This documents the newly implemented behavior of picking
the disk template from the list of enabled disk templates
on instance creation.
Signed-off-by: Helga Velroyen <helgav@google.com>
Reviewed-by: Michele Tartara <mtartara@google.com>
disk templates in the ipolicy, this list is a hard restriction. It is not
possible to create instances with disk templates that are not enabled in
the cluster. It is also not possible to disable a disk template when there
-are still instances using it.
+are still instances using it. The first disk template in the list of
+enabled disk template is the default disk template. It will be used for
+instance creation, if no disk template is requested explicitely.
MASTER-FAILOVER
~~~~~~~~~~~~~~~
please refer to the instance allocator documentation.
The ``-t (--disk-template)`` options specifies the disk layout type
-for the instance. The available choices are:
+for the instance. If no disk template is specified, the default disk
+template is used. The default disk template is the first in the list
+of enabled disk templates, which can be adjusted cluster-wide with
+``gnt-cluster modify``. The available choices for disk templates are:
diskless
This creates an instance with no disks. Its useful for testing only