Virtualisation

SCVMM 2012 and 10698 errors

This is perhaps another example of my recent comment about SCVMM making harder work of things than perhaps it should, but for all that I want to also say that it’s very likely that the root cause of this error was a mistake on our part. I also want to share this in case someone else has a similar problem. On one of our clusters, I noticed that one or two guests were failing to migrate to a particular host.

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Migrating from VSphere/ESX to SCVMM/HyperV

We’ve always been a VMWare shop. As some of you might know, I’ve been involved in the Microsoft virtualisation stack in the past, writing guides for Virtual PC and bits and pieces for the server products, but on the server side of things, at least, VMWare have always had the lead. They’ve had the advantage of beating Microsoft (and others, but this article isn’t about those) to market and the advantage of being able to concentrate on virtualisation because it’s all they do.

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Robert's Modern Sysadmin Rules, Part 2

5. "Nuke from orbit" is still the best approach to a rooted system. See http://serverfault.com/a/218011/7783 I've talked about this in the Server Fault answer above, and I might do another post diving into some of the details behind my beliefs here but the drive to rebuild after getting a system compromised comes down to trust. For an illustration of why I use that word, please read "reflections on trusting trust"

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Optimising for a virtual environment

In my last post, I talked about optimising virtual machine builds for the virtual environment. In this post, I shall talk about how to do just that. My employer implemented a VMWare ESX farm in 2008, using the “enterprise” level of their product, which includes tools like vCenter and vMotion. We imported a large number of physical machines into virtual machines and created a number of new virtual machines to deal with various projects.

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The 4 stages of virtualisation

As virtualisation becomes more popular, and as I’ve done a few projects with this myself and both helped and watched others do virtualisation projects, I think there are probably at least four stages to the life cycle of virtualisation within an organisation, and I thought it might be interesting to compare and contrast them. It’s important to remember that while some organisations will go through all the stages, others will skip certain stages, and its very important to remember that the stages are standalone goals in their own right; its perfectly reasonable only complete the first stage listed below and stick with it if that is all the business needs to do.

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