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[OpenStack Infra <1346857@xxxxxxxxxxxxxxxxxx>]

** Changed in: nova
       Status: Opinion => In Progress

** Changed in: nova
     Assignee: (unassigned) => Claudiu Belu (cbelu)

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https://bugs.launchpad.net/bugs/1346857

Title:
  HyperV driver does not implement Image cache ageing

Status in OpenStack Compute (nova):
  In Progress

Bug description:
  Nova.conf has the following options for image cache ageing
  remove_unused_base_images
  remove_unused_original_minimum_age_seconds.

  If these conf values are enabled, older un-used images cached on the hypervisor hosts will be deleted by nova-compute.
  The driver should implement the defn manage_image_cache
  and this will be called by compute.manager._run_image_cache_manager_pass().

  The HyperV driver does not implement manage_image_cache() which means
  older unused images (VHD/VHDFx) will never get deleted and occupy
  storage on the HyperV host, which otherwise can be used to spawn
  instances.

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