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
Category Archives: Linux
Increasing the Size of a qcow2 Image Under KVM
I like to keep my disk images as small as reasonably possible when running virtual machines as I find it just generally makes life easier. Combined with the fact that if you are running LVM it’s easy to expand the disk there’s really no excuse for over specifying on the disk at install time. This guide shows you step by step how to expand a qcow2 disk image and then how to give the guest the extra space. Continue reading
Installing Webmin on Ubuntu 14.04 and 14.10
This is a quick little article showing you how to install Webmin on Ubuntu 14.10 and 14.04 (these instructions should work with older and newer versions as well).Continue reading
Fixing the Default KVM Host Firewall
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
KVM Offline Migration
As a follow on from the earlier series of articles on setting up KVM on Ubuntu 14.04 this article discusses performing an offline migration of a guest. Why offline rather than online? Online migration is fairly simple if you have shared storage but it starts to get awkward without. From what I’ve read an online migration without shared storage is possible but it’s fraught with danger and after trying to get it to work correctly for a couple of hours I gave up and performed an offline migration.Continue reading
Installing Non-Linux Guests on KVM
My KVM set up will almost certainly comprise only Linux machines but there is an outside chance I’ll need to run a Windows server in order to have somewhere to install a copy of SQL Server for development purposes. This article will discuss installing non-Linux based operating systems on / under KVM. I’ll be installing a copy of Windows XP for now as that is what I have immediately available and Windows XP is quite a bit smaller than Windows Server 2014 so should install faster. Either way the process should be largely the same.Continue reading
Getting Started with Byobu
Byobu is a text based window manager and if you haven’t used it before you’ll probably think it’s the best thing you’ve never used. In this quick start guide I’ll show you how to install it and get started with some basic functionality. I’ll be starting with a basic Ubuntu 14.04 server installation but this should work with any recent Ubuntu version. Continue reading
Installing and Running KVM on Ubuntu 14.04 Part 7
In part 6 of this series I looked at setting up a VNC access to the console of a guest machine in this part I’ll be installing a desktop environment.Continue reading
Installing and Running KVM on Ubuntu 14.04 Part 6
In part 5 I talked about auto-starting KVM guest machines and setting up a console that could be accessed through virsh. In this section I’ll cover accessing the guest using VNC.Continue reading
Installing and Running KVM on Ubuntu 14.04 Part 5
In part 4 in this series on installing and running KVM I installed the first guest machine. In this part I’ll tweak the guest so that it’s more to my liking and easier to recover should something go wrong.Continue reading