To shamelessly plug a much more minimalist solution, https://github.com/polydawn/siphon-cli https://github.com/polydawn/siphon-cli can also give you new shells

To shamelessly plug a much more minimalist solution, https://github.com/polydawn/siphon-cli https://github.com/polydawn/siphon-cli can also give you new shells shells inside existing containers (or whatever; it's more like screen than anything tightly bound to docker). Siphon does nothing but create and forward psuedoterminals, so it has a lot less features to directly interact with docker than dockersh appears to have, but it's also able to do its job without root or any priviledged syscalls, and doesn't rely on any knowledge of kernel namespaces at all. Which is more useful may depend on your perspective and usecases.