[bayindirh]

> You can put any given process is a cgroup. It doesn't have to be a container.

Yes, I run many programs inside cgroups, but not in containers.

> If you have a statically linked executable, setup the cgroup for it as you will. No containers needed. You can namespace is as well.

Yes.

> No `FROM X` `RUN Y` dockerfile stuff needed.

Yes. dockerfile only sets up the chroot in an overlayfs and fires up the "container" using mechanisms present in the kernel already.

As I said on another comment, quoting myself:

> Docker just made the interface more practical, and built the ecosystem around it.