enable airflow port flexibility

[peterkasson]

Port 8080 is sometimes in use from other software (currently dealing with such a case). It would be good to have a portnum argument similar to postgres portnum exposed.

[peterkasson]

Looks like environment variable in airflow is AIRFLOW__WEBSERVER__WEB_SERVER_PORT. Maybe we just document that to start?

[andre-merzky]

Joe's last PR addresses this issue: https://github.com/ejjordan/airflowHPC/pull/48/files#diff-57d36c6af02723b26119262e31da9ebdd8440eefa9d55b6fc48bf2cf60a6002f

[peterkasson]

I thought that PR 48 had the database port but not the webserver port...?

[andre-merzky]

Oh, I am sorry, I should have read that more carefully... But I can add a patch to that PR to take care of the webserver port also.

[peterkasson]

Thanks - with the environment variable, it should be pretty straightforward. If you break out the airflow invocations of webserver and scheduler, there's also a command-line option for the webserver, but the environment variable stays idiomatic with what we have.