Planet Hypervisor

The Free Software patent paradox

On my last post I reviewed the rapid pace of evolution of free software, open source software and legal evolutions and the implications for business models. There is an interesting set of problems which arise in light of all these evolutions in consideration of personal freedoms, existing business models and patents which I'd like to review now which in the worst case scenario make free software and open source software targets. I'll refer to this as the free software patent paradox. A paradox, as per my lazy search on google, is defined as:paradox: a statement or proposition that, despite sound...

Xen Project User Summit 2014 Videos Now Available

The Year’s Biggest Xen Project User Event Now Available at Your Desk or On Your Phone You didn’t make it to this year’s Xen Project User Summit in New York City?  Or you didn’t catch all the sessions you wanted to see because of scheduling conflicts (it happens when you have too much of a […]

Automating backport kernel integration support

I cringe when I see a task which could be automated done manually, but complex tasks are not trivially considered possible to be automated -- to even fathom such possibilities on complex tasks at times you have to divide the work into sub tasks and eventually see if its possible to automate a series of them and which ones cannot be automated. I've had a hunch about about the prospects of fully automating Linux kernel backporting for a while now, over the years a set of advances and practices on the backports project has increased my confidence of these prospects,...

RICON 2014 Build a Cloud Day - Videos are Available

On October 27th, 2014 the Open@Citrix team hosted a Build a Cloud Day at RICON 2014. Thank you to the speakers who presented that day! For those of you who haven't attended a Build a Cloud Day, here's what Build a Cloud Day is all about. Build a Cloud Days are free to attend and held around the world. Build a Cloud days are designed to expose attendees to the concepts and best practices around deploying cloud computing infrastructure. Attendees learn how to deploy a cloud computing environment using Apache CloudStack and other cloud infrastructure tools including those from XenServer, Docker, RiakCS,...

Xen Project 4.5 RC2 Test Day is November 13

Join in the Next Round of 4.5 Release Candidate Testing on Thursday The Test Day for 4.5 RC2 has been set for this Thursday, November 13, 2014. Test Days insure that the upcoming release is ready for production.  It also allows power users to test out the upcoming release in their own environment. Subsequent Test […]

Understand XenServer VM High availability

This article in a introduction to the VM HA mechanism in XenServer. Implementing VM High availability is a real challenge: first because you need to reliably detect when a server has really failed to avoid unpredicatble behavior. But that's not the only problem. If you lose the network link but not the storage shared storage, how to ensure you will not write simultaneously on the storage and thus corrupt all your data? That's why XenServer is an awesome product (as its API, the XAPI): it handles flawlessly that kind of stuff. We'll see how to protect your precious VM in multiple...

Fedora automated install on Xenserver updated.

I have a tendency to keep using the same tutorials of mine and only when I need them updated do I go through the process of writing, testing and publishing the changes. However, when people attempt to use my Xenserver tutorials to install newer versions of Linux I tend to go update them but if nobody asks then they get ignored. You can tell which tutorials I use by which ones are up-to-date. For instance the Ubuntu Automated Install is still stuck at Ubuntu 12.04. That probably needs to be rectified but since I rarely use Ubuntu it's on the...

Automated install of Fedora 20 VM (32 bit)

Note: updated for XCP 1.5b/1.6 and Xenserver 6.x Install Type Non-interactive Network boot Commandline Paravirtualized Prerequisites XCP/Xenserver Access to Internet Working DHCP server Working DNS name resolution Introduction This tutorial was originally written for CentOS and has been adapted for Fedora 20.   Note: This tutorial is designed so you can copy and paste the text inside the boxes. I don't actually type any of this in and neither should you.   1. Getting the network info This line gets the Network UUID for xenbr0. If you're using a different bridge you will want to insert it here. Get a list of XCP networks with xe network-list. This network is connected to the outside interface. This tutorial...

Basic Network Testing with IPERF

Purpose I am often asked how one can perform simple network testing within, outside, and into XenServer.  This is a great question as – by itself – it is simple enough to answer.  However, depending on what one desires out of “network testing” the answer can quickly become more complex. As such, this I have decided to answer this question using a long standing, free utility called IPERF (well, IPERF2).  It is a rather simple, straight-forward, but powerful utility I have used over many, many years.  Links to IPERF will be provided - along with documentation on its use - as it...

LVMiSCSI cinder backend for RDO Juno on CentOS 7

Current post follows up http://lxer.com/module/newswire/view/207415/index.html RDO Juno has been intalled on Controller and Compute nodes via packstack as described in link @lxer.com. iSCSI initiator implementation on CentOS 7 differs significantly from CentOS 6.5 and is based on  CLI utility targetcli and service target.  With Enterprise Linux 7, both Red Hat and CentOS, there is a […]