traefik/templates/marathon.tmpl

{{$apps := .Applications}}
[backends]{{range .Tasks}}
    [backends.backend{{.AppID | replace "/" "-"}}.servers.server-{{.ID | replace "." "-"}}]
    url = "{{getProtocol . $apps}}://{{.Host}}:{{getPort .}}"
    weight = {{getWeight . $apps}}
{{end}}

[frontends]{{range .Applications}}
  [frontends.frontend{{.ID | replace "/" "-"}}]
  backend = "backend{{.ID | replace "/" "-"}}"
    [frontends.frontend-{{.ID | replace "/" ""}}.routes.route-host-{{.ID | replace "/" ""}}]
    rule = "{{getFrontendRule .}}"
    value = "{{getFrontendValue .}}"
{{end}}