What is Docker?
Docker packages an application and its declared dependencies into an image; Docker Engine runs that image as a container. Images can be rebuilt and shared, while data that must outlive a container needs an explicit persistence design. Docker Compose describes and starts related services from a configuration file, which is useful for a web app and its database during development.
Read the full overview
Sources checked 27 September 2026: Docker overview and Compose quickstart.
Key capabilities
- Dockerfile and build: instructions to produce an application image.
- Docker Engine: create and run containers from images.
- Docker Compose: define services, networks, and volumes together.
- Registry workflow: publish and retrieve images for reuse by other environments.
Key operating questions include image provenance, update cadence, persistent volumes, resource limits, and secret handling. Containers isolate processes, but Docker's own documentation does not present that isolation as a substitute for host or supply-chain security.
Docker is a packaging and runtime workflow, not a complete production orchestration strategy. It helps teams create repeatable local environments and deploy the same image through later stages, while the target platform, secrets, storage, networking, and image maintenance still need deliberate setup.
Docker makes the deployable unit explicit: an image that can be built, reviewed, and run in a defined container environment. The official overview and Compose guide were checked 27 September 2026. This profile does not assume identical behavior across all hosts or claim a measured security improvement.
Technical details
- Access
- Self-hosted
- Source model
- Open source
- Founded
- 2013
- Headquarters
- Palo Alto, California, USA
- Pricing model
- Freemium
- Starting price
- 0 USD
- API
- Available
- Website
- www.docker.com ↗
Official resources
What to verify for your environment
Start from the users, systems and operating responsibilities the tool needs to support.
- Confirm current features, licensing and support terms with the publisher.
- Validate deployment, data location, access control, backup and recovery requirements.
- Test integrations, export paths and a representative operational workflow before committing.
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Reviews of Docker
Essential for modern development5/5 starsDocker has completely standardized our development and deployment workflow. Every developer runs the same environment locally, and our CI/CD pipeline builds identical images that run in production. Docker Compose makes local development with multiple services painless.
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