepepin09]

This is the first video about Docker that has made sense to me. I like your method of explaining out concepts without using a lot of buzzwords.

[@zoran123456]

Finally someone who can give me brief and simple esplanation about what the heck is this docker all about. Thank you to heaven and back. Why are you so smart?! 🤪

[@lootpigeon]

Thanks Scott, been lurking and watching your talks and tutorials for a while and I have to say the way you explain things and the content is amazing. Keep up the great work!

[@Stephen-Jones]

Having had a few sessions to train me about containers I have to say this one has helped cement my understanding the most. Super massive thanks for this. 👍

[@samuelschwager]

A kubernetes video would be great!

[@shanselman]

Done!

[@samuelschwager]

@@shanselman Thanks!

[@andreykolybelnikov1084]

Once again, sir, thank you very much. You made my day, weekend, and everything. Your style is so approachable and the explanations are very clear.

[@paullesik]

Great video Scott! One thing I find a little bit confusing is around 14:30 timestamp...when you talk about the container being gone forever when it's stopped...that's not exactly true. docker run = docker create + docker start, so yes by using 'run' we always create a brand new container, but the old one still exists...with all the changes in there...and we can start it with the container ID and attach to it if we wanted to. Cheers

[@shanselman]

Good point. Stopped != Removed.

[@pandyamehul]

Great overview with very simplified explanation about basic stuff Docker - it's great video showcasing how - Docker, WSL2, Linux, VS-Code etc. tools and technology can be used to build app in very short time. Great stuff :)

[@MVerbaas]

Clear and good help on how to start with docker/containers!

[@mortengabrielottersen6813]

I like how calm you are when presenting stuff. I'm hope to get there some day.

[@ManthaarJanyaro]

Love you Scot for teaching us the stuff that isn't taught in schools.

[@georget10i]

A slight correction at 14:35. When you issue the "run" command, it creates a new container, hence why the state is not preserved and files are deleted. Because it's a brand new container. If after stopping a container (by issuing `docker stop {container-name}` command), you use `docker start {container-name}` command, whatever the files you created there before, will still be there, so the state will be preserved. If containers had been stateless and wiped everything when stopped, it would not have been possible to have dockerized databases.

[@isakgranqvist5685]

Love your calm teaching style. Really knowledgeable and enjoying to watch. 10/10

[@MaxQuagliotto]

Thanks Scott! I have been very apprehensive about using containers for many years -- but this video is exactly what I needed.

[@paulogodinho3275]

This is the best introduction to docker I have ever seen. I was always scared out of trying it by far too techy videos, thank you for making this one using terms that people from outside can actually understand.

[@marzzuri]

I am enjoying the series.i special learned GIT by doing the hands-on along with your videos. Thank you for the time invested into these videos.

[@theimp67]

Great video Scott, I've been hearing about Docker, and Kubernetes, etc. and this video is great at explaining what it us and WHY the industry is using this technology. Great springboard to learning it in more detail. Thank you.

[@shanselman]

Just did a Kubernetes one!

[@theimp67]

@@shanselman I've seen that, it's next on the list. Thank you.

[@sbitaxi]

Scott, I've played a little with Docker, but only using things built by someone else. I feel like I have a starting point to build something of my own. Thank you for this vid and series!

[@88spaces]

Scott, I've admired your work for a while. You do an outstanding job. I'm glad you're doing videos now. They're really helpful, especially this one. Thank you.

[@kennethbrannigan4651]

Great video Scott!! You are hitting all the items I am interested in Git and now Docker!

[@jayhu6075]

You make every topic understandable in a unique way. Many thanks.

[@BookOfMorman]

You are the Bob Ross of computer tutorials! Love the videos! Keep up the great work!

[@khaledsaidi7709]

Keep it coming scott I learnt from this series, what 5 years of Software Engineering School couldn't teach. You are a tech Ninja 🐱‍👤🍂🔥

[@xphacter]

What a great video! Thanks for making everything feel so easy to approach and not so daunting. Great style!

[@TomRay74]

Scott, you are a very good educator. Thank you for this easy to understand take on Docker and containers. I appreciate your work. Thank you!

[@sxdev]

This was great , already worked with docker but still a very nice explanation and just relaxing to listen to you and learn stuff ..

[@cro-guy]

Awesome video! Had a chance to use Docker a couple of times, but never really understood it on the level I wanted. You cleared it up nicely!

[@chaouanabil3087]

Nice series scott, you have a gift! you can simplify and explain concepts well! and make them looks easy. it is what a newbie wants from "get started" videos.

[@daStitches]

This was VERY helpful, I've watch plenty of videos about docker and even though this was an overview this really helped with some of the basic concepts that I think other skip because they assume you know what they are talking about. Please keep up with these videos!

[@alberthoekstra]

Great video Scott. Fun to see a production Dockerfile in a video like this.

[@bepd]

So glad I found these videos. I'm a new Jr. Dev and you've helped me understand so many things that have mystified me in my job.

[@MarcDurdin]

Thanks Scott. I am not usually a fan of learning by video so it was a pleasant surprise to watch this and find it really helpful. (One small request: can you put errata as commented on into the notes for the video?)

[@tomschi9485]

When I save links, I classify them with the prefix !1 to !9 !1 means: Useful up to !9 means: great / very important I classified your 'fill the gap' video with !9^9. I don't think it is possible to explain the most important Docker / Container basics so simple and clear in 30 minutes. Thanks a lot for sharing your great work!

[@TheAfreitag]

Great Job Scott. I think you have a unique was of getting information across its really palatable and easy to watch!

[@georgepal1886]

Really good video. Of course the next step to that is to talk about Kubernetes ;-)

[@ArielErlijman]

I finally understood all that container´s magic!! It´s so awesome to learn from the experts... thx Scott!

[@ashishkhatiwada1880]

Scott timeline 14:51 . You are not stopping the container, instead you are starting a new container . Try see running "docker ps" .

[@shanselman]

Yes I needed to -rm or stop. Thanks!

[@arnabganguly]

I cannot describe in words how grateful I am... Thank you

[@amirbarghi]

These are indeed important skills that are not taught in school. Love the series Scott. Thank you!

[@webosm6494]

Do you run a database like SQL Server also in a container? And what is the best way to store its data.

[@jeffb5798]

Hi Scott, this series is great! Can't wait to see what else you talk about. As for Docker, it would be great to see additional videos on other Docker topics. For example, having not used Docker before and now having watched your video, I learned that the Docker containers don't save anything. So I'm curious, if I were running a SQL database (like MySQL, or MSSQL) in a Docker container, how would the changes to the data (in the database, which is running in the Docker container) be stored, so that the data is persisted and running the Docker container the next has the data? Or, say I wrote a web site that allowed users to upload, view, and share images, and the images were stored in the local file system, how would that work with Docker? Or is the concept that, one builds their web site in a Docker container, but the data (DB, files, log files, etc...) are stored on an external server or external service?

[@yareps]

I'd hit the thumbs-up a hundred times if they counted. You're the Mr. Rogers of computer knowledge. (Know anything about writing Visual Studio extensions, like custom editor commands like you used to be able to do with VBA?)

[@warperone]

nice clear explanation - you have a great teaching style

[@EmadMokhtar]

Super useful and I pass it to my friends as it is simple and to the point. Well done Scott.

[@liquidpebbles]

Really insightful stuff! Dockerfiles look like they can be really complicated. Thanks Scott

[@babloor1]

Great video! Explained very nicely.. one of the best explanation for docker I've seen. Please go ahead and explain some advanced concepts like docker-compose and how to use docker to build your own development environment. Also, Kubernetes plan sounds really good, looking forward to it.

[@lefterismic3978]

Great examples easy to follow and understand the true power and the actual meaning of docker with containers!

[@AndyHake]

This blew me away. I have used Docker containers as a consumer, but never realised you could develop with them this way.

[@richardarts520]

Great video! Good entry point to start exploring Docker.

[@lderluis]

Thank you very much. This is more than enough to get me started with docker and understand how I can start leveraging this great technology.

[@FrequencyModulator]

I'm learning more from your videos than from any other source.

[@natz1337]

Awesome video: both educational and asmr-friendly. Thank you!

[@johnarmitagehere]

+1 for covering kubernetes next. I think that's a great idea. Also great job explaining containers in a super simple way.

[@christophheins4398]

You Scott, are such a great guy. You have an undeniable talent for breaking down and explaining things in a very approachable way. Thank you so much for putting all the effort necessary into making these videos and please keep doing it. I am even thinking about making some of your videos mandatory views for new hires in our company ;)

[@rbryan827]

Hey Scott, how do you add and connect your Database in the container?

[@Rodhern]

Hi. At this point 11:40 I expected the output to be the one we were shown ten minutes earlier 01:40. However that is not the case. Is it just a matter of artistic license or did I misunderstand the point made?

[@shanselman]

Ah that’s good feedback. I was trying to make it clear that one was in Linux and one was inside Docker, so the one I copied into the container has the string change. I realize now that was more clever than informative. Thanks!

[@ericserafim7954]

As always, great talking. Thanks Scott for your time!

[@willembont4790]

Excellent presentation. Thanks.

[@RobertoSolanoM]

very good video, explained as simple as it can get.

[@Tea-Spin]

What kind of "terminal" that you're using in the video? It kinda nice to be able to open different terminal in one window (different tabs)

[@BMosbat]

Windows Terminal. Scott has a very informative video about it, check it out

[@QckSGaming]

Oh wow, that explains a LOT! One question though: What about when that database containing that one crucial library is down, are you out of luck then and just have to pray for the provider to come back online to serve you the required packages? What about (docker image/layer) caches? Do they take much space?

[@shanselman]

They do take up some space but not lots. For production if you are worried about a layer disappearing you would host your own container registry and cache all layers and containers, as a backup.

[@l_combo]

Amazing as always Scott, looking forward to Kubernetes?

[@sunilanthony17]

I miss VS Live, you are always amazing at those events. You are my idol. Thanks for always inspiring me to elevate myself.

[@blevenzon]

Best explanation I’ve seen. Thank you Scott. One question, your podcast app that you dockerized, what web server did it run on?

[@x__dos]

Thanks Scott, pls tell about how DBs can be used in containers, as long as they dont persist data between reboots

[@martijnvaandering8204]

Thats where volumes come in place 😀👍

[@b87b84]

You should not persist data inside an image when running on container.

[@MicheleFerracin]

With volumes 😊

[@MichealColhoun]

I have been avoiding docker - Thank you. Now was a good time to watch this video

[@Matar86]

Very neat walk through. It'd be nice if you could use same "layers" concept to explain the more about how security stuff like http/ssl/tls work & related. Thank you Scott.. Great work

[@alimahdi6379]

Hi Scott. Great stuff. One thing they did not teach me at school is public vs private ip addresses and ports. I finish my server code and the engineers start talking about nating and interfaces. Greek to me. In this video you had two ports 81 and 80, for example. If you can tell us more about that it would be much appreciated.

[@vladchendev6195]

Thanks Scott for such a lovely video. As always, your hard work is changing world and is greatly appreciated! I am wondering if you have put any thoughts on making video on API thing? As much as i read about as much as even worked with it I'm not fundamentally grasping all the "coolness" of using APIs vs JDBS, ODBC and ADO.NET drivers connections.

[@droopydave11]

Great work, Scott. Looking forward to the Kubernetes lesson. You have a new subscriber, and found this very informative! Thanks again!

[@jacobavilacamacho7644]

Great description about containers. Thank you

[@davidcarter8272]

Very useful Scott. We have been using vids these for weekly learning with our team.

[@wmd5645]

The basics. Cant beat the basics. Gimme all the basics. Thanks Scott

[@JonBurger]

A follow up examining the uses of docker-compose would be extremely interesting too :)

[@strandloper]

Thanks Scott. Great explanation as always, but I have a question. I was following along on my own machine and after running nginx with "docker run --rm --name docker-nginx -p 81:80 nginx" I reached the point at 21:54 where I can switch to my browser and browse localhost:81 and it works. But where you did Ctrl-C and then could see the running Docker nginx process, I don't see any process and localhost:81 no longer works. It seems that your nginx container continued running in the background but mine didn't. I don't know why; can you explain why this might be? I'm pretty sure I followed your steps correctly up to that point.

[@shanselman]

I believe my browser cached that page because when I refreshed again in the video it stopped working.

[@strandloper]

@@shanselman Not just that though. After pressing Ctrl-C you were able to issue "docker ps" and see the running Nginx container, but for me pressing Ctrl-C killed it and "docker ps" showed no running container process.

[@Nikhildeepsinghmahi]

Can you please make Docker 101 so that even the person who is not familiar with them can get to know about it. Even though I work in IT, I am not sure what it is. Thanks for the videos. Amazing content, lots of things to learn from you. Looking forward for the video.

[@tahak7411]

I love this series, please keep making these.

[@ashishkhatiwada1880]

good sound quality, good video and lighting. good content.

[@bschaatsbergen]

Amazing scott, thanks for the 101!

[@viniciusvbf22]

Hey @Scott Hanselman, I'm recommending all your videos to my dev team, no matter how basic they are. People really get going these days not knowing the basics. In fact, I had in my to-do list to make videos explaining exactly what you explained in your 2 first videos of this series, so thank you so much for that! :) Subjects that are also on my to-do list to make videos about: Base64 and Endianness. Feel free to beat me on those 2 also :)

[@lwinmoehein2894]

Hi Scott,you are a real legend,thanks so much for all your works

[@ggibellato]

Best explanation about Docker that I saw

[@annieorben]

Kubernetes would be a great next topic. Thanks for the overview explanation, its in-depth enough to try stuff out, but not overly in-depth!

[@JingerVideo]

Great talk, educative as well as fun, you rock!

[@petermcclymont7347]

Thanks Scott. Really useful. Containers are a bit difficult to understand initially. But it makes sense now.

[@Voldermortish]

I really enjoyed the presentation and the way the concept was visually explained using Draw.io

[@mattjoslin7087]

Very nice content, put across in a easy, friendly way. Good for amateurs and professionals alike.

[@Noceo]

"Rocket surgery"? That sounds really dangerous (but also kinda cool).