From d29d93f200ae83e86849e24d77b17f1176adc6d1 Mon Sep 17 00:00:00 2001 From: Lucian Petrut Date: Tue, 14 Apr 2020 10:22:03 +0300 Subject: [PATCH] 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 --- doc/source/configuration/index.rst | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/doc/source/configuration/index.rst b/doc/source/configuration/index.rst index 6e4e644e..3a1c0e1a 100644 --- a/doc/source/configuration/index.rst +++ b/doc/source/configuration/index.rst @@ -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 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~