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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Docker Compose & Multi-Container Applications

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Related Terms

The acceptable amount of unreliability allowed for a service, calculated as 100% minus the Service Level Objective.

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

A branching model for Git that defines a strict workflow with feature, develop, release, hotfix, and main branches.

A deployment strategy that gradually replaces old application instances with new ones, maintaining availability throughout.

Container Orchestration

The automated management of containerized applications including deployment, scaling, networking, and health monitoring across clusters.

SRE (Site Reliability Engineering)

An engineering discipline that applies software engineering principles to infrastructure and operations to create reliable systems.

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