How to Host an App on Docker Registry

A Docker registry is a system that stores and distributes Docker images. There are many images hosted in a registry center. An image can have multiple versions, each identified by a different tag.

A registry allows users to pull images from Docker and submit new images to host them. This allows you to have a copy of your application online. It also allows you to share the images with others.

Find out everything you need to push an application image to the Docker registry.

Why use the Docker registry?

Although there are many public registries online, DockerHub is very popular. The Docker registry is a product of Docker Inc, the company behind the Docker platform itself. It hosts public and private repositories. You can use public repositories or pay for restricted private repositories.

The Docker registry provides automated builds, enterprise accounts, and source control integration. The setup is very similar to GitHub, the open source collaborative platform. The Docker engine interacts with the Docker registry by default. You can also run your CI/CD processes.

You can learn more about Docker logging by deploying a demo application.

Create a Docker registry account

Start by navigating to the DockerHub website and register an account there.

Docker Hub registration page

Once you’ve registered and logged in, you’ll have access to your Docker account.

inside the new docker account

You must create a repository to push a demo application image. Click on the create repository button, then provide a Name Y Description from the repository. You can choose whether you want your repository to be public or private. Docker registration gives you access to one free private repository and several public ones.

create repository in docker hub

Pull an image from Docker

To test the process, pull a sample Docker image from Docker Hub. You can pull an Ubuntu image using this command:

docker pull ubuntu

Ubuntu is one of the official Docker images. You then need to push it into your own Docker repository.

Push your image to the docker registry

Now you need to push the image from your local machine to the Docker Hub repository. All repositories contain instructions on how to insert images into them. You will need to use this specific syntax to structure your local image before pushing it to your repository. It should appear like this:

repo instructions on how to push the docker image

Rename the image in your local repository so that it has the same name as the command in the remote repository. You can do this with the following command:

docker tag ubuntu:latest sandra35/testrepo:latest

When the process is complete, you should see the image with the new name and label among your images.

Then go ahead and send the image to the registry with the following command:

docker push sandra35/testrepo:latest

A successful push will look like this:

successful push to docker registry

Now, navigate to your remote Docker repository in your browser. You should see the image in the repository when you refresh the page.

successful image push to docker registry

Congratulations, you have successfully hosted an image in the Docker registry! You can check the application logs by clicking on the image.

Using the same method, you can host your own applications. The size of your application will increase the volume of the hosted image. The registry stores the image until you delete it. You can share your image with anyone on the Internet.

The Docker Registry is the best registry

Docker logging is one of the great features of the Docker software system. The registry optimizes the storage and distribution of images online. You can quickly build containerized apps and ship them online.

The Docker registry hosts an unlimited number of applications in its public repositories. Alternatively, you can create private paid repositories restricted to a particular audience.

Start using the Docker registry and change the way you store and share apps.

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