Red Hat Bugzilla – Bug 1065605
[RFE][glance]: Introspection of images
Last modified: 2016-04-26 12:27:39 EDT
Cloned from launchpad blueprint https://blueprints.launchpad.net/glance/+spec/introspection-of-images. Description: Several formats of images come with a set of metadata embedded inside the image itself. For example, a stream optimized vmdk will look like this: $ head -20 so-disk.vmdk # Disk DescriptorFile version=1 CID=d5a0bce5 parentCID=ffffffff createType="streamOptimized" # Extent description RDONLY 209714 SPARSE "generated-stream.vmdk" # The Disk Data Base #DDB ddb.adapterType = "buslogic" ddb.geometry.cylinders = "102" ddb.geometry.heads = "64" ddb.geometry.sectors = "32" ddb.virtualHWVersion = "4" By introspecting this vmdk, we know easily that the disk_type is streamOptimized and the adapter_type is buslogic. By doing this metadata extraction in Glance, the administrator doesn't have to care about all of these metadata unless he wants to override some of them. These metadata are useful for the consumer of the image: in Nova, the workflow to instantiate a streamOptimized disk is totally different than the one to instantiate a flat disk. This metadata extraction can be achieved using the asynchronous processing provided by this blueprint https://blueprints.launchpad.net/glance/+spec/async-glance-workers Specification URL (additional information): None
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHEA-2015:1548