Convert image to raw when using rbd imagebackend

[ling-yun]

Add info about image format convert when using rbd imagebackend.

Detail info as follows:
When using a qcow2 to create a vm with rbd imagebackend, the vm can be
successfully created. Although vm's state is active, vm's console show
that it can not find boot disk. From ceph's docs, we find that Ceph only
works with raw volumes, so we need to convert an non-raw format image to
raw image when creating vm using rbd imagebackend.

[Gauvain Pocentek (gpocentek)]

Any news on this?

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/210222

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/210225

[OpenStack Infra (hudson-openstack)]

Change abandoned by IanSun ([e-mail]) on branch: master
Review: https://review.openstack.org/210222
Reason: comited by mistake

[OpenStack Infra (hudson-openstack)]

Change abandoned by IanSun ([e-mail]) on branch: master
Review: https://review.openstack.org/210225

[Justin Shepherd (jshepher)]

Partial-Bug: https://review.openstack.org/#/c/275771/

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/346721

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/346721
Committed: https://git.openstack.org/cgit/openstack/openstack-manuals/commit/?id=8a94396e1aab75cdafc85b5dc36045885c1a411f
Submitter: Jenkins
Branch: master

commit 8a94396e1aab75cdafc85b5dc36045885c1a411f
Author: KATO Tomoyuki <email address hidden>
Date: Mon Jul 25 20:49:26 2016 +0900

    [config-ref] add image format note about Ceph RBD back end

    http://docs.ceph.com/docs/master/rbd/qemu-rbd/

    backport: mitaka

    Change-Id: Ic86b0a3d7851817c420cc7257c42bbd06c33b64f
    Closes-Bug: #1356163

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/mitaka
Review: https://review.openstack.org/347675

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/347675
Committed: https://git.openstack.org/cgit/openstack/openstack-manuals/commit/?id=03246ef25da930140dbd62bca4027b04e736567f
Submitter: Jenkins
Branch: stable/mitaka

commit 03246ef25da930140dbd62bca4027b04e736567f
Author: KATO Tomoyuki <email address hidden>
Date: Mon Jul 25 20:49:26 2016 +0900

    [config-ref] add image format note about Ceph RBD back end

    http://docs.ceph.com/docs/master/rbd/qemu-rbd/

    backport: mitaka

    Change-Id: Ic86b0a3d7851817c420cc7257c42bbd06c33b64f
    Closes-Bug: #1356163
    (cherry picked from commit 8a94396e1aab75cdafc85b5dc36045885c1a411f)

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/openstack-manuals 15.0.0 release.