Docker

Docker releases define containerization standards and cloud-native development workflows, with Docker Inc. and the open-source community delivering platform updates that shape application packaging, deployment automation, and microservices architecture for organizations worldwide. This complete Docker release history documents every major version from Docker 1.0 through the latest updates, tracking container runtime enhancements, build system improvements, security hardening, and orchestration capabilities that affect DevOps engineers, platform architects, and backend developers building containerized applications.

Since Solomon Hykes’ 2013 introduction at PyCon, Docker has evolved from a lightweight LXC wrapper into the industry standard for application containerization—powering development workflows at Netflix, Uber, PayPal, and countless startups. Each release introduces critical capabilities: multi-stage builds revolutionized image optimization in 17.05, BuildKit enabled parallel builds and caching in 18.09, Docker Compose became integrated with the CLI in 19.03+, and multi-platform builds simplified ARM/AMD64 targeting. Understanding Docker evolution helps teams optimize CI/CD pipelines, reduce image sizes, and adopt security best practices.

Why Track Docker Releases?

Optimize Build Performance and Image Sizes Docker releases frequently introduce build system improvements: BuildKit’s parallel layer builds, cache mount optimization, secret management for credentials, and heredoc support for inline files. Tracking releases helps DevOps teams discover features that cut CI/CD build times 30-50% and reduce production image sizes 40-60%—directly impacting deployment speed and cloud storage costs.

Adopt Security Features and Vulnerability Mitigations New Docker versions regularly add security capabilities: rootless mode, user namespace remapping, secrets management, content trust signing, and Seccomp/AppArmor profile improvements. Understanding release security content helps platform engineers implement defense-in-depth container security strategies and meet compliance requirements without third-party tools.

Leverage Docker Compose and Multi-Container Orchestration Docker Compose evolves with each release: Compose Specification standardization, profiles for environment-specific services, health checks, and dependency ordering improvements. Tracking releases helps development teams simplify local development environments and streamline Docker Compose deployments in production scenarios (when Kubernetes is overkill).

Navigate Breaking Changes and Deprecations Docker periodically deprecates legacy features: old Compose file versions, deprecated API endpoints, legacy networking modes, and obsolete storage drivers. Our release guides document deprecation timelines and migration paths, preventing surprise breakage when upgrading Docker Engine in production or CI/CD systems.

Use Cases: Who Uses This Release History?

DevOps Engineers and CI/CD Architects Track BuildKit improvements, cache optimization strategies, and CI-specific features (–progress, –output modes). Understand when new Docker versions enable faster GitHub Actions/GitLab CI builds, when to adopt layer caching improvements, or when Docker-in-Docker behavior changes.

Platform Engineers and Kubernetes Operators Monitor containerd integration changes, container runtime interface (CRI) updates, and security improvements affecting Kubernetes nodes. Know when Docker Engine versions introduce features benefiting container orchestration or when to migrate to containerd directly.

Backend Developers and Application Engineers Track Docker Compose enhancements, multi-platform build capabilities, and development workflow improvements. Understand when new Docker versions simplify Dockerfile syntax (heredocs, bind mounts), enable Apple Silicon development, or improve hot-reload experiences.

Security Engineers and Compliance Teams Monitor rootless Docker maturation, Seccomp profile updates, vulnerability scanning integration, and supply chain security features (SBOM generation, content trust). Track when Docker versions close security gaps affecting container escape risks or image tampering.

Cloud Architects and Infrastructure Teams Plan Docker Engine upgrades across EC2 instances, ECS tasks, or VM fleets. Understand when storage driver improvements affect I/O performance, when networking changes require testing, or when log driver updates affect centralized logging strategies.

FAQ Section

How often does Docker release new versions? Docker Engine (open-source runtime) follows a monthly release cadence for minor versions with feature additions and bug fixes. Docker Desktop (commercial product for Mac/Windows) releases major versions quarterly with UI and integration improvements. Critical security patches ship as needed. This hub tracks both Docker Engine and Docker Desktop significant releases.

What’s the difference between Docker Engine and Docker Desktop? Docker Engine is the open-source container runtime (daemon, CLI, containerd) running on Linux servers—free for all uses. Docker Desktop is a commercial application for Mac and Windows providing Docker Engine in a VM, plus GUI management, Kubernetes integration, and development tools—free for small businesses, paid for enterprises with 250+ employees or $10M+ revenue.

Can I run different Docker versions in different environments? Not recommended but technically possible. Development, staging, and production should use aligned Docker versions to avoid “works on my machine” issues. Use Docker version pinning in IaC tools (Terraform, Ansible) and base image tags. Our release guides help assess when version skew causes compatibility issues.

How do I know if upgrading Docker will break my containers? Check our release guide for the target version—we document breaking changes, deprecated features, and behavior changes. Test with your actual containers in staging: rebuild images, run integration tests, verify networking and volume behaviors. Most Docker upgrades are backward compatible, but storage driver or API changes can surprise.

What are multi-stage builds and should I use them? Multi-stage builds (Docker 17.05+) use multiple FROM statements in one Dockerfile, copying artifacts between stages. This separates build dependencies from runtime dependencies, dramatically reducing final image sizes (node apps: 1GB → 150MB). Yes, use them for production images—our guides track multi-stage build improvements per release.

Should I use BuildKit or legacy Docker build? Always use BuildKit (DOCKER_BUILDKIT=1 or default in Docker 23.0+). BuildKit enables parallel layer builds, improved caching (–mount=type=cache), secrets management, and SSH forwarding. It’s significantly faster and more powerful than legacy builds. Our guides track BuildKit feature additions per release.

What’s the difference between Docker Compose V1 and V2? Compose V1 (docker-compose, Python) is deprecated and unsupported. Compose V2 (docker compose, Go) is integrated with Docker CLI, faster, and follows the Compose Specification. All development should use Compose V2. Our guides track when Compose V2 reached feature parity and subsequent improvements.

Where does ReleaseRun get Docker release data? We aggregate from official Docker Engine release notes (https://docs.docker.com/engine/release-notes/), Docker Desktop release notes (https://docs.docker.com/desktop/release-notes/), the Docker blog (https://www.docker.com/blog/), and GitHub repositories (moby/moby, docker/compose). Each release guide links to original announcements and feature documentation.

How detailed are ReleaseRun’s Docker release guides? Our guides average [~1,000] words and include: comprehensive feature breakdowns with Dockerfile examples, BuildKit optimization strategies with benchmark comparisons, security improvement analysis, Docker Compose changes with compose.yaml examples, breaking change documentation with migration paths, multi-platform build guidance, and Kubernetes containerd compatibility notes. They’re designed for DevOps professionals who need strategic context beyond raw changelogs.

Does Docker maintain backward compatibility? Mostly yes for Docker Engine APIs and Dockerfile syntax. Docker follows semantic versioning and maintains API compatibility within major versions. However, Docker periodically removes deprecated features after long deprecation periods (legacy networking, old storage drivers). Our guides distinguish between expected deprecations and surprising breaking changes.

Resources Section

Official Docker Resources

• Docker Engine Release Notes – Official runtime version documentation
• Docker Desktop Release Notes – Desktop application updates
• Docker Blog – Feature announcements and best practices
• Docker Documentation – Comprehensive reference and tutorials
• Moby Project – Open-source Docker Engine repository

How ReleaseRun Complements Official Documentation
Docker’s release notes excel at comprehensive change listings organized by component (Engine, CLI, BuildKit, Compose). ReleaseRun release guides focus on practical DevOps impact: we explain why BuildKit cache mounts matter for monorepo builds, provide before/after Dockerfile examples showing how new syntax reduces image layers, benchmark build time improvements in realistic CI/CD scenarios, categorize changes by persona (backend developers vs. platform engineers vs. security teams), and provide migration timelines for deprecated features. Our guides serve as the strategic implementation layer between Docker’s technical changelog and your containerization strategy, with specific CI/CD optimization techniques and security hardening recipes.