DevOps Intermediate

What is Docker?

A platform for building, shipping, and running applications in lightweight, isolated containers.

Docker packages applications and their dependencies into containers — standardized units that run consistently across any environment. Unlike virtual machines, containers share the host OS kernel, making them lightweight and fast.

Key concepts include Dockerfiles (build instructions), images (templates), containers (running instances), volumes (persistent storage), and Docker Compose (multi-container apps).

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Microservices with Docker and Kubernetes

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Docker Security & Production Hardening

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Docker Fundamentals

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Related Terms

A mechanism for persisting data generated by Docker containers, surviving container restarts and removals.

An endpoint or mechanism that reports whether an application is running correctly and ready to handle requests.

Artifact Repository

A centralized storage system for build artifacts like compiled binaries, packages, and container images used in CI/CD pipelines.

Infrastructure as Code (IaC)

The practice of managing infrastructure through machine-readable configuration files rather than manual processes.

A tool for defining and running multi-container Docker applications using a YAML configuration file.

Immutable Deployment

A deployment strategy where new versions replace existing instances entirely rather than updating them in place.

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