Re: [vdsm] [Users] The machine type of one cluster

[Kewei Yu]

2014/1/26 Itamar Heim
> On 01/25/2014 04:23 AM, Kewei Yu wrote:
> > Hi all:
> >      There is a "machine type" in cluster, It will decide which machine
> > of Qemu will be used, When we add the first host into cluster, a default
> > machine type is shown. We can correct the DB's value of the engine to
> > set the machine type.
> >      I just want to know how dose cluster choice the default machine? It
> > is decided by VDSM? Qemu? or It is only fixed value in engine's DB?
> >
> > Regard
> > Kewei
> >
> > vdsm-devel mailing list
> > [e-mail]
> > https://lists.fedorahosted.org/mailman/listinfo/vdsm-devel
>
> basically, for fedora its 'pc', which may have some live migration issues
> between different versions in the same cluster.
> for .el6, its 'rhel63/rhel64/rhel65/etc.', which is a stable definition of
> emulation mode for the cluster (i.e., even a .el7 host should live migrate
> to .el6 if we specify its emulation mode as rhel65, etc.)
>
> engine defines per cluster level the expected emulation mode.
> vdsm reports from libvirt from qemu, so engine can check the host is a
> match.
> if the first host in the cluster is fedora, it will be set to 'pc', if its
> .el6, it will be set to the 'rhelxx' option.

Thanks for your answer, It is helpful to me.

Regard
Kewei