intermediate~4h
Docker Compose: Services, Networks, Volumes, Scaling & Health Checks
Docker Compose is a declarative tool for defining and running multi-container applications from a single YAML file (compose.yaml). It is the standard local-development and small-deployment tool for an
Learning objectives
- Explain what problem Docker Compose solves that running several `docker run` commands by hand doesn't.
- Read a docker-compose.yml file and predict what networks, volumes, and dependency order it creates.
- Explain what a health check actually verifies, and why `depends_on` alone isn't enough to guarantee a dependent service is ready.
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Docker Compose: Services, Networks, Volumes, Scaling & Health Checks