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.

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Docker Compose & Multi-Container Applications

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Related Terms

A technique that allows enabling or disabling features in production without deploying new code, enabling safe rollouts and A/B testing.

A tool by HashiCorp for securely managing secrets, encryption keys, and certificates with dynamic secret generation.

An open-source automation server for building, testing, and deploying software through configurable CI/CD pipelines.

SRE (Site Reliability Engineering)

An engineering discipline that applies software engineering principles to infrastructure and operations to create reliable systems.

A branching model for Git that defines a strict workflow with feature, develop, release, hotfix, and main branches.

Infrastructure Drift

The divergence between the actual state of infrastructure and its defined desired state, caused by manual changes or untracked modifications.

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