When I worked with docker containers, I noticed that they seem to present a full OS, with a FS that you had to manage. I had to change /etc config files, mange

When I worked with docker containers, I noticed that they seem to present a full OS, with a FS that you had to manage. I had to change /etc config files, mange where logfiles went and how they were handled, all of this is described on a diffing filesystem. I might be misinterpreting what you mean though. I have no experience with OpenVZ and little with Docker.