@markvr Thanks for the feedback so far. The veth leak is most likely a bug in the docker engine rather than something specific to Docker4Azure. I am still investigating it with other members of the team and will get back regarding findings.
The logger issue should be fixed in the recent patch release for the stable channel (17.03.1) (https://download.docker.com/azure/stable/17.03.1/Docker.tmpl). The docs are in the process of being updated to announce the release. In edge channel, the fix will be available as part of the April (17.04) release.