Push & Pull Image to Docker Hub

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Hi everyone,

In this post, I try to show you how to push and pull docker image from DockerHub. I assume that you have some knowledge about docker and docker hub. If not ,don't worry keep going reading. First of all, we need to have an DockerHub account. If you don't have you can join with DockerHub website. After that you need to install docker to your environment. You can find more information here how to install docker to your environment. I will use docker command line interface when try to show you the demo that I created.

The detailed video available in YouTube.

This is our roadmap,

Push Image

First of all, we will create a repository in DockerHub that name is docker-demo. Make public the repository. I have created a repository like below.

Docker Hub Registry

After creating a repository in DockerHub, we need to have an application that run on the web environment. We will create its image and will push them to DockerHub. I will use my sample demo application. You can find it on my github profile.

You can install the sample application to your system. After that you need to create a fat jar with maven. It is easy, just type below command.

mvn clean install

You will see the <your-app>.jar file in your target folder when it's done.

The Dockerfile is below.

FROM openjdk:8
ADD ./target/*.jar /usr/src/my-sample-app.jar
WORKDIR usr/src
ENTRYPOINT ["java","-jar", "my-sample-app.jar"]

After doing this setup, everything is easy for us. I will just build docker image with docker command. Just type below command to build your application image.

docker build -t docker-demo .

docker-build.png

docker-images.png

After build docker image, we need to tag our image. You can use tag command like below.

docker tag <Image ID> coderkan/docker-demo

docker-tag.png

Pushing your image to DockerHub is easy after tagged image. You can type push command like below.

docker push coderkan/docker-demo

You will just wait when uploading image to repository. You will see the uploaded image like below image.

docker-push.png

After uploading your image to DockerHub, you will see immediately your image in the repository.

docker-hub-uploaded.png

Pull Image

Pulling an image from DockerHub is easy. First of all, you need to go to your profile and get the repository name. I got the name docker-demo. Then you just type below command to your terminal to get latest image from DockerHub.

docker pull coderkan/docker-demo:latest

You can see the installed images with docker images. You will see the details like below.

docker-pull.png

Running Application

You need to run this installed image with run command.

 docker run -p 8080:8080 coderkan/docker-demo

You will see the Started DockerDemoApplication in xxx seconds.. This means that your application is started successfully. Now, you can check if the application is running or not with Browser.

docker-run.png

hello-world.png

I hope this post help you to usage of pull or push images to DockerHub.

I hope you enjoy while reading.

Have a nice coding.

Photo by Kyle Ryan on Unsplash

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