Support running postgresql in a separate container

[alexanderkjeldaas]

Hi, I think it would be better if this docker container supported running postgresql in a separate container and link them together. I don't know tryton that well, but this makes it possible to manage data independently from the application, and this is typically the best way to setup docker. For example a server could potentially reuse a postgresql database across multiple containers.

docker run --name postgresql -e ROOT_PASSWORD=foo -d postgresql
docker run --name tryton --link postgresql:db -d tryton

[sharoonthomas]

@alexanderkjeldaas I agree with the concept and I think that is already the way it is. This Dockerfile does not install postgres. It could connect to the postgres server (another docker container, IP, domain name) specified in the trytond.conf file.

@prakashpp does trytond use PG* environment variables for connection if not specified in trytond.conf ?

[prakashpp]

@sharoonthomas trytond uses TRYTOND_DATABASE_URI variable to connect to db. We can use this uri to run tests on postgres.