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> A minimal, service oriented, includeable library operating system for cloud services

I think the operating system for cloud services is need to be able to run heterogeneous system. Which Mesos & CoreOS are headed towards this idea via containerization.

Why build an OS that only run a C++ for cloud services? Is there any use case/problems that the author trying to solve?

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It is generally assumed virtual machines have better isolation (security-wise) than operating system level isolation like the containerization Mesos and CoreOS are making use of.

CoreOS and SELinux together is pretty secure if set up properly; even if you broke out of a container you wouldn't be able to do anything, even start a process. But still, yeah, in a unikernel there is no 'breaking out' at all.

What I want to know is how this is better/different compared to Rumprun or OSv. They appear to be its closest competitors.

https://github.com/rumpkernel/rumprun/

http://osv.io/

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