78 lines
2.9 KiB
ReStructuredText
78 lines
2.9 KiB
ReStructuredText
=================================
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Create and manage host aggregates
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=================================
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Host aggregates enable administrative users to assign key-value pairs to
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groups of machines.
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Each node can have multiple aggregates and each aggregate can have
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multiple key-value pairs. You can assign the same key-value pair to
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multiple aggregates.
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The scheduler uses this information to make scheduling decisions.
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For information, see
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`Scheduling <http://docs.openstack.org/liberty/config-reference/content/section_compute-scheduler.html>`__.
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To create a host aggregate
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~~~~~~~~~~~~~~~~~~~~~~~~~~
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#. Log in to the Dashboard and select the :guilabel:`admin` project
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from the drop-down list.
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#. On the :guilabel:`Admin` tab, open the :guilabel:`System` tab and click
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the :guilabel:`Host Aggregates` category.
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#. Click :guilabel:`Create Host Aggregate`.
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#. In the :guilabel:`Create Host Aggregate` dialog box, enter or select the
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following values on the :guilabel:`Host Aggregate Information` tab:
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- :guilabel:`Name`: The host aggregate name.
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- :guilabel:`Availability Zone`: The cloud provider defines the default
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availability zone, such as ``us-west``, ``apac-south``, or
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``nova``. You can target the host aggregate, as follows:
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- When the host aggregate is exposed as an availability zone,
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select the availability zone when you launch an instance.
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- When the host aggregate is not exposed as an availability zone,
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select a flavor and its extra specs to target the host
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aggregate.
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#. Assign hosts to the aggregate using the :guilabel:`Manage Hosts within
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Aggregate` tab in the same dialog box.
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To assign a host to the aggregate, click **+** for the host. The host
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moves from the :guilabel:`All available hosts` list to the
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:guilabel:`Selected hosts` list.
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You can add one host to one or more aggregates. To add a host to an
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existing aggregate, edit the aggregate.
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To manage host aggregates
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~~~~~~~~~~~~~~~~~~~~~~~~~
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#. Select the :guilabel:`admin` project from the drop-down list at the top
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of the page.
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#. On the :guilabel:`Admin` tab, open the :guilabel:`System` tab and click
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the :guilabel:`Host Aggregates` category.
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- To edit host aggregates, select the host aggregate that you want
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to edit. Click :guilabel:`Edit Host Aggregate`.
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In the :guilabel:`Edit Host Aggregate` dialog box, you can change the
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name and availability zone for the aggregate.
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- To manage hosts, locate the host aggregate that you want to edit
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in the table. Click :guilabel:`More` and select :guilabel:`Manage Hosts`.
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In the :guilabel:`Add/Remove Hosts to Aggregate` dialog box,
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click **+** to assign a host to an aggregate. Click **-** to
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remove a host that is assigned to an aggregate.
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- To delete host aggregates, locate the host aggregate that you want
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to edit in the table. Click :guilabel:`More` and select
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:guilabel:`Delete Host Aggregate`.
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