Need mechanism to show instance device -> cinder volume mapping.

[Stephen Gordon]

When working with instances where multiple cinder volumes have been attached using device "auto" it would be useful to be able to see which instance device maps to which cinder volume by ID and/or display name.

Ideally I would like to be able to see this from within the instance but being able to view it via one of the nova commands would be a suitable alternative.

[Vish Ishaya (vishvananda)]

This already exists via a nova command:

curl -i http://192.168.50.131:8774/v2/364160178cda4ce29a501ddfcab4d5a6/servers/547a3884-e07b-48d5-8d38-c864a751c6bc/os-volume_attachments -X GET -H "X-Auth-Project-Id: demo" -H "User-Agent: python-novaclient" -H "Accept: application/json" -H "X-Auth-Token: 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...

[Vish Ishaya (vishvananda)]

inside the instance would require something in the metadata server which seems reasonable to add.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/243855

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/243855
Committed: https://git.openstack.org/cgit/openstack/python-novaclient/commit/?id=6a18757509b8ff46eac2e1206ce430aa98bfec6b
Submitter: Jenkins
Branch: master

commit 6a18757509b8ff46eac2e1206ce430aa98bfec6b
Author: Sujitha <email address hidden>
Date: Tue Nov 10 22:41:54 2015 +0000

    Added command for device to cinder volume mapping

    Added new sub command volume-attachments which displays the list
    of volumes attached to a server.

    Change-Id: I1f56a6fa18c35f3df2bdd11b9cf83bd5c5d9e182
    Closes-Bug: #1116593

[Davanum Srinivas (DIMS) (dims-v)]

This issue was fixed in the openstack/python-novaclient 3.0.0 release.

[Markus Zoeller (markus_z) (mzoeller)]

Looks like it could be done purely in the novaclient.