With that background out of our way, let us understand the major pieces that Docker has brought in today. And with Windows OS, also working with Docker for container integration, we sure will see many cloud services being run as containers on multiple OS’es. If different versions of OS, or different OS are needed, then virtual machines are needed still. It would be prudent to note that only userspace virtualization is possible in container world. And Docker Inc, opensourced a suite of tools, that provides a clean and easy workflow to distribute, create and run container based solutions.Īnd Kubernetes and Mesos applications are built over native OS support on containerization. But today, Linux seems to rule the world! With relatively recent advancements in Linux for control groups and namespaces, it enhanced Linux to have highly sandboxed environment for containers. And *bsd jails has been doing total container virtualization since time immemorial. The basis for all this stems from chroot system call introduced way back in 1982! Although chroot accomplished a new root filesystem view for applications to run, it opened up the need for rest of the OS pieces to be virtualized too. Solaris projects/zones, BSD Jails and LXC containers all do userspace compartments. ![]() To understand and appreciate Kubernetes, Mesos and Docker engine, it will be worth the effort to look at their fundamental building blocks.įigure 1: VM vs Containers 2 Some History The container lifecycle management by itself is done by Docker engine, part of Docker. This learning they had with container management is being used in the design and implementation of Kubernetes. Google made lots of assumptions to begin with, and in hindsight some of them were great. In short, containers are lightweight totally isolated userland sandbox for running processes when compared to virtual machines 1.īefore Software defined anything was even spoken about, Google had designed their very own Borg Cluster running and managing container based micro services. But then there was Google, who were not just experimenting but deploying with great success in live networks another new model called Containers. Industry got busy integrating virtual machines as part of standard workflow. The success of virtual machine adaptation in varied domain puts any argument against to rest, beyond any doubt.Ĭompanies widely posted their success stories to describe the scaling of their physical infrastructure and failure resolution. Therefore it was assumed virtualizing CPU would provide more benefits. It has been known for some time that CPU performance lay wasted, as its performance is far ahead than either the network or memory components. There is not just compute virtualization, there is storage and network virtualization too. Virtualization by extended definition enables higher utilization of deployed resources. Any place, where a logical handle of a physical resource is provided, enabling sharing of the physical resource is deemed virtualized. Today virtualization is an umbrella term widely used everywhere. Physical machine virtualization has started off a great trend in many areas. This article tries to explore this latest buzz around Containers. Docker, Kubernetes and Mesos are being discussed everywhere and are projected as the next big thing to watch out for. ![]() Today it is Containers based micro services that is doing it again. VMware brought physical machine virtualization to commercial world about a decade ago. This blog article briefs the current technological trends and advances made to enable cloud scale orchestration possible.
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