openstack/nova
Code Issues Proposed changes

xenapi: Documents update for XAPI pool shared SR migration

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xenapi is going to support pool-based multi-hosts OpenStack
environments, aggregate-based-pools support was removed in
change I2c492c46e85c1df96aa7fdc12cdee0b1c7ba775e.
This patch is used to update related OpenStack documents.

Change-Id: I9a1244fb23aea99eb246325d5655ab005dca42b4
Implements: blueprint live-migration-in-xapi-pool
This commit is contained in:
naichuans
2018-04-19 05:46:09 +00:00
committed by Matt Riedemann
parent e3a9efab86
commit 8bcb9ee066
2 changed files with 16 additions and 6 deletions
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16
doc/source/admin/configuration/hypervisor-xen-api.rst
View File

@@ -102,6 +102,14 @@ In OpenStack, customer VMs may run in either PV or HVM mode. However, the
OpenStack domU (that's the one running ``nova-compute``) must be running in PV
mode.
xapi pool
---------
A resource pool comprises multiple XenServer host installations, bound together
into a single managed entity which can host virtual machines. When combined with
shared storage, VMs could dynamically move between XenServer hosts, with minimal
downtime since no block copying is needed.
XenAPI deployment architecture
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -226,6 +234,14 @@ The following steps need to be completed after the hypervisor's installation:
#. Install and configure ``nova-compute`` in the above virtual machine.
#. To support live migration requiring no block device migration, you should
add the current host to a xapi pool using shared storage. You need to know
the pool master ip address, user name and password:
.. code-block:: console
xe pool-join master-address=MASTER_IP master-username=root master-password=MASTER_PASSWORD
Install XAPI plug-ins
---------------------

6
doc/source/user/aggregates.rst
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@@ -69,12 +69,6 @@ between aggregates and availability zones:
users to specify hosts where instances are launched in server creation.
See :doc:`Select hosts where instances are launched </admin/availability-zones>` for more detail.
Xen Pool Host Aggregates
------------------------
Originally all aggregates were Xen resource pools, now an aggregate can be set up as a resource pool by giving the aggregate the correct key-value pair.
You can use aggregates for XenServer resource pools when you have multiple compute nodes installed (only XenServer/XCP via xenapi driver is currently supported), and you want to leverage the capabilities of the underlying hypervisor resource pools. For example, you want to enable VM live migration (i.e. VM migration within the pool) or enable host maintenance with zero-downtime for guest instances. Please, note that VM migration across pools (i.e. storage migration) is not yet supported in XenServer/XCP, but will be added when available. Bear in mind that the two migration techniques are not mutually exclusive and can be used in combination for a higher level of flexibility in your cloud management.
Design
------