33c7996624
Define it and also link to the term in a few different docs. Change-Id: I6333deb2f6e85eba3c92128dab4e4b4d35355603
68 lines
2.3 KiB
ReStructuredText
68 lines
2.3 KiB
ReStructuredText
PowerVM
|
|
=======
|
|
|
|
Introduction
|
|
------------
|
|
OpenStack Compute supports the PowerVM hypervisor through `NovaLink`_. In the
|
|
NovaLink architecture, a thin NovaLink virtual machine running on the Power
|
|
system manages virtualization for that system. The ``nova-compute`` service
|
|
can be installed on the NovaLink virtual machine and configured to use the
|
|
PowerVM compute driver. No external management element (e.g. Hardware
|
|
Management Console) is needed.
|
|
|
|
.. _NovaLink: https://www.ibm.com/support/knowledgecenter/en/POWER8/p8eig/p8eig_kickoff.htm
|
|
|
|
Configuration
|
|
-------------
|
|
In order to function properly, the ``nova-compute`` service must be executed
|
|
by a member of the ``pvm_admin`` group. Use the ``usermod`` command to add the
|
|
user. For example, to add the ``stacker`` user to the ``pvm_admin`` group, execute::
|
|
|
|
sudo usermod -a -G pvm_admin stacker
|
|
|
|
The user must re-login for the change to take effect.
|
|
|
|
To enable the PowerVM compute driver, set the following configuration option
|
|
in the ``/etc/nova/nova.conf`` file:
|
|
|
|
.. code-block:: ini
|
|
|
|
[Default]
|
|
compute_driver = powervm.PowerVMDriver
|
|
|
|
The PowerVM driver supports two types of storage for ephemeral disks:
|
|
``localdisk`` or ``ssp``. If ``localdisk`` is selected, you must specify which
|
|
volume group should be used. E.g.:
|
|
|
|
.. code-block:: ini
|
|
|
|
[powervm]
|
|
disk_driver = localdisk
|
|
volume_group_name = openstackvg
|
|
|
|
.. note::
|
|
|
|
Using the ``rootvg`` volume group is strongly discouraged since ``rootvg``
|
|
is used by the management partition and filling this will cause failures.
|
|
|
|
The PowerVM driver also supports configuring the default amount of physical
|
|
processor compute power (known as "proc units") which will be given to each
|
|
vCPU. This value will be used if the requested flavor does not specify the
|
|
``powervm:proc_units`` extra-spec. A factor value of 1.0 means a whole physical
|
|
processor, whereas 0.05 means 1/20th of a physical processor. E.g.:
|
|
|
|
.. code-block:: ini
|
|
|
|
[powervm]
|
|
proc_units_factor = 0.1
|
|
|
|
|
|
Volume Support
|
|
--------------
|
|
Volume support is provided for the PowerVM virt driver via Cinder. Currently,
|
|
the only supported volume protocol is `vSCSI`_ Fibre Channel. Attach, detach,
|
|
and extend are the operations supported by the PowerVM vSCSI FC volume adapter.
|
|
:term:`Boot From Volume` is not yet supported.
|
|
|
|
.. _vSCSI: https://www.ibm.com/support/knowledgecenter/en/POWER8/p8hat/p8hat_virtualscsi.htm
|