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DevOps Intermediate

What is Container Registry?

A storage and distribution service for container images, similar to a package repository but for Docker images.

Container registries store, version, and distribute container images. Docker Hub is the default public registry. Private registries include Amazon ECR, Google Container Registry, Azure Container Registry, and GitHub Container Registry.

Features include vulnerability scanning, image signing, access control, and automated builds. Images are identified by repository:tag (e.g., nginx:1.25-alpine). Registry best practices include scanning for vulnerabilities, using specific tags (not latest), and implementing image retention policies.

Related Terms

Containerization
A lightweight virtualization method that packages applications with their dependencies into isolated, portable containers.
Terraform
An open-source tool for provisioning and managing cloud infrastructure using declarative configuration files.
Git
A distributed version control system that tracks changes in source code during software development.
Makefile
A file containing build rules and commands that automates compilation and common project tasks using the make utility.
Vault
A tool by HashiCorp for securely managing secrets, encryption keys, and certificates with dynamic secret generation.
Kubernetes ConfigMap
A Kubernetes object that stores non-sensitive configuration data as key-value pairs, injected into pods as environment variables or files.
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