Tags: containers

Why Unikernels Are Great for DevOps

Unikernels are single-purpose virtual machines (VM). They only run one application—which is interesting when you think about it, because that’s precisely how a lot of DevOps practitioners provision their applications today. There is way too much software to provision nowadays—pools of app servers,...
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Kubernetes
This tutorial describes the steps required to set up a multi-node Kubernetes cluster for development purposes.

Kubernetes Setup Using Ansible and Vagrant

This blog post describes the steps required to set up a multi node Kubernetes cluster for development purposes. This setup provides a production-like cluster that can be set up on your local machine. Why do we require multi node cluster setup? Multi node Kubernetes clusters offer a production-like...
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The What and the Why of the Cluster API

Throughout the evolution of software tools there exists a tension between generalization and partial specialization. A tool’s broader adoption is a form of natural selection, where its evolution is predicated on filling a given need, or role, better than its competition. This premise is imbued in...
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Introduction to YAML: Creating a Kubernetes Deployment

There’s an easier and more useful way to use Kubernetes to spin up resources outside of the command line: creating configuration files using YAML. In this article, we’ll look at how YAML works and use it to define first a Kubernetes Pod, and then a Kubernetes Deployment. YAML Basics It’s difficult...
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Do Linux Distributions Still Matter with Containers?

There are two major trends in container builds: using a base image and building from scratch. Each has engineering tradeoffs. Some people say Linux distributions no longer matter with containers. Alternative approaches, like distroless and scratch containers, seem to be all the rage. It appears we...
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Why Data Scientists Love Kubernetes

Let's start with an uncontroversial point: Software developers and system operators love Kubernetes as a way to deploy and manage applications in Linux containers. Linux containers provide the foundation for reproducible builds and deployments, but Kubernetes and its ecosystem provide essential...
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cockpit
If you’re looking for an easy way to manage a Linux server that includes containers, you should check out Cockpit.

Make Container Management Easy With Cockpit

Learn how to use Cockpit for Linux administration tasks in this tutorial from our archives. If you administer a Linux server, you’ve probably been in search of a solid administration tool. That quest has probably taken you to such software as Webmin and cPanel. But if you’re looking for an easy way...
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Runc and CVE-2019-5736

This morning a container escape vulnerability in runc was announced. We wanted to provide some guidance to Kubernetes users to ensure everyone is safe and secure. What Is Runc? Very briefly, runc is the low-level tool which does the heavy lifting of spawning a Linux container. Other tools like...
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Kubernetes, Docker, ContainerD Impacted by RunC Container Runtime Bug

The Linux community is dealing with another security flaw, with the latest bug impacting the runC container runtime that underpins Docker, cri-o, containerd, and Kubernetes. The bug, dubbed CVE-2019-5736, allows an infected container to overwrite the host runC binary and gain root-level code access...
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15 Docker Commands You Should Know

In this article we’ll look at 15 Docker CLI commands you should know. If you haven’t yet, check out the rest of this series on Docker concepts, the ecosystem, Dockerfiles, and keeping your images slim. In Part 6 we’ll explore data with Docker. I’ve got a series on Kubernetes in the works too, so...
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