Not Docker. Linux containers (LXC). They predate Docker by a couple years. Docker is app-focused whereas LXC is more machine focused. Docker uses LXC as an underlying technology making them easier to use for deploying apps. Docker is the current poster-child for containers, but most containers are not Docker and containers have existed for years in multiple forms.
* Docker
* XFS as default filesystem, btrfs available
* systemd and .service files replacing the duct tape of overlapping services and shell scripts
* Normal RHEL stuff like SystemTap support
More info: https://access.redhat.com/site/sites/default/files/pages/att...