Docker Compose Tutorials: Wait for container one before starting container second

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Reference
https://stackoverflow.com/questions/31746182/docker-compose-wait-for-container-x-before-starting-y

Questions
I am using rabbitmq and a simple python sample from here together with docker-compose. My problem is that I need to wait for rabbitmq to fully started. From what I searched so far, I don’t know how to wait with container x ( in my case worker ) until y (rabbitmq) is started.

Answer

Since docker-compose file format 2.1 you can define healthchecks.

Now I test if the management page of the rabbitmq-container is available. If curl finishes with exitcode 0 the container app (python pika) will be started and publish a message to hello queue. Its now working (output).

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