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postgresqldockerflaskdocker-composeponyorm

How do you register a Postgres container host on docker-compose up?

I have an app (Flask/Pony ORM) container that must register the host for a postgres db container on start up. How can I get the host's (postgres container) location?

On my local set up I have "localhost" but this does not work in the app container.

I tried "172.17.0.2" which was what the pg containers IP when I was not using docker-compose.

But both of these return an error.

Is there a way to specify a host location for a particular container in the docker-compose file?

Solution

  • You must link your two containers in your docker-compose file. Then you will be able to access to your database using the service name of the container.

    Example

    links:
  - postgres:postgres

    Link your docker-compose.yml if you need more help.