Scott Lowe

DECEMBER 2, 2013

I’ve been doing some experimenting with virtual Ethernet (veth) interfaces in Ubuntu as part of the ongoing work with network namespaces, LXC, and related technologies. Because of this, nothing works—I can’t use the veth pair to connect network namespaces, or to connect a Linux bridge to OVS, or anything else.

Virtualization 61

Virtualization Linux Network Storage 61

Scott Lowe

NOVEMBER 27, 2013

One of the cool things about libvirt is the ability to work with multiple hypervisors and virtualization technologies, including Linux containers using LXC. If you aren’t familiar with Linux containers and LXC, I invite you to have a look at my introductory post on Linux containers and LXC.

Linux 65

Linux Virtualization Network Examples 65

Scott Lowe

SEPTEMBER 11, 2012

This is session COMS002, titled “Next Generation Cloud Infrastructure with Data Plane Virtualization.” Verplanke believes that DPDK (Data Plane Development Kit) and virtualization are key to virtualizing workloads that move around lots and lots of packets, such as firewalls, routers, and other similar functions.

Virtualization 113

Virtualization Intel Cloud Data 113

Scott Lowe

MARCH 21, 2014

Some time ago, I introduced you to the idea of Linux network namespaces, and provided an overview of some of the commands needed to interact with network namespaces. I say “incorrectly” because you are able to assign more than just virtual Ethernet interfaces to a Linux network namespace. Linux Networking CLI'

Linux 73

Linux Network Virtualization Examples 73

Scott Lowe

AUGUST 27, 2021

I have a fairly diverse set of links for readers this time around, covering topics from microchips to improving your writing, with stops along the way in topics like Kubernetes, virtualization, Linux, and the popular JSON-parsing tool jq. Michael Kashin shares the journey of containerizing NVIDIA Cumulus Linux. Networking.

Linux 90

Linux Load Balancer Malware Virtualization 90

Scott Lowe

APRIL 11, 2017

In December 2016, I kicked off a migration to Linux (from OS X) as my primary laptop OS. Let me start by saying that I am actively using a Linux-powered laptop as my primary laptop right now, and I have been doing so since early February. Linux Distribution. I’m using Enpass on my OS X, Linux, and iOS devices.

Linux 60

Linux Report Vmware Travel 60

Scott Lowe

MAY 27, 2022

I mean, don’t you want to spend this weekend catching up on some technology-related articles instead of cooking on the grill and gathering with friends and family? Still, for those who need a little technology fix over the weekend, hopefully I’ve included something useful in the list of articles below. I certainly hope not!

Virtualization 79

Virtualization Storage Programming Network 79

Scott Lowe

JUNE 24, 2022

I’d never heard of Pipy before seeing it in this article , but it look like it could be quite useful for a number of use cases. BPFDoor, as it is known, is a passive backdoor that allows threat actors to remotely connect to a Linux shell. Rob Salmond has a good article on Prometheus service discovery, Istio, and mTLS.

Vmware 74

Vmware Linux Storage Virtualization 74

Scott Lowe

OCTOBER 8, 2021

There’s some networking stuff, a few security links, and even a hardware-related article. As Alec shares in the article, it turns out that adding Tor to a “standard” DoH configuration doesn’t significantly impact performance (as measured by latency). Virtualization. Networking.

IPv6 97

IPv6 Storage Hardware Vmware 97

Scott Lowe

APRIL 29, 2022

My link of links and articles from around the Internet is a bit light on networking and virtualization this time around, but heftier in the security, cloud, and OS/application sections. The idea of a software bill of materials (SBOM) is gaining traction; here’s an article on a tool by Anchore that claims to be able to help.

Linux 74

Linux Storage Programming Applications 74

Scott Lowe

AUGUST 27, 2021

I have a fairly diverse set of links for readers this time around, covering topics from microchips to improving your writing, with stops along the way in topics like Kubernetes, virtualization, Linux, and the popular JSON-parsing tool jq along the way. Michael Kashin shares the journey of containerizing NVIDIA Cumulus Linux.

Linux 60

Linux Load Balancer Malware Virtualization 60

Scott Lowe

FEBRUARY 16, 2017

Here’s another collection of links and articles from around the Internet discussing various data center-focused technologies. The rise of the disaggregated network operating system (NOS) marches on: this time, it’s Big Switch Networks announcing expanded hardware support in Open Network Linux (ONL) , upon which its own NOS is based.

Vmware 60

Vmware Linux Storage Load Balancer 60

Scott Lowe

NOVEMBER 7, 2014

That’s right, it’s time for yet another collection of links and articles from around the Internet on various data center-related technologies, products, projects, and efforts. It was good to read this post on Cumulus Linux first impressions by Jeremy Stretch. ” I highly encourage reading this article.

Vmware 69

Vmware Linux Storage Virtualization 69

Scott Lowe

OCTOBER 8, 2021

There’s some networking stuff, a few security links, and even a hardware-related article. As Alec shares in the article, it turns out that adding Tor to a “standard” DoH configuration doesn’t significantly impact performance (as measured by latency). Virtualization. Networking.

IPv6 60

IPv6 Storage Hardware Vmware 60

Scott Lowe

APRIL 15, 2022

This article contains some good information on IPv6 for those who are just starting to get more familiar with it, although toward the end it turns into a bit of an advertisement. Although Linux is often considered to be superior to Windows and macOS with regard to security, it is not without its own security flaws. Networking.

Linux 74

Linux Load Balancer IPv6 Licensing 74

Scott Lowe

APRIL 6, 2017

I have another collection of links, articles, and thoughts about key data center technologies, and hopefully I’ve managed to include something here that will prove useful or thought-provoking. Here’s a handy list of deprecated Linux network commands and their replacements. Virtualization. Welcome to Technology Short Take #81!

Vmware 60

Vmware Linux Storage Network 60

Scott Lowe

MARCH 2, 2020

It seems like the natural progression of the Tech Short Takes is moving toward monthly articles, since it’s been about a month since my last one. Redpill Linpro talks to readers about their new routers running Cumulus Linux. This article from Bruce Schneier is worth reading. Both are good articles. Servers/Hardware.

Linux 60

Linux Windows Hardware Network 60

Scott Lowe

JANUARY 27, 2023

I’ve got another collection of links to articles on networking, security, cloud, programming, and career development—hopefully you find something useful! This article on using osquery for behavioral detection of macOS malware was an interesting read. Read this article and you will be enlightened.

Programming 90

Programming Open Source Cloud Devops 90

Scott Lowe

FEBRUARY 28, 2022

Thanks to this article , that oversight is now corrected. Oh, and the article shares a handy Python script to help implement bogon filtering in NSX-T. In truth, the answer is exactly as Ivan says at the top of the article: when it comes to migrating container hosts, you don’t. Seriously.). Servers/Hardware.

Storage 79

Storage Hardware Policies Open Source 79

Scott Lowe

NOVEMBER 25, 2020

This article is chock-full of useful information that, typically, can only be gathered from direct experience (like the note on using istioctl instead of the Istio Operator to avoid an issue when upgrading from 1.6 I wasn’t aware of Cloudflare Argo Tunnel, so this article was informative for that reason alone. Good stuff here!

Linux 60

Linux Vmware Open Source Examples 60

Scott Lowe

OCTOBER 18, 2012

Over the last few days, I’ve been unsuccessfully trying to get Open vSwitch (OVS) running on Red Hat Enterprise Linux (RHEL) 6.3 (as The rationale behind this is that RHEL/CentOS are the sort of battle-tested, well-supported Linux distributions that enterprises will (and do) deploy in their data centers. as well as CentOS 6.3).

Enterprise 111

Enterprise Enterprise Linux Virtualization 111

Scott Lowe

MAY 17, 2019

There will be a longer gap than usual before the next Tech Short Take (more details to come on Monday), but in the meantime here’s some articles and links to feed your technical appetite. Courtesy of Tigera, Alex Pollitt shares some guidelines on when Linux conntrack is no longer your friend. Virtualization. Networking.

Linux 60

Linux Dell Open Source Licensing 60

Scott Lowe

AUGUST 21, 2020

Everyone’s favorite three-letter agency recently released some VPN security guidance, as reported by this InfoSecurity Magazine article. The article also provides some links to said guidance, for those that are interested. ” Want to use a Yubikey to automatically lock and unlock your Linux system? ” Storage.

Handbook 60

Handbook Linux Storage Windows 60

Scott Lowe

FEBRUARY 2, 2017

I’ve got a new collection of links and articles from around the Web on various data center-focused technologies. Michael Kashin has a great article on how Open Virtual Network (OVN, part of the Open vSwitch project) implements virtual networks in OpenStack. Have a look at the article for more details. Networking.

Linux 60

Linux Network Virtualization IPv6 60

Scott Lowe

AUGUST 11, 2016

In this post you’ll find a collection of links to articles discussing the major data center technologies—networking, hardware, security, cloud computing, applications, virtualization…you name it! (If MTU in OpenStack Neutron has been, as this article by Sam Yaple points out, a bit of a touchy subject. Networking.

Vmware 60

Vmware Hardware Storage Linux 60

Scott Lowe

NOVEMBER 17, 2016

I recommend reading this article, as well as reading the comments. Cumulus Networks recently introduced the Cumulus Linux Network Command Line Utility (NCLU) , which provides a more unified front-end to configuring switches running Cumulus Linux. Matt Oswalt has a great article on the principles of automation.

Linux 60

Linux Vmware Storage Network 60

Scott Lowe

FEBRUARY 6, 2014

In the process, he muses about the value of configuration management tool chains such as Chef and Puppet in a world of “open switch” platforms such as Cumulus Linux. Speaking of Cumulus Linux…did you see the announcement that Dell has signed a reseller agreement with Cumulus Networks? Servers/Hardware.

Linux 60

Linux Vmware Storage Virtualization 60

Scott Lowe

APRIL 5, 2013

If you want to read a masterpiece of an article describing how OpenStack Quantum works with Open vSwitch (OVS) and the OVS plugin, this write-up by Florian Otel should be your first stop. how each of these components leverages different Linux network namespaces to accomplish their tasks. Networking Virtualization OpenStack Quantum'

Resources 121

Resources Virtualization Linux Network 121

Scott Lowe

OCTOBER 5, 2012

Welcome to Technology Short Take #25, my irregularly-published collection of links, articles, thoughts, and rants. Erik Smith, notably known for his outstanding posts on storage and FCoE, takes a stab at describing some of the differences between SDN and network virtualization in this post. storage enhancements.

Storage 92

Storage Vmware Linux Virtualization 92

Scott Lowe

JUNE 18, 2017

Sjors Robroek describes his nested NSX-T lab that also includes some virtualized network equipment (virtualized Arista switches). Here’s an interesting article on the role that virtualization is playing in the network functions virtualization (NFV) space now that ARM hardware is growing increasingly powerful.

Windows 60

Windows Vmware Virtualization Linux 60

Scott Lowe

JUNE 18, 2017

Sjors Robroek describes his nested NSX-T lab that also includes some virtualized network equipment (virtualized Arista switches). Here’s an interesting article on the role that virtualization is playing in the network functions virtualization (NFV) space now that ARM hardware is growing increasingly powerful.

Windows 60

Windows Vmware Virtualization Linux 60

Scott Lowe

JANUARY 14, 2016

As we start a new year, here’s a collection of links and articles from around the web. Nir Yechiel posted an article on using the Cumulus VX QCOW2 image with Fedora and KVM. Here’s an article on an effort to add Cisco IOS support to NAPALM. Virtualization. Here’s hoping you find something useful to you! Networking.

Vmware 60

Vmware Devops Storage Linux 60

Scott Lowe

DECEMBER 6, 2013

Welcome to Technology Short Take #37, the latest in my irregularly-published series in which I share interesting articles from around the Internet, miscellaneous thoughts, and whatever else I feel like throwing in. Of course, I am a fan of network virtualization, since I work with/on VMware NSX.). (Of Networking.

Vmware 60

Vmware Storage Linux Network 60

Scott Lowe

JUNE 2, 2016

This article from Marcos Hernandez shows one way to do dynamic routing in OpenStack. Jason Messer has an article describing how networking works with Windows containers. Dmitri Kalintsev examines some options for addressing storage-related connectivity in NSX environments. I tend to agree with Russ’ line of thinking.

Vmware 60

Vmware Virtualization Linux Windows 60

Scott Lowe

JULY 22, 2013

Welcome to Technology Short Take #34, my latest collection of links, articles, thoughts, and ideas from around the web, centered on key data center technologies. Greg Ferro, aka EtherealMind, has a great series of articles on overlay networking (a component technology used in a number of network virtualization solutions).

Vmware 106

Vmware Virtualization Network Linux 106

Scott Lowe

NOVEMBER 30, 2018

In response to my request for feedback in the last Technology Short Take, a few readers responded in favor of a more regular publication schedule even if that means the articles are shorter in length. Michael Hausenblas has an informative article with information on Kubernetes RBAC defaults. Virtualization. Networking.

Vmware 60

Vmware Authentication Virtualization Storage 60

Scott Lowe

OCTOBER 31, 2012

Open vSwitch (OVS) is a core component in a number of prominent virtualization- and cloud-related products and projects (consider that OpenStack Quantum, CloudStack, XenServer, and Nicira NVP all leverage OVS). Enable IP routing in the Linux kernel. Wrapping libvirt Virtual Networks Around Open vSwitch Fake Bridges.

Linux 123

Linux Virtualization Network Examples 123