a953ecea5b
This adds an implementation of clone_image which offloads the image copy when the image is stored in Glance Cinder store. It uses "create_clone_volume" method to create a new volume from an image that is placed on a cinder volume. To enable this feature, glance_api_version in cinder.conf must be set to 2, and allowed_direct_url_schemes must contain 'cinder'. In glance-api.conf, show_multiple_locations must be set to True. Also the Cinder store must be enabled. In addition, if image_upload_use_cinder_backend is set to True, upload-to-image in raw format will create a cloned volume and register its location to the image service. If image_upload_use_internal_tenant is set to True, the image volume is stored in the internal tenant. Otherwise it is placed in the current context's tenant. This also changes LVM driver implementation to enable image upload. Especially for thin LVM, it modifies create_cloned_volume method to create thin snapshot LV. Note that the thin snapshot LV can be treated as the normal LVs; it can be read/written and can survive after the parent volume is deleted. Only raw format image is supported. Otherwise, normal image upload/download method is used. Currently Glance Cinder store does not support upload and download, so the image created by this feature cannot be used by other projects than Cinder. Patches to provide access to images stored on Cinder are proposed here: glance-specs: https://review.openstack.org/183363 glance patch(adding rootwrap): https://review.openstack.org/186201 glance_store patch: https://review.openstack.org/166414 Note that this change works even without Glance patches. Change-Id: I2cb68749f194d0cd597b7258a317afb982236aea Implements: blueprint clone-image-in-glance-cinder-backend DocImpact |
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| README.txt | ||
Brick has been migrated to a new standalone pypi library called os-brick. We are leaving the local_dev directory here for the time being until we can migrate it to a new home.