Here’s a short question I got from one of my readers:
I am a CCIE in SP/DC & working as Technical Architect in US. I follow your website but I don’t know where to start for SDN/Virtualization/Openstack…
I guess he’s not alone, so here’s a long list of resources I put together in the last 5+ years.
Before I get started: you’ll find links to most of these resources on ipSpace.net SDN Resources page.
Read more ...A former colleague who started following the blog asked about the study program used for the CCNP R/S. By the time an email reply was typed up I realized I had a blog post. Since this is fresh on the brain, here’s a breakdown. Important note: I took the previous version of these exams. In […]
The post CCNP RS – a road traveled appeared first on Packet Pushers Podcast and was written by Quentin Demmon.
Nokia shoots and scores, with assists from Sprint and the French government.
I’ve been playing more with SaltStack recently and I realized that my first attempt at using Salt to provision my cluster was a little shortsighted. The problem was, it only worked for my exact lab configuration. After playing with Salt some more, I realized that the Salt configuration could be MUCH more dynamic than what I had initially deployed. That being said, I developed a set of Salt states that I believe can be consumed by anyone wanting to deploy a Kubernetes lab on bare metal. To do this, I used a few more of the features that SaltStack has to offer. Namely, pillars and the built-in Jinja templating language.
My goal was to let anyone with some Salt experience be able to quickly deploy a fully working Kubernetes cluster. That being said, the Salt configuration can be tuned to your specific environment. Have 3 servers you want to try Kubernetes on? Have 10? All you need to do is have some servers that meet the following prerequisites and tune the Salt config to your environment.
Environment Prerequisites
-You need at least 2 servers, one for the master and one for Continue reading
Fiber types are differentiated as multimode or single mode. Single mode was always easy for me to understand but I could never quite understand what ‘multimode’ actually meant. I’m written some notes for myself on this topic that I thought I’d … Continue reading
The post The many ‘modes’ of multimode appeared first on The Network Sherpa.
Range: bytes=0-18446744073709551615As you can see, it's just a standard (64-bit) integer overflow, where 18446744073709551615 equals -1.
HTTP/1.1 416 Requested Range Not SatisfiableFrom the PoC's say, a response that looks like the following means that it is patched:
The request has an invalid header nameHowever, when I run the scan across the Internet, I'm getting the following sorts of responses from servers claiming to be IIS:
In this post, I’m going to show you how to set up a cluster of three nodes running etcd 2.0 (specifically, etcd 2.0.9). While I’ve discussed etcd before, that was in the context of using etcd with CoreOS Linux. In this case, I’ll use Ubuntu 14.04 as the base OS, along with the latest released version of etcd.
To help you follow along, I’ve created a set of files that will allow you to use Vagrant to turn up an etcd 2.0 cluster on Ubuntu 14.04 (on your laptop, if so desired). You can find all these files in the “etcd-2.0” directory of my learning-tools GitHub repository.
You don’t need anything special when setting up etcd; a straightforward Ubuntu Server 14.04 x64 installation will work just fine. If you’re using the files in my learning-tools repository, you’ll see that Vagrant simply turns up a VM based on a plain-jane Ubuntu 14.04 box. If you’re building this from scratch (why?!), simply create a VM and install Ubuntu 14.04 into it. As long as it has Internet connectivity, that’s all that’s needed.
Installing etcd Continue reading
Big names, big money, but few details on an actual product.
