I'd say it depends very much on your threat model. Would I trust a Docker container with a hostile multi-tenant setup without additional controls.... no. Is th

I'd say it depends very much on your threat model. Would I trust a Docker container with a hostile multi-tenant setup without additional controls.... no. Is the isolation provided by Docker worth nothing, from a security perspective... also no :) Hardening containers is a good element of an overall security strategy. It needs to be combined with other controls, both preventative controls at things like the network layer, and detective controls to spot when a preventative control fails and allow for rapid mitigation.