[Rdo-list] Why do I need KVM, XEN, if I can use Docker / LXC?

Arash Kaffamanesh ak at cloudssky.com
Mon Feb 17 23:21:13 UTC 2014

Many thanks for your great answers!
So we have to wait for security, stability and live migration support to
become an attractive alternative :-)

Thanks again!

On Mon, Feb 17, 2014 at 11:56 PM, Lars Kellogg-Stedman <lars at redhat.com>wrote:

> On Mon, Feb 17, 2014 at 11:42:21PM +0100, Arash Kaffamanesh wrote:
> > Why someone shall use KVM, Xen or other hypervisors instead Docker / LXC
> > Containers on OpenStack?
> There are also a number of situations in which a container based
> solution may not offer sufficient flexibility. For example:
> - A container based solution cannot run a kernel other than the one in
>   use on the physical host.  This may not be compatible with the
>   operating system your clients want to run.
> - A container based solution cannot run a completely different
>   operating system.  People often want to run Windows instances in the
>   cloud, and occasionally other non-Linux options like FreeBSD.
> Additionally, the container driver for OpenStack are not yet as mature
> as the hypervisor drivers, and may lack the features or stability to
> make them an attractive alternative.
> --
> Lars Kellogg-Stedman <lars at redhat.com> | larsks @ irc
> Cloud Engineering / OpenStack          | "   "  @ twitter
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