RE: [Xen-devel] [PATCH]: xl: use libuuid to generate random UUID's

[Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>]

Gianni Tedesco (3P) writes ("RE: [Xen-devel] [PATCH]: xl: use libuuid to 
generate random UUID's"):
> On Mon, 2010-08-09 at 11:51 +0100, Ian Jackson wrote:
> > VM uuids are not stable in xend nor xl.  Perhaps xl should hash the VM
> > name, which is stable and supposedly unique.
> 
> But they can be made to be stable and I suppose this is the point here.

No, I don't think VM uuids can be made stable in xl.  If for no other
reason than that localhost migration would be impossible.

I think the only way to have stable MAC addresses is to derive them
from the VM name, or for the user to explicitly write a MAC address in
the config file.

Users who do the latter will find things continue to work no matter
how we change the default scheme, and the default is already somewhat
broken, so perhaps we should indeed consider changing it.

Ian.

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