Docker has launched the latest version of its containerization platform, and with it, placed a heavy emphasis on security updates. The latest release of Docker Engine has now reached version 1.10 (that's one incremental number above 1.09, so as not to be confused with a 1.1 release).
The new additions help answer one of the main objections raised by some of the early critics of the technology -- solving security challenges.
Up until this release, Docker containers have had to run as root under the Docker daemon, bringing with it a host of security concerns. The security solution in Docker 1.10 is a new feature called "user namespaces," a concept that was originally introduced as an experimental feature in Docker version 1.9. User namespaces expands on the idea of granular access policies by allowing multiple namespaces to reside on the same Docker host.