Docker moans about ports

If you get this:

docker.exe: Error response from daemon: driver failed programming external connectivity on endpoint amazing_lalande (feafa70c6122eb46579cbf74766644fe447bd24897b295157fd67955cff9a8bf): Error starting userland proxy: mkdir /port/tcp:0.0.0.0:9200:tcp:172.17.0.2:9200: input/output erro

… or something like it, just restart Docker and you’re good.

See: https://github.com/docker/for-win/issues/1038