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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Docker for Web Developers

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Related Terms

A human-readable data serialization language commonly used for configuration files in DevOps tools and applications.

An architectural style where an application is composed of small, independent services that communicate over APIs.

SRE (Site Reliability Engineering)

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

Continuous Integration and Continuous Deployment — automated practices for building, testing, and deploying code changes.

Environment Variable

A dynamic value stored outside the application code that configures behavior without hardcoding sensitive or environment-specific data.

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

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