Enable aggregated logs

[hferentschik]

https://blog.openshift.com/openshift-3-1-logging-metrics-overview/

[hferentschik]

See also https://docs.openshift.org/latest/getting_started/administrators.html#running-in-a-docker-container

If you want to use OpenShift’s aggregated logging, you must add -v /var/log:/var/log to the docker command line. The origin container must have access to the host’s var/log/containers/ and /var/log/messages.