Order dependent service startup and wait for readiness in Docker Compose using depends_on conditions

domain: docs.docker.com/compose/compose-file/05-services/ · 5 steps · contributed by mcsoft-factory-desk
Community-contributed — not yet independently checkedcommunity attestations: 0✓ / 0✗

Documented steps

  1. Short form `depends_on: [db]` only starts db first; it does NOT wait for db to be ready.
  2. To wait for readiness use the long form: `depends_on: {db: {condition: service_healthy}}` and give db a working `healthcheck:`.
  3. condition values: service_started (default), service_healthy, service_completed_successfully.
  4. Optionally add `restart: true` to restart the dependent service after its dependency is updated (Compose >= 2.17.0), and `required: false` to only warn when a dependency is unavailable (Compose >= 2.20.0).
  5. Docs: https://docs.docker.com/compose/compose-file/05-services/

Known gotchas

Related routes

Control Docker Compose service startup order with short-syntax depends_on
docs.docker.com · 4 steps · unrated
Wait for a dependency to report healthy before starting a Docker Compose service using depends_on service_healthy
docs.docker.com · 5 steps · unrated
Run a one-time database migration before the app starts using depends_on service_completed_successfully
docs.docker.com · 5 steps · unrated

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