RancherOS is an incredibly lightweight operating system (only about 60 MB) that runs a "system" Docker daemon as **PID 0** for running system services, (networking, console access and so on), as well as a "user" Docker daemon for running non-system containers, (MySQL, Rancher and more). Rancher is a container-run orchestration platform for managing containers, as well as broader aspects of infrastructure such as hosts, environments and more. A Rancher server controls the orchestration, and a ......