What is the essential difference between docker and rkt?

Question

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

Portative

Have you already looked at this CoreOS blog post, Why we are building rkt section is probably a good place to start your search? – Buffoon

The blog post you've attached is almost 2 years old, I think linking to more up-to-date sources can give more relevant information, especially when looking at the recent developments in the container wars, like this one - thenewstack.io/docker-fork-talk-split-now-table – Stacystadholder

And you think an recent article that sites no sources about what may or may not happen is more useful than a blog post from the company that created the tool about why they created it? – Buffoon

1. cites, not sites. 2. The recent article cites multiple sources, but still isn't a proper answer in my mind. See my answer below - which answers best to @NeoWang's question, IMHO. – Stacystadholder

Answer 1

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) -

Stacystadholder