You can run your docker container supervised with tools like systemd, runit etc - and have stderr/stdout (and signals) forwarded on from the container process t

You can run your docker container supervised with tools like systemd, runit etc - and have stderr/stdout (and signals) forwarded on from the container process to the supervisor - from then on you do what you would normally do if it wasn't running in docker. Other approaches are to have the app(s) in container log to a VOLUME that is bind-mounted in from the underlying host (where you can access them directly) - yet another approach is to bind mount in syslog or other tools into the container and allow the process(s) inside the container to log to it. All work well.