Container registries
Where container images live and how to use registries well: repositories, tags and digests, Docker Hub, GitHub Container Registry, Amazon ECR, Google Artifact Registry and Azure Container Registry, pushing and pulling, authentication from CI and Kubernetes, tagging strategies, immutability, scanning and signing images, and retention policies.
CodexBash, , 5 min read
When you build a Docker image, it lives only on your machine until you push it to a container registry: a server that stores images and serves them to whatever needs to run them, such as a colleague's laptop, a CI pipeline, a server or a Kubernetes cluster. Registries are a central part of every container workflow, and how you tag, secure and clean them affects reliability, security and cost. This article explains how registries work and how to use them well.
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