Summary
The advent of kernel namespaces and cgroups made it possible to isolate groups of processes in a self-confined lightweight virtualization package; we call them containers. In this chapter, we saw how containers provide the same features as other full-fledged hypervisor-based virtualization technologies such as KVM and Xen, without the overhead of running multiple kernels in the same operating system. LXC takes full advantage of Linux cgroups and namespaces to achieve this level of isolation and resource control.
With the foundation gained from this chapter, you'll be able to understand better what's going on under the hood, which will make it much easier to troubleshoot and support the full life cycle of Linux containers, as we'll do in the next chapters.
