What is the essential difference between docker and rkt?

containers, coreos, docker, rkt

Solution

You can read all about it in this link

Basically, my impression is that rkt takes pride in being image-agnostic (meaning you can run images that were built using docker or other container engines) and contain less overhead than docker does. This is a nice picture to describe the differences between the two (taken from the link I've attached) -

Problem

How are they functioning differently? Which features of the kernel are they using?

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