Virtualization

Virtualization

Posted Jul 19, 2005 13:54 UTC (Tue) by riel (subscriber, #3142)
In reply to: Virtualization by Klavs
Parent article: Kernel Summit 2005: Virtualization

I have been involved with vserver, but gave up after realizing a few drawbacks:

1) every kernel subsystem needs to be virtualized
2) you cannot load different kernel modules in different virtual machines
3) if you have an exploitable kernel bug, every virtual machine is compromised
4) since there is no virtual machine abstraction, installing and managing the virtual systems is very different from the way normal systems are managed

With Xen, there is a much better isolation between virtual machines, and virtual machines can be managed in a way much closer to the way normal machines are managed.

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