So what wasn't working with nginx was this docker-compose file: docker-compose.hostnetwork.yml Same nginx config with the docker-compose.contained.yml works fine. I had to fix the netmaker-ui entry, add the missing 'v': image: gravitl/netmaker-ui:0.12.1 > image: gravitl/netmaker-ui:v0.12.1 Maybe I need to adjust nginx to point to localhost instead of the container name, since it seems hostnetwork uses host networking mode in the containers?