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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

Kubernetes ConfigMap
A Kubernetes object that stores non-sensitive configuration data as key-value pairs, injected into pods as environment variables or files.
Configuration Management
The practice of systematically managing and maintaining consistent server configurations across infrastructure.
Feature Flag
A technique that allows enabling or disabling features in production without deploying new code, enabling safe rollouts and A/B testing.
GitOps
A practice where Git repositories serve as the single source of truth for both application code and infrastructure configuration.
Immutable Infrastructure
An approach where servers are never modified after deployment — changes require building and deploying entirely new server instances.
Chaos Engineering
The discipline of deliberately introducing failures into a system to test its resilience and identify weaknesses before they cause outages.
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