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DevOps & Automation · Foundational

Container Registry

A service that stores and distributes container images, such as Docker Hub, Amazon ECR, Azure Container Registry, Google Artifact Registry, Quay, or Harbor.

Definition

Registries organize images into repositories and tags, support authentication, vulnerability scanning, replication, and immutability settings. Kubernetes pulls images using imagePullSecrets or node identity.

Example

docker push 123456789012.dkr.ecr.us-east-1.amazonaws.com/api:1.2

Exam tip

Know each cloud's registry: ECR (AWS), ACR (Azure), Artifact Registry (Google; Container Registry is deprecated).

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