Traefik

Traefik (pronounced traffic) is a modern HTTP reverse proxy and load balancer that makes deploying microservices easy. Traefik integrates with your existing infrastructure components (Docker, Swarm mode, Kubernetes, Marathon, Consul, Etcd, Rancher, Amazon ECS, ...) and configures itself automatically and dynamically. Pointing Traefik at your orchestrator should be the only configuration step you need.

As described in https://doc.traefik.io/traefik/getting-started/configuration-overview/#configuration-file Traefik will search for static configuration file named traefik.yml or traefik.toml but $XDGCONFIGHOME is replaced by $SNAP_COMMON (/var/snap/traefik/common).

To read configuration from /etc/traefik the etc-traefik plug must be connected.