Standardised approach to logging

[smebberson]

We need to move toward a standardised approach to logging. Some of the images do it differently at the moment.

The main factor is, should everything be splurted to stdout and stderr? We need to have a way to turn it off however.

I think in all instances, they should also go to file, so that any file based aggregation can take place.

Any other thoughts?

[rbellamy]

The default guidance is to splurt everything to stdout and stderr which is consistent with the mandate of the 12 Factor app on logging.

[rbellamy]

About "going to a file" I think that places an undue burden on the user of the image, as not every container will have storage that can support the persisted storage of log files...