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Docker is a free and open platform for developing, shipping, and running apps. Docker allows you to decouple your apps from your infrastructure, enabling you to deliver software swiftly. This will enable employees to work remotely, which has been linked to many unexpected advantages, which you can learn about here. 

With Docker, you can manage your infrastructure the same way you control your application. You may drastically decrease the delay between writing code and executing it in production by leveraging Docker’s approaches for shipping, testing, and deploying code quickly. In addition, its services, such as Docker Hub and Docker Registry, make using Docker easier. Read on to find out more about them.  

Docker Hub

Docker Hub is Docker’s official cloud-based Docker image registry.  It features content from various sources such as container community developers, open-source projects, and independent software vendors (ISVs) who build and distribute their code in containers. In addition, users can choose between using free public repositories for storing and sharing photographs or paying for private repositories. 

Why Use Docker Hub?

Docker Hub provides the following key features: 

Repositories allow you to store and distribute container images with your team or the Docker community at large. Each repository can store a vast number of photographs that are tagged and structured. 

Teams and Organizations—in Docker Hub, you may build an organization entity and one or more teams inside it that contain Docker Hub users, giving you control over access to your private repositories or specific images. 

Official Docker Images—curated Docker images that include base operating system images, programming language runtimes, and open-source data storage. The Docker Library Project reviews and publishes official Docker Images. They follow Dockerfile best practices, give detailed documentation, and update regularly. 

Software manufacturers can use the Docker Verified Publisher Program to open official repositories on Docker Hub to publish validated container images. The Verified Publisher label indicates that a trusted software vendor produced and signed the repository, lowering the risk of pulling fraudulent or vulnerable pictures. 

Docker Hub‘s Automated Builds feature allows you to produce images from source code stored in an external repository. For example, in a Git repository, you may create branches and tags to indicate which code should be built into a Docker image, and a webhook triggers a fresh build on Docker Hub when you push code. 

When an image is pushed to a Docker Hub repository, Webhooks allow you to trigger an action in another service. This may, for example, cause all new photos to be subjected to software checks. 

Docker Registry

The Registry is an open-source server-side application that stores and distributes Docker images. It is stateless and highly scalable. This application should be used by users who want to control where their images are stored or fully own your images distribution pipeline. Docker Registry allows the user to integrate image storage and distribution tightly into your in-house development workflow. 

A registry will consist of numerous repositories containing photos from a single project in many circumstances. Tags are used to distinguish between versions of an image within a repository. Users can pull (download) photos for use or push (submit) images to be stored in a registry. 

Registries can help enable stricter version control and make it easier to manage and distribute images by providing a centralized source for images. Many registry services will also include additional capabilities that aid in the automation and security of build and deployment processes. 

Docker registries can be hosted on-premises or in the cloud. You can also host your own Docker Registry, but exploring other alternatives is generally worth it. Other popular Docker registries, in addition to Docker Hub, include:  

• Quay 
• The Container Registry at Google 
• Elastic Container Registry (ECR) by Amazon (ECR) 

Use Cases

Having your Registry is an excellent way to complement and integrate your CI/CD system. For example, in a typical workflow, a commit to your source revision control system would initiate a build on your continuous integration system, which, if successful, would push a new image to your Registry. A signal from the Registry would then initiate a staging environment deployment or alert other systems to the availability of a new image. 

If you want to swiftly deploy a new image across a big cluster of servers, it’s also a must-have component. Finally, it is the most efficient method of disseminating photos within a closed network. 

Conclusion 

Unlike Crypto, which has an uncertain future, Docker is well-known and widely used. However, grasping the nuances of the ecology might be difficult. This article discussed the use of Docker Hub and Docker Registry in detail. Docker registry is a platform where Docker Images are stored and distributed, while Docker Hub is the company’s official cloud registry.