DevOps Intermediate

What is Docker Compose?

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

Docker Compose defines multi-container applications in a docker-compose.yml file. Services, networks, and volumes are declared, and a single command (docker compose up) starts everything. This is ideal for development environments and simple deployments.

A typical configuration includes application server, database, cache (Redis), and reverse proxy containers with defined dependencies, environment variables, port mappings, and volume mounts.

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Related Terms

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

Immutable Deployment

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

An infrastructure layer that handles service-to-service communication, providing load balancing, encryption, and observability.

Blue-Green Deployment

A deployment strategy using two identical environments where traffic is switched from the old version to the new one instantly.

A platform for continuous code quality inspection that detects bugs, vulnerabilities, and code smells through static analysis.

Chaos Engineering

The discipline of deliberately introducing failures into a system to test its resilience and identify weaknesses before they cause outages.

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