Cntainers is nothing but a server virtualization method. Also known as “Operating-system-level virtualization”. Currently, the IT world is turning to containers, but to control them you need container management programs. That’s where Kubernetes, Mesosphere, and Docker Swarm step in.
Containers, a lightweight way to virtualize applications, are an important element of any DevOps plan. But how are you going to manage all of those containers? Container orchestration programs—Kubernetes, Mesosphere Marathon, and Docker Swarm—make it possible to manage containers without tearing your hair out.
Before jumping into those, let’s review the basics. Containers, according to 451 Research, are the fastest growing cloud-enabling technology. The reason for their appeal is that they use far fewer system resources than do virtual machines (VMs). After all, a VM runs not merely an operating system, but also a virtual copy of all the hardware that the OS needs to run. In contrast, containers demand just enough operating system and system resources for an application instance to run.