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On Network Virtualization and SDN

Scott Lowe

Is there a difference between network virtualization and Software-Defined Networking (SDN)? So, in a similar fashion to my post on network overlays vs. network virtualization , I thought I’d weigh in with some thoughts. With this definition in hand, let’s compare network virtualization to SDN.

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Technology Short Take 143

Scott Lowe

Here’s a quick look at using Envoy as a load balancer in Kubernetes. Having recently needed to dig into Open Policy Agent (OPA) , I took renewed interest in this slightly older article by Chip Zoller that compares OPA/Gatekeeper with Kyverno. Virtualization. Networking. John Arundel is excited about CUE.

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Technology Short Take 144

Scott Lowe

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. This is an interesting deep dive into Intel’s “Ice Lake” Xeon SP architecture.

Linux 90
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Technology Short Take 143

Scott Lowe

Here’s a quick look at using Envoy as a load balancer in Kubernetes. Having recently needed to dig into Open Policy Agent (OPA) , I took renewed interest in this slightly older article by Chip Zoller that compares OPA/Gatekeeper with Kyverno. Virtualization. Networking. John Arundel is excited about CUE.

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Technology Short Take 144

Scott Lowe

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. A bunch of home Wi-Fi routers are suspectible to attack; see this article for more details.

Linux 60
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Technology Short Take 88

Scott Lowe

Christopher Davis has an article discussing a recommended VPC subnet configuration. This is, of course, just one way of handling subnets within a VPC, but some of the principles outlined in Christopher’s article are definitely sound. This article is pretty high-level; I wish it had a bit more depth to it. Networking.

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Technology Short Take 102

Scott Lowe

It looks like there will be a follow-up to this article as well, so you may want to check back on Ajay’s site. Bernd Malmqvist talks about Avi Networks’ software-defined load balancing solution, including providing an overview of how to use Vagrant to test it yourself. Cloud Computing/Cloud Management.