Traefik on Docker Swarm and Filebeat - a logging problem

For a while, I have been running a 3-node Docker Swarm. I am very satisfied with it, it does the trick for my personal apps, website and lab setup very well, Kubernetes would be overkill for this sort of setup, and Portainer is an excellent UI for it. Of course, like any DevOps oriented Systems Engineer, I use the ELBK (Elasticsearch, Logstash, Beats, Kibana) stack for logging and monitoring this setup.