[node-devel] [Users] The machine type of one cluster

[Kewei Yu]

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

[Itamar Heim]

Post by Kewei Yu
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
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.

[Kewei Yu]

Post by Kewei Yu
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
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