77 lines
2.2 KiB
Markdown
77 lines
2.2 KiB
Markdown
---
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description: High-level overview of the Registry
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keywords: registry, on-prem, images, tags, repository, distribution
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title: Distribution Registry
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---
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## What it is
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The Registry is a stateless, highly scalable server side application that stores
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and lets you distribute container images and other content. The Registry is open-source, under the
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permissive [Apache license](https://en.wikipedia.org/wiki/Apache_License).
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## Why use it
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You should use the Registry if you want to:
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* tightly control where your images are being stored
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* fully own your images distribution pipeline
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* integrate image storage and distribution tightly into your in-house development workflow
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## Alternatives
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Users looking for a zero maintenance, ready-to-go solution are encouraged to
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use one of the existing registry services. Many of these provide support and security
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scanning, and are free for public repositories. For example:
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- [Docker Hub](https://hub.docker.com)
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- [Quay.io](https://quay.io/)
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- [GitHub Packages](https://docs.github.com/en/packages/working-with-a-github-packages-registry/working-with-the-container-registry)
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Cloud infrastructure providers such as [AWS](https://aws.amazon.com/ecr/), [Azure](https://azure.microsoft.com/products/container-registry/), [Google Cloud](https://cloud.google.com/artifact-registry) and [IBM Cloud](https://www.ibm.com/products/container-registry) also have container registry services available at a cost.
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## Compatibility
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The distribution registry implements the [OCI Distribution Spec](https://github.com/opencontainers/distribution-spec) version 1.0.1.
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## Basic commands
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Start your registry
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```sh
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docker run -d -p 5000:5000 --name registry registry:2
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```
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Pull (or build) some image from the hub
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```sh
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docker pull ubuntu
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```
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Tag the image so that it points to your registry
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```sh
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docker image tag ubuntu localhost:5000/myfirstimage
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```
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Push it
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```sh
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docker push localhost:5000/myfirstimage
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```
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Pull it back
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```sh
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docker pull localhost:5000/myfirstimage
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```
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Now stop your registry and remove all data
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```sh
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docker container stop registry && docker container rm -v registry
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```
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## Next
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You should now read the [detailed introduction about the registry](about),
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or jump directly to [deployment instructions](about/deploying).
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