Scott's Weblog The weblog of an IT pro focusing on cloud computing, Kubernetes, Linux, containers, and networking

Technology Short Take #66

Welcome to Technology Short Take #66! In this post you’ll find a collection of links to articles about the major data center technologies. Hopefully something I’ve included here will be useful to you. Enjoy!


  • I recently spoke at Interop 2016 in Las Vegas, and while I was there I scribbled down some notes pertaining to how decomposing applications into microservices-based architectures was similar in some respects to decomposing networks into an overlay network and an underlay (physical) network. It’s still something I’m exploring, but I hope to get something written up soon. In the meantime, I’d love to hear your thoughts about it. Feel free to hit me up on Twitter or drop me an e-mail.
  • While I’m talking about the overlay/underlay model, I found this article by Tom Nolle discussing how using the overlay/underlay model could enable agile infrastructure. It’s a good post, well worth reading (in my opinion).


Nothing this time around. Maybe next time?


  • In the event you’re interested in an idea of how much latency the use of in-kernel hypervisor firewalling (such as that offered by VMware NSX) adds, have a look at this article by Sean Howard.

Cloud Computing/Cloud Management

  • Michael Wittig has an article on using AWS IAM to manage EC2 SSH keys. I’ll have to give this a try—it’s not something I’ve used before.
  • If you think that “infrastructure as code,” particularly when in conjunction with cloud platforms (private or public) isn’t a thing, then you need only look at all the various orchestration tools designed to help you define infrastructure in some format. You have CloudFormation for AWS (uses JSON), OpenStack Heat (uses JSON or YAML), Terraform (uses JSON or HCL, HashiCorp Configuration Language), and now Botoform (uses YAML). I don’t doubt there are more that I’ve missed (and more that will appear).
  • Massimo Re Ferrè recently commented on—in his words—the “incestuous” relationships between all the various orchestration/scheduling tools out there. Is it OpenStack on Kubernetes (aka “Stackanetes”), or Kubernetes on OpenStack (via OpenStack Magnum)? Or Docker on Mesos? Or Mesos on Docker? It almost makes me feel like breaking out in Dr. Seuss’ “Fox in Socks”! In any case, Alex Hudson also noticed the trend, and commented on it as well.
  • I happened to stumble across this article on setting up an OpenStack Liberty environment using DevStack (along with Nuage Networks for networking). (The author’s name isn’t clearly listed anywhere on the site, so I can’t mention the author by name.)
  • Per RFC 1925, every old idea will be proposed again with a different name and a different presentation. Is this the case with AWS Lambda, which Massimo thinks is a return to stored procedures?
  • Speaking of AWS Lambda, here’s an article by CloudSploit on how they leverage AWS Lambda for their security scanning service.

Operating Systems/Applications


  • Guido Diepen has a brief article on a script he wrote to clone Docker data volumes. The script itself is on GitHub.
  • EMC World happened recently in Las Vegas (I was at Interop, also in Las Vegas but at the other end of the Strip), and naturally there were lots of announcements. Probably the easiest thing to do is head over to Chad Sakac’s blog and catch up on the 42 new posts coming out of EMC World. (Bear in mind that Chad works for EMC, so his view will be—quite naturally and understandably—a bit skewed. That’s not a detrimental statement, just an observation.) For additional coverage, you can also check out Ed Haletky’s summary, Dave Henry’s commentary and links, or Matt Healey’s thoughts on Day 3. I’ve no doubt there’s much, much more out there, but this should get you started.


Career/Soft Skills

It’s time to wrap up now before this post gets any longer. Here’s hoping you found something useful here!

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