Tags: Virtualization

An Introduction to Linux Virtual Interfaces: Tunnels

Linux has supported many kinds of tunnels, but new users may be confused by their differences and unsure which one is best suited for a given use case. In this article, I will give a brief introduction for commonly used tunnel interfaces in the Linux kernel. There is no code analysis, only a brief...
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Why I Love containerd…and Docker!

I talk a lot about containerd. I write blog posts about it, speak at conferences about it, give introductory presentations internally at IBM about it and tweet (maybe too much) about it. Due to my role at IBM, I’ve helped IBM’s public cloud Kubernetes service, IKS, start a migration to use...
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Nabla on Kubernetes

A while back, we released a demo of the nabla containers runtime, runnc (v0.1). Most recently, we have improved our runtime in several aspects such as better start-up times and memory density. In addition to that (and also the focus of this blogpost), we have implemented Nabla support for...
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Ruby in Containers

There was a time when deploying software was an event, a ceremony because of the difficulty that was required to keep this consistency. Teams spent a lot of time making the destination environments run the software as the source environment. They thereafter prayed that the gods kept the software...
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Virtualizing the Clock

Dmitry Safonov wanted to implement a namespace for time information. The twisted and bizarre thing about virtual machines is that they get more virtual all the time. There's always some new element of the host system that can be given its own namespace and enter the realm of the virtual machine....
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Who Is Running My Kubernetes Pod? The Past, Present, and Future of Container Runtimes

In the Linux operating system world, container technology has existed for quite some time, reaching back over a decade to the initial ideas around separate namespaces for file systems and processes. At some point in the more recent past, LXC was born and became the common way for users on Linux to...
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Open Source Communities Unite Around Cloud-Native Network Functions

Cloud Native Computing Foundation (CNCF), chiefly responsible for Kubernetes, and the recently established Linux Foundation Networking (LF Networking) group are collaborating on a new class of software tools called Cloud-native Network Functions (CNFs). CNFs are the next generation Virtual Network...
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10 Virtualization Mistakes Everyone Makes

Virtualization can give anyone a headache if it’s not properly set up and thought through. Here are the top 10 mistakes and how to prevent them. Although we often discuss virtualization as a new thing, the need for the technology is almost as old as computing itself, dating back to the 1960s....
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Half Year in Review – Four Leading Virtualization Products

Nowadays, virtualization is becoming the top priority need for many organizations and they take special care of it while designing their IT infrastructures. The trend of using virtualization instead of hardware storage is just not an occasional practice rather it has become important because of the...
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Persistent Volumes for Docker Containers

Docker guarantees the same environment on all target systems: If the Docker container runs for the author, it also runs for the user and can even be preconfigured accordingly. Although Docker containers seem like a better alternative to the package management of current distributions (i.e., RPM and...
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