Over the years I’ve read my fair share of books on various aspects of computing from operating system design through to test driven development and for the last few years I’ve also been taking MOOC’s as I like the learning style. It occurred to me that I should probably keep a list so that I can see what I need to brush up on and what gaps I have to fill. For the most part this is going to be a list starting Summer 2015 but I might try and fill in some of the history if I get a chance to sit down and think about what I’ve read and when. I study a wide range of science based topics but I’ll try and keep this list focused on things that are relevant to the computing.Continue reading
In the series of articles I wrote discussing the installation of KVM on Ubuntu I spent articles 2 and 3 discussing the network set up but it occurred to me that it was actually an unnecessarily difficult set up and so in this article I’ll discuss a simpler KVM network configuration set up.Continue reading
I’ve just set up a new BIND DNS server for a new network. I configured the network in a way I’ve not done before which was to have the servers on a different subnet to the regular machines and other devices. I prefer this set up but it has resulted in me having to do some reading up about network configuration. Anyway, all was going well until I switched over to my new DNS server…Continue reading
I recently installed KVM on my laptop and all was going reasonably well until I tried to connect to the internet from one of the guests. For some reason that I couldn’t fathom at first the guest couldn’t talk to the internet and the local network couldn’t talk to the guest. This surprised me because I’d already checked that the host could reach the internet and the local network could reach the virtual bridge and the host. I was also fairly sure that I had checked my first guest could access the internet but I couldn’t be sure.Continue reading
In part 1 of the series I covered basic machine set up and preparation. In this second part of the series about setting up KVM on Ubuntu 14.04 I cover setting up the network. Setting up the network can seem quite daunting but a basic KVM install doesn’t actually require much network set up.
As I mentioned in the previous article Understanding Bridges, Linux and most other operating systems have the ability to create virtual interfaces which are usually called TUN/TAP devices. This article will discuss those devices with particular focus on how they are used in OpenStack.Continue reading
In this article I’ll discuss network bridges and where they are commonly used (spoiler: they aren’t any more). Mainly though I want to discuss how bridges are used in an OpenStack set up as building a personal cloud is my final aim. Hardware network bridges aren’t as common as they once were as switches have largely replaced hubs in the network so there’s no problem with large collision domains. Continue reading