Intro to Docker [with Java Examples]

[@tjohnsonabraham]

I never quite understood Docker until I watched this video. Dalia managed to do the impossible in less than 4 minutes. This is top quality content.

[@Keepfaith101]

fact

[@alexpadula7859]

Years I avoided Docker, now I'm obsessed, thank you.

[@levinie5081]

even better than docker official tutorial. thank you

[@JetBrainsTV]

Wow, thanks!

[@hyperborean72]

The quality of the video, the design of the graphics, crystal clear explanation right to the point, and even soft background music make this video outstanding. Thank you

[@JetBrainsTV]

Wow, thanks!

[@MariosMartiopoulos]

I never watch videos in English, but I can listen to Dalia for hours. Please give us more videos with her.

[@skverskk]

Positively one of the best introductory tutorials on Docker out there on KZbin.

[@sumitpatnaik7057]

Jet brains should start education channel for such great content

[@JetBrainsTV]

Thank you! Which other types of content would you envision on such a channel?

[@sumitpatnaik7057]

@@JetBrainsTV project based content would be great

[@superstargazer923]

@@JetBrainsTV I would love having a app development video with jetbrain editor

[@moofymoo]

I'm thinking more of replacing existing education system with JetBrains one. They can start with my country's education system anytime, because selling out to Microsoft didn't work so well.

[@njgarg]

@@JetBrainsTV A project based on Spring Boot, Kafka, Actuators, Spring Data JPA, REST APIs.

[@samofohachinweuba1641]

the best docker with java video i have seen. i almost gave up on using docker with java till i watched this video. Well explained . Thank u

[@superstargazer923]

Great edu video. I wish jet brains offer a special edu KZbin channel and courses. Just a suggestion

[@azatburkhanov1397]

Best explanation of Docker Intro concepts I've even seen on web

[@manee427]

The bset explanation about docker image creation. Perfect

[@yogeshmujumdar]

Loved the way you speak. Crisp, slow and with full attention. Even a kindergarten student will be able to follow! Thanks!

[@pahan35skype]

Great video and material quality. This kind of format works even better than just a tutorial from Docker. And big thanks for showing us how to use Docker features from IDE. P.S: and it's easy to consume a material at 2x. Thanks to Dalia for the great pronunciation!

[@JetBrainsTV]

Glad you liked it!

[@dimitriosmenounos1009]

Nice presentation. I want to add at 5:50 VMs don't suffer only from having to duplicate an OS but also from having to emulate hardware components to the virtual environment. That makes them both heavy and slow.

[@raphaelreitzig5984]

There's lots of follow-up stuff to ingest before going productive, of course -- but this _is_ a great introduction for the uninitiated! Kudos!

[@raphaelreitzig5984]

@Dalia Abo Sheasha I was more thinking along the lines of how to actually create a good image (not with Dockerfile, IMHO); how to configure the Java application through container interfaces; changed assumptions, e.g. short-running small service vs long-running monolith, and consequences; health checks resp. liveness/readiness probes and good practices for them; delegating cross-cutting concerns, e.g. to service mesh; and so on. In short, there's many things you have to rethink when deploying a container image to, say, a Kubernetes cluster, as opposed to running a WAR in an application server. Just bundling your old application in a Dockerfile is, arguably, not even a good start. :'D That doesn't take away anything from your video, of course: as I said, it is a good, approachable intro into the "why" of containers, which is often lost in more technical contributions about "how".

[@himaniamit]

Amazing way to explain Docker. Thanks for sharing it

[@OmoruyiOmofonmwan]

Jesus thank you so much. This is the best video yet about Docker.

[@codegeek8256]

This is useful as currently, we do not have tutorials that clearly explain Java with Docker. Keep it up. However, we would like Tutorials that are more hands-on from your side than you explaining and the code writing itself on the left. None the less thanks so much.

[@SosetaFurioasaJr]

Dalia, thank you for a great introductory video! It helped me familiarize with Docker technology. Thumbs up!

[@kenduraghav]

Great content for the beginners who wanted to learn docker

[@danmarian3606]

One of the best videos on Docker... Thanks

[@rahul-java-dev]

Very very helpful....Thanks a lot ma'am.

[@Justdoit-zm8nz]

Thank you for clear step by step instruction, save my assignment

[@gunaseelanselvam2374]

Thank you, this video is helpful to start learning docker

[@tradewithtony]

I am seeing this at the right time, this is so far so good very informative and timing is perfect covers all

[@luciorogeriobotelho3032]

Great presentation. Described the important points using a simple and complete example

[@stoychostankov886]

The best explanation. Thank you

[@ПавелСмирнов-й7х]

Amazing video, Dalia! Thank you so much

[@ranjithkumarr5981]

Noble work. Many thanks

[@sureshbhat1891]

Great video and awesome job Dalia!!

[@JetBrainsTV]

Thanks for the visit

[@mariancaikovski8638]

A well-illustrated talk to the point.

[@chessmaster856]

Very good video from Java perspective.

[@santoshsahani4364]

Thank You JetBrains for this!

[@JetBrainsTV]

You bet!

[@GakisStylianos]

Very straightforward. Good job!

[@cagataysen31]

14:55 When we are running the app, we need to install docker plugin first from the Intellij (at least for Community edition).

[@user-cq3pb6es9h]

Thanks a lot. The first sane description of Docker I see.

[@afibrahim00]

Impressive, Dalia!

[@shaktisingh-lu3dm]

Very nice n helpful video for beginners.

[@codeispoetry]

Awesome explanation. Thank you.

[@mostafahashemi9073]

Great explanation 👍 Thank you .

[@ahmedabouemira1713]

Thank you dalia for this great explain! this really was helpful !!

[@KonstantinKuda]

Wow! Finally, everything is clear to me :)

[@kumo860]

This was incredibly helpful! Thank you!

[@VinayakKarigar]

Very informative. Thank you so much 🙏🙏

[@whitefang1987]

Good video. For the building step once you made changes, I thought it was good that you built locally to show the updated files, but think it would have been better if you had gone into detail that you could update the docker file to add a build step for you. So you can make sure the code builds from within the container as well not just it builds on my box, which would help illustrate that someone else could build & run the application.

[@ankur.singhs2111]

extreme quality content. Thanks.

[@raphaelprates1500]

Awesome video! Thank you for sharing your knowledge

[@prajyotkarnik2039]

The best Docker video everrrrr!!!!!!!!!!!!!!!!!!!!! She is just exceptional.

[@yasirchoudhary824]

Very good explanation

[@dinobulja]

Thank you, I like your videos. Very nice explanation.

[@petersoderstrom857]

Great video. I thank you.

[@АлександрСиньков-й5р]

Brilliant tutorial! Thanks a lot!

[@HtopSkills]

Clear explanation

[@mohamedelbagoury4027]

This is an excellent intro

[@josephrabbit]

Perfect tutorial, thanks !!!

[@gopalkarane]

Thank you! It was very informative

[@JetBrainsTV]

You're welcome!

[@aniketshetye9639]

That's really awesome explanation , much appreciated , thanks !!!

[@ayuobmousa6589]

بالعربي عظيم جدا ...داليا العظيمة ⚘👑

[@mwalilitobias9679]

Very Nice. Great content.

[@stuetz]

Really like it. Thank you.

[@raghavanaliassaravananm1546]

A masterpiece !!

[@GunelMammadova93]

The best explanation so far! Thank you! :)

[@huynguyentien4135]

Thanks ! you did amazing job

[@pasmimmo]

Super Clean and helpfull 👍

[@ronaldfungss]

Nicely done. Thanks

[@saadthayab]

very clear thanks a lot.

[@MostafaHany]

Brilliant tutorial

[@hyperborean72]

excellent video. thank you so much

[@JetBrainsTV]

You are welcome!

[@getsunova8894]

Thx. I have a better understanding of docker now.

[@ryansossou646]

i was looking for tutorial like that to start using docker and java , thanks and she got Cardi b voice by the way haha

[@MrValentine710]

At 14:54 it doesn't seem to work for me, when I try to build the image. Is there an updated version?

[@jeick3645]

this video is perfect in everything

[@OMNS777]

Thank you so much for this video!! Very informative !! Just subscribed and became a customer :). Love JetBrains!

[@JetBrainsTV]

Awesome! Thank you!

[@patiencemabasa6927]

Thank you, i understand docker now.

[@JetBrainsTV]

Great!

[@superstargazer923]

Please offer online courses. Your content is sooooo goooood!

[@rayshadow6796]

How do you create docker container that runs a java swing GUI app? Would Be a great video!

[@ArtemidorosEuthymius]

Your example doesn't work if you omit the compilation step of *.java files. How is your project working without this crucial step?

[@Praveen_Chathukutty]

Dalia the wide eyed girl. Superb intro to the Docker.

[@backtoGodhead0]

so cool thank you!

[@akifzaman7280]

I ran into some issues, specially when it comes to running the containers. I believe the following points will help others following this tutorial. If your Main java class is within a package, make sure that within the DockerFile, you include completely qualified java-package + java-class name. I had to do...CMD java com.test.docker Main (as my Main class was within the com.test.docker package). Also, when executing the image, I had to include version numbers. So docker run :

[@maasmans]

I think I have this issue but your explaination isn't clear to me about where to put extended package information.

[@ramabookstroremalang9131]

I love JetBrains so much 💯💯

[@enimal524]

Excellent video, but at the end you should said that we had to stop de Containers, because they run indefinitely

[@reshid.seyidli]

best explanation ever !!!

[@makshrech1263]

please, mention there are different wrappers. Spwnt 2 hours useless until found official doc with sprint example

[@rroy2812]

just excellent.

[@ucheyikenna9769]

this video cleared a lot of stuffed air for me, thank you... trying to run my container after I have built it, I get this [Error: Could not find or load main class EazyBankApplication] I need help on this

[@rabinawal5375]

If anyone gets error following this tutorial Error: Could not find or load main class Main Solution: Change CMD java Main to CMD java com.example.Main Replace com.example according to your package.

[@hectorruiz8957]

Does anyone know how to create a Dockerfile with Maven through IntelliJ?

[@ArtemidorosEuthymius]

7:01 Isn't Docker an OS-level virtualization, i.e. it packages operating systems.

[@СергейВасильев-р3и8е]

Error: Could not find or load main class Main Caused by: java.lang.ClassNotFoundException: Main 😢

[@Mexicanboy07thst1]

Can you do a tutorial on this using Maven

[@michaelwatts8367]

Nice, clear presentation, thanks. Although I think it cruel to put cats and elephants in shipping containers.

[@yannickmussche5068]

what about .. Maven .. spring-boot:build-image?

[@alexandersemigrodskikh8400]

Good!

[@niharr7]

Nice tutorial.You did not explain how to send this my coworkers ?

[@dowlathbashag65]

Hi , facing some issue.Not able to create the image. C:\Docker-Java\Helloworld>docker version Client: Docker Engine - Community Cloud integration: 1.0.12 Version: 20.10.5 API version: 1.41 Go version: go1.13.15 Git commit: 55c4c88 Built: Tue Mar 2 20:14:53 2021 OS/Arch: windows/amd64 Context: default Experimental: true Server: Docker Engine - Community Engine: Version: 20.10.5 API version: 1.41 (minimum version 1.12) Go version: go1.13.15 Git commit: 363e9a8 Built: Tue Mar 2 20:15:47 2021 OS/Arch: linux/amd64 Experimental: false containerd: Version: 1.4.4 GitCommit: 05f951a3781f4f2c1911b05e61c160e9c30eaa8e runc: Version: 1.0.0-rc93 GitCommit: 12644e614e25b05da6fd08a38ffa0cfe1903fdec docker-init: Version: 0.19.0 GitCommit: de40ad0 C:\Docker-Java\Helloworld>docker build -t helloworld:1.0 . [+] Building 30.4s (3/3) FINISHED => [internal] load build definition from Dockerfile 0.2s => => transferring dockerfile: 150B 0.0s => [internal] load .dockerignore 0.1s => => transferring context: 2B 0.0s => ERROR [internal] load metadata for docker.io/library/openjdk:8 30.0s ------ > [internal] load metadata for docker.io/library/openjdk:8: ------ failed to solve with frontend dockerfile.v0: failed to create LLB definition: failed to do request: Head registry-1.docker.io/v2/library/openjdk/ma nifests/8: dial tcp 54.236.165.68:443: i/o timeout C:\Docker-Java\Helloworld> My Docker file : FROM openjdk:8 RUN mkdir /app COPY out/production/Helloworld/io/dowlath /app WORKDIR /app cmd java dockerjava Please help on this. Thanks in advance.

[@dowlathbashag65]

@Dalia Abo Sheasha Sorry could not get. I spelled correctly.

[@dowlathbashag65]

@Dalia Abo Sheasha sure.....thnk q

[@dowlathbashag65]

sorry to disturb you.....i took the code from your repo. but mine java version is jdk 1.8. So Docker file i changed the version : # Use the OpenJDK 11 image as the base image FROM openjdk:8 # Create a new app directory for my application files RUN mkdir /app # Copy the app files from host machine to image filesystem COPY out/production/HelloWorldDocker/ /app # Set the directory for executing future commands WORKDIR /app # Run the Main class CMD java Main Still getting the same problem. Microsoft Windows [Version 10.0.19041.928] (c) Microsoft Corporation. All rights reserved. C:\Docker-Java\HelloWorldDocker>docker build -t hello-world:1.0 . 'docker' is not recognized as an internal or external command, operable program or batch file. C:\Docker-Java\HelloWorldDocker>docker version 'docker' is not recognized as an internal or external command, operable program or batch file. C:\Docker-Java\HelloWorldDocker>docker version Client: Cloud integration: 1.0.14 Version: 20.10.6 API version: 1.41 Go version: go1.16.3 Git commit: 370c289 Built: Fri Apr 9 22:49:36 2021 OS/Arch: windows/amd64 Context: default Experimental: true Server: Docker Engine - Community Engine: Version: 20.10.6 API version: 1.41 (minimum version 1.12) Go version: go1.13.15 Git commit: 8728dd2 Built: Fri Apr 9 22:44:56 2021 OS/Arch: linux/amd64 Experimental: false containerd: Version: 1.4.4 GitCommit: 05f951a3781f4f2c1911b05e61c160e9c30eaa8e runc: Version: 1.0.0-rc93 GitCommit: 12644e614e25b05da6fd08a38ffa0cfe1903fdec docker-init: Version: 0.19.0 GitCommit: de40ad0 C:\Docker-Java\HelloWorldDocker>docker build -t hello-world:1.0 . [+] Building 5.4s (8/9) => [internal] load build definition from Dockerfile 0.1s => => transferring dockerfile: 371B 0.0s => [internal] load .dockerignore 0.1s => => transferring context: 2B 0.0s => [internal] load metadata for docker.io/library/openjdk:8 5.1s => [auth] library/openjdk:pull token for registry-1.docker.io 0.0s => [internal] load build context 0.1s => => transferring context: 2B 0.0s => CANCELED [1/4] FROM docker.io/library/openjdk:8@sha256:96c15b4ddc92615cc8ab30b60deba963232de521784661e1ab886b64a35a0149 0.1s => => resolve docker.io/library/openjdk:8@sha256:96c15b4ddc92615cc8ab30b60deba963232de521784661e1ab886b64a35a0149 0.0s => => sha256:96c15b4ddc92615cc8ab30b60deba963232de521784661e1ab886b64a35a0149 1.04kB / 1.04kB 0.0s => => sha256:48ff6191b3690194799579907f169ee28929cb4f04b391957232b69b3a139abb 7.83kB / 7.83kB 0.0s => => sha256:e35928794b16a9ae525cb294eadb94d1056f7ee4b0b2b204720233cda9d7ca7b 1.79kB / 1.79kB 0.0s => CACHED [2/4] RUN mkdir /app 0.0s => ERROR [3/4] COPY out/production/HelloWorldDocker/ /app 0.0s ------ > [3/4] COPY out/production/HelloWorldDocker/ /app: ------ failed to compute cache key: failed to walk /var/lib/docker/tmp/buildkit-mount144797670/out/production: lstat /var/lib/docker/tmp/buildkit-mount144797670/o ut/production: no such file or directory C:\Docker-Java\HelloWorldDocker>

[@SamSepiol127]

I get this error and I actually don't know why "Error: LinkageError occurred while loading main class Main java.lang.UnsupportedClassVersionError: Main has been compiled by a more recent versio n of the Java Runtime (class file version 63.0), this version of the Java Runtime only recogni zes class file versions up to 62.0" anyone knows? I try change different java version or change "FROM openjdk: latest" but still the same

[@ligmagrinder9775]

your project version is higher than version you added do docker file

[@SamSepiol127]

thankyou! I'll give it a try@@ligmagrinder9775

[@jatinsharma3792]

Perfect !!!

[@dirkus3722]

Thank you!

[@JetBrainsTV]

You're welcome!

[@nyancat370]

Amazing! Thank you so much!