Bug 1065605

Summary: [RFE][glance]: Introspection of images
Product: Red Hat OpenStack Reporter: RHOS Integration <rhos-integ>
Component: openstack-glanceAssignee: Flavio Percoco <fpercoco>
Status: CLOSED ERRATA QA Contact: nlevinki <nlevinki>
Severity: medium Docs Contact:
Priority: high    
Version: unspecifiedCC: eglynn, fpercoco, markmc, scohen, yeylon
Target Milestone: Upstream M3Keywords: FutureFeature, Triaged
Target Release: 7.0 (Kilo)   
Hardware: Unspecified   
OS: Unspecified   
URL: https://blueprints.launchpad.net/glance/+spec/introspection-of-images
Whiteboard: upstream_milestone_kilo-3 upstream_status_implemented upstream_definition_approved
Fixed In Version: openstack-glance-2015.1.0-6.el7ost Doc Type: Enhancement
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2015-08-05 13:11:43 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 1213684    

Description RHOS Integration 2014-02-15 05:07:55 UTC 
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
Comment 6 errata-xmlrpc 2015-08-05 13:11:43 UTC 
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