Container registry

Container registry is a software that enables container image storage and management. Different Container Registry are available such as AWS ECR, Google Cloud Container Registry, Azure Container Registry (ACR), Jfrog Docker Registry , GitLab Container registry or Docker Hub.

Docker

A Docker registry is a repository for Docker images. Docker clients connect to registries to download (docker pull) images for use or upload (docker push) images. A Docker Registry HTTP API is available to facilitate distribution of images to the docker engine with support for image verification, resumable push and pull operations and layer deduplication.

Docker Registries can be public or private. Two main public registries are Docker Hub and Docker Cloud. Docker Hub is the default registry where Docker looks for images. Docker registries also allow the creation of notifications based on events.

• docker push
• docker pull
• docker login

ECR

AWS ECR is a managed container registry service from AWS available since December 2015 with tagging (see docker tag) support from December 2018

• aws ecr put-image
• aws ecr list-images
• aws ecr describe-images
• aws ecr get-login

Security: aws_ecr_registry_scanning_configuration

Gitlab Container registry

Gitlab Container registry supports different storage backends such us local mounted filesystem or Microsoft Azure Blob Storage, Google Cloud Storage, AWS S3, OpenStack Swift Object Storage or Aliyun OSS.

Activities

1. Use public docker hub container registry to download and run you first image
2. Install GitLab and enable container registry in: /etc/gitlab/gitlab.rb
3. Pull an Image from a Private Registry in Kubernetes
4. Understand kubectl create secret docker-registry in K8s

Related

• registry.k8s.io
• registry.access.redhat.com
• ghcr.io
• gcr.io
• mcr.microsoft.com
• crane tool
• skopeo
• OCI registry
• docker push, aws ecr put-image

See also

• Container Registry: JFrog Container Registry, AWS ECR, Azure container registry, VMware Harbor Registry, Google Cloud Registry, Amazon Elastic Container Registry (ECR), GitLab container registry, crane, gcr.io, ghcr.io
• OCI registry, ORAS, oci://, helm push, Container registry
• Registry, Container registry, infrastructure registry, OCI registry, Docker Hub

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