How to use wait-for-it with docker compose

There is a possibility to control startup order in Compose using great script - wait-for-it. It allows you to wait some docker containers which have long-running initialization process like databases.

And there is step-by-step explanation how to use it:

1. Copy wait-for-it.sh to your project

1. Copy it to your docker image

   FROM ...
   ...
   COPY wait-for-it.sh .
   ...
   CMD ...
   

2. Modify docker-compose.yml to call wait-for-it script:

   service:
    image: service:latest
    expose:
        - "80"
    depends_on:
        - database
    command: ["./wait-for-it.sh", "database:3306", "--timeout=360", "--", "command"]
   

   where

   • command is a command which will be called by wait-for-it script after timeout or successful ping result to database:3306

Thanks.