Tag Archives: Virtualization

Mandriva 2010.0 + KVM + Centos 5.x guest = troubles with the clock

We are just in the process of completely reinventing our data center and thus are rolling out a number of Mandriva 2010.0 based servers for various tasks. One of those tasks is virtualization, of course. Now, basically, there is nothing special about virtualization and Mandriva 2010.0 (maybe except this bug [1] that prevents it from Continue Reading →

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Debian+KVM: proxy_arp for individual ip adresses

In one of my older posts [1] I described how you can hide the MAC addresses of KVM virtualized guests living in a dedicated, externally reachable subnet. If however you don’t have a dedicated subnet from your hosting provider but only got only a small number of maybe segmented IP addresses instead of an entire Continue Reading →

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the not so easy migration from VMWare server to KVM for Windows guests

As previously written [1], we are currently migrating our existing VMWare Server 2.0 guests to KVM, running on Debian sid [2] installations (yes, sid indeed, for the sake of a KVM installation as up2date as possible). While things have been really extremely flawless for linux guests, the migration of our Windows guests has more been Continue Reading →

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kvm: windows 2000 does not boot because ntoskrnl.exe is missing or corrupt

We are currently in the process of migrating all our VMWare virtual hosts to KVM [1]. Sometimes this can be quite difficult because KVM apparently has some issues with older guest OS such was Windows 2000. So, if you try to boot Windows 2000, you might fail like this: Disk I/o error: Status = 00000001Disk Continue Reading →

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port security: proxying KVM MAC addresses with Debian Lenny

Following the desaster that occurred when we tried to install a virtual server on a dedicated Hetzner.com root server [1], we had to find a workaround for the problem. The problem itself was that the KVM instance would use it’s own MAC address and thus port security [2] struck us hard, leaving the physical server Continue Reading →

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