Upgrade Notes for Docker 1.5.0 ============================== Docker 1.5.0 introduced several new features. .. see:: http://docs.docker.com/release-notes/#version-150 As such several new Kernel configuration options are **required**: - ``CONFIG_CGROUP_FREEZER=y`` - ``CONFIG_CPUSETS=y`` - ``CONFIG_CGROUP_PERF=y`` - ``CONFIG_POSIX_MQUEUE=y`` Please make sure when you're upgrading your Docker engine that you ensure these new Kernel configuration options are enabled.