How to make Docker Compose wait for container X before starting Y?
You can make Docker Compose wait for a container X to be fully up and running before starting container Y by using the depends_on option in your docker-compose.yml file.
The depends_on option allows you to specify dependencies between services. By default, Docker Compose starts all services simultaneously, but you can use depends_on to specify that a service should wait for another service to be fully up and running before starting.
Here is an example docker-compose.yml file that shows how to use the depends_on option:
version: "3"
services:
service-x:
build: .
ports:
- "8080:8080"
service-y:
build: .
ports:
- "8081:8081"
depends_on:
- service-x
In this example, we have two services, service-x and service-y. The depends_on option is used to specify that service-y should wait for service-x to be fully up and running before starting. This means that Docker Compose will start service-x first and wait for it to be fully up and running before starting service-y.
Note that the depends_on option does not guarantee that the dependent service is fully up and running, it only waits for the container to be started. It is recommended to use a health check to make sure that the dependent service is fully up and running before starting the dependent service.
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
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