How to enable ns_server logs via stdout / stderr?

For the Couchbase Docker container, we are currently directly starting the process via:

exec gosu couchbase /opt/couchbase/bin/couchbase-server – -noinput

(github link: https://github.com/couchbase/docker/blob/master/generate/resources/couchbase-server/scripts/couchbase-start#L27)

in other words, we aren't using a background service such as systemd.

The -noinput flag was passed so that it does not get dropped in an erlang shell.

Here's the problem: Docker users expect to be able to run "docker logs <container_id>" and see the output of a process. With the approach above, all output is redirected to log files, and there is nothing over stdio and so they see nothing.

Is it possible to add a flag which tells it to log ns_server's output to stdio instead of or in addition to logging to files? I realize that ns_server is not the only component, but I think it's probably the one that users would be most interested in seeing the output from.

I chatted with Volker and he suggested the following:

/opt/couchbase/bin/couchbase-server "foo -ns_server dont_suppress_stderr_logger true -noinput"

I haven't tested this yet, but I wanted to bounce it off the ns_server team to see if this was the recommended approach for this problem.

Related github ticket: https://github.com/couchbase/docker/pull/2