Well from a 12-factor app perspective, having each container dump its output to stderr/stdout is basically perfect as long as docker has a pluggable mechanism f

Well from a 12-factor app perspective, having each container dump its output to stderr/stdout is basically perfect as long as docker has a pluggable mechanism for dealing with that output. The "docker attach" API is all that you need, since you can attach prior to starting the container. Then you just need a way to tell docker not to save the logs via some "--disable-logging" option to "docker run" and "docker start".