On Mon, Nov 07, 2011 at 08:00:35AM -0500, Michelle Dupuis wrote:
> Although you say "SIMPLE"...not all virtualization hosts allow
> software installation. On VMware the host has become an appliance you
> can't really mess with...
VMWare (Along with KVM and Xen) is a different beast. LXC (as is OpenVZ
and Linux-VServer on Linux, BSD Jail and Solaris Zones) run on top of
the host kernel. If you're allowed to create an arbitrary device, you
can map yourself the disk and network and escape the jail. Thus those
technologies also limit your ability to access devices and also
typically outright deny the ability to mknod(2).
With VMWare you'd probably be able to create device files, load DAHDI
and whatever. You're running on a separate kernel instance. This gives
better isolation, at the potential cost of performance.
--
Tzafrir Cohen
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