openstack
/
compute-hyperv
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Document image cache manager limitation 

When the compute hosts are using different CSVs, Nova must be
configured not to delete unused images since its image caching
mechanism can't properly track the image files in this case.

In particular, instances that were moved to other hosts won't be
tracked and their base images might be removed.

This is not a concern when not using shared storage or when using
a single shared folder (which might as well be a CSV).

Change-Id: If730f59473df576fd32eae5b930c60b1125d7ff1
This commit is contained in:
Lucian Petrut 2020-04-14 10:22:03 +03:00
parent 3a7ea8e7cd
commit d29d93f200
1 changed files with 9 additions and 0 deletions
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9
doc/source/configuration/index.rst
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@ -77,6 +77,15 @@ Alternatively, CSVs can be used:
[DEFAULT]
instances_path = C:\ClusterStorage\Volume1\OpenStack\Instances
When the compute hosts are using different CSVs, Nova must be configured not
to delete unused images since its image caching mechanism can't properly track
the image file usage in this case.
.. code-block:: ini
[image_cache]
remove_unused_base_images = False
Block Storage (Cinder) configuration
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~