Infrastructure2026-05-17
Docker
Also known as: Docker / ドッカー
A platform for packaging applications and their dependencies as containers. It eliminates environment differences to guarantee reproducible builds, and forms the foundation for CI/CD pipelines and Kubernetes deployments.
Overview
Docker uses Dockerfiles to define images and guarantee identical behavior across environments. Docker Compose starts multiple services (app, DB, Redis) together locally. Kubernetes manages and scales Docker images in production clusters.
CI/CD Integration
The standard pipeline in GitHub Actions and GitLab CI builds an image from a Dockerfile, pushes it to a registry, and deploys to a production cluster. The containerization context in legacy system modernization is also relevant.
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