What does the depends_on key in a docker-compose.yml file control?

Question

Docker Fundamentals — Medium

What does the depends_on key in a docker-compose.yml file control?

Accepted Answer

The depends_on key in a docker-compose.yml file controls the startup order of services. Dependent services will start after their dependencies, but they won't wait for them to be fully ready unless combined with healthcheck and condition: service_healthy.