In his keynote at DockerCon 2016, Solomon Hykes, creator and chief architect of Docker, announced that the company was making a big push to create a registry for containers. But what does that mean? And why would you care about it?

A registry is a place where you can store your images. The Docker Hub is the most popular registry, but there are others, like and Amazon ECR.

Docker registries are important because they provide a way for businesses to securely store and share their images. They also offer a way to control who can access those images.

In this blog post, we’ll take a look at what Docker registries are, how they work, and why they’re important for businesses.

What is a Docker Registry?

According to JFrog Docker hub, Docker registries are essentially repositories for Docker images. They provide a centralized place for storing and managing images, which can then be used by developers to pull down and run on their own machines.

Docker registries can be public or private. Public registries are free to use and anyone can access them. Private registries require a login and password, and only those with the credentials can access them.

How Do Docker Registries Work?

Docker Registries Work

Docker registries work by storing images in repositories. Each repository can contain multiple images, and each image can be tagged with a unique identifier.

When you want to use an image from a registry, you pull it down by its tag. For example, you might pull down an image with the tag “latest” or “stable”.

Docker registries also provide metadata about each image, including its size, checksum, and other relevant information.

Why are Docker Registries Important for Businesses?

Containerization is rapidly becoming the new norm for application development and deployment. And as businesses move to this new model, they need a way to store and manage their images.

Docker registries provide a way for businesses to do just that. Let’s take a look at some of the ways that businesses are using registries:

Securely Storing Images

The software development life cycle can be complex, with multiple developers working on different parts of the codebase at the same time. This can lead to a lot of confusion about which version of an image is which.

Docker registries provide a secure way for businesses to store their images. With a private registry, businesses can control who has access to their images and ensure that only authorized users can pull down and use those images.

Having this degree of control is important for businesses that need to comply with security and compliance regulations.

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Sharing Images

With Docker registries, businesses can share images with their developers and teams. This makes it easy for developers to access the images they need, without having to search around for them.

It also makes it possible for businesses to create internal libraries of images that can be used by their teams.

Collaborating on Images

A critical part of any software development project is collaboration. And with Docker registries, businesses can easily collaborate on images.

For example, let’s say a business is developing a new application. They can create a shared repository for the project, and then add their developers to that repository. This way, everyone on the team can access the images they need and can push changes to the shared repository.

This makes it easy for businesses to track changes to their images and to ensure that everyone is working with the most up-to-date versions.

Managing Deployments

Another way that businesses are using Docker registries is to manage deployments. By storing their images in a registry, businesses can easily push changes to their production environments.

This is a much simpler and more efficient way to manage deployments than the traditional model of shipping code changes to servers.

Plus, it makes it possible to roll back changes if necessary.

Managing Deployments


Docker registries are an important tool for businesses that are using containerization. They provide a secure, centralized place for storing and managing images. And they offer a number of benefits, including the ability to share images, collaborate on images, and manage deployments.

If your business is using containers, then you need to be using a Docker registry. And if you’re not using containers, then you should be!

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