Control startup and shutdown order in Compose


Docker's documentation refers to and describes Compose V2 functionality.

Effective July 2023, Compose V1 stopped receiving updates and is no longer in new Docker Desktop releases. Compose V2 has replaced it and is now integrated into all current Docker Desktop versions. For more information, see Migrate to Compose V2.

You can control the order of service startup and shutdown with the depends_on attribute. Compose always starts and stops containers in dependency order, where dependencies are determined by depends_on, links, volumes_from, and network_mode: "service:...".

A good example of when you might use this is an application which needs to access a database. If both services are started with docker compose up, there is a chance this will fail since the application service might start before the database service and won't find a database able to handle its SQL statements.

Control startup

On startup, Compose does not wait until a container is "ready", only until it's running. This can cause issues if, for example, you have a relational database system that needs to start its own services before being able to handle incoming connections.

The solution for detecting the ready state of a service is to use the condition attribute with one of the following options:

  • service_started
  • service_healthy. This specifies that a dependency is expected to be “healthy”, which is defined with healthcheck, before starting a dependent service.
  • service_completed_successfully. This specifies that a dependency is expected to run to successful completion before starting a dependent service.

Reference information