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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

Canary Deployment
A deployment strategy that gradually rolls out changes to a small subset of users before deploying to the entire infrastructure.
Kubernetes
An open-source container orchestration platform that automates deploying, scaling, and managing containerized applications.
API Gateway
A server that acts as the single entry point for API requests, handling routing, authentication, rate limiting, and monitoring.
Rolling Update
A deployment strategy that gradually replaces old application instances with new ones, maintaining availability throughout.
GitHub Actions
A CI/CD platform integrated into GitHub that automates build, test, and deployment workflows using YAML configuration.
Vault
A tool by HashiCorp for securely managing secrets, encryption keys, and certificates with dynamic secret generation.
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