CoreOS vs. RancherOS
It looks like RancherOS (27MB) has smaller footprint than CoreOS (150MB), from ISO image size perspective.
Should I consider it super than CoreOS in the Docker-native OS distro land?
Should I consider it super than CoreOS in the Docker-native OS distro land?
Docker still has issues where the supervisory process can be badly behaved and having user-level services in a docker supervisor within Docker doesn't fully insulate you from that.
Further, much of the functionality of Systemd is actually quite interesting in the context of a large cluster of machines and it remains to be seen if Rancher will fill the gap as well.